Debating on new bike Levo 4 comp vs Amflow

[Citylad77]

Factory spec being too firm is the most common starting point for heavier riders on a new bike, so that tracks. The suspension team tuning for an average rider weight means someone with your mileage and style is almost always going to want to go softer initially, then work back up from there.

Shock pump on the next ride is exactly the right call. Drop the pressure in small increments, maybe 5-10psi at a time, and note where it starts to feel like it's breathing properly through the stroke rather than sitting on top of the terrain. With your history across multiple platforms you'll find that sweet spot quickly.

On the tyres, do you know what compound and casing Amflow are speccing on the new Pro? That's the missing piece. Factory-fitted rubber can vary wildly in feel and optimal pressure range, and if you're running something you've got no baseline with, the suspension will feel different to what it actually is until you've sorted the contact patch. What are they rolling with these days?

They are Schwab’s Albert gravity on the rear with magic Mary on the front. They feel like they have plenty of grip but firm. I am running 25psi front and rear.

 

[Greg Watts]

They are Schwab’s Albert gravity on the rear with magic Mary on the front. They feel like they have plenty of grip but firm. I am running 25psi front and rear.

Good tyre combo. Magic Mary front and Albert Gravity rear is a proper setup, and not a surprise given the Pro's positioning.

On pressure: 25psi front and rear is on the low side for radial construction, and likely part of why it's feeling firm and slightly "dead."

Schwalbe's own guidance for radials is to start at your usual pressure, then experiment going higher, because even at elevated pressures the radial carcass maintains a larger contact patch than a conventional tyre at lower pressure.

A starting point of 3 - 5psi over your usual pressures is the general recommendation for radials.

Tested on the Albert Gravity specifically, off-road.cc ran 25psi front and 28psi rear as their starting point, and most reviewers ended up higher than that on the rear.

One tester bumped up in 5psi increments until it was too high, then settled at 25psi front and 31psi rear, describing that range as "as lively and responsive as previous tyres while maintaining the larger traction patch."

The Magic Mary front is a different story - it's pressure-sensitive and can feel harsh if run too hard, with the sidewalls offering plenty of support as low as 20psi.

So the front wants to be explored downward from 25, not upward, while the rear wants to go up a few psi.

Given your Midlands trails are damp today, I'd try 22psi front, 28psi rear on the next outing. That's a proper starting point for this combination on wet, rooty ground. Dial from there.

 

[Citylad77]

Good tyre combo. Magic Mary front and Albert Gravity rear is a proper setup, and not a surprise given the Pro's positioning.

On pressure: 25psi front and rear is on the low side for radial construction, and likely part of why it's feeling firm and slightly "dead."

Schwalbe's own guidance for radials is to start at your usual pressure, then experiment going higher, because even at elevated pressures the radial carcass maintains a larger contact patch than a conventional tyre at lower pressure.

A starting point of 3 - 5psi over your usual pressures is the general recommendation for radials.

Tested on the Albert Gravity specifically, off-road.cc ran 25psi front and 28psi rear as their starting point, and most reviewers ended up higher than that on the rear.

One tester bumped up in 5psi increments until it was too high, then settled at 25psi front and 31psi rear, describing that range as "as lively and responsive as previous tyres while maintaining the larger traction patch."

The Magic Mary front is a different story - it's pressure-sensitive and can feel harsh if run too hard, with the sidewalls offering plenty of support as low as 20psi.

So the front wants to be explored downward from 25, not upward, while the rear wants to go up a few psi.

Given your Midlands trails are damp today, I'd try 22psi front, 28psi rear on the next outing. That's a proper starting point for this combination on wet, rooty ground. Dial from there.

Thanks,
Can you recommend a portable power unit please? I think this is going to be useful on some UK rides in the Welsh mountains on these high power bikes .I noticed Rob reviews one recently but can’t recall which one.

 

[Greg Watts]

Thanks, Can you recommend a portable power unit please? I think this is going to be useful on some UK rides in the Welsh mountains on these high power bikes .I noticed Rob reviews one recently but can’t recall which one.

Right, @Citylad77. For Welsh mountain weekends on an 800Wh Amflow, you want something with enough capacity to give you a meaningful top-up (or ideally a full charge) from the boot of your car or a campsite.

The Rob review you're thinking of was a Bluetti. He's been using it extensively for camping, bike charging, and laptop use, and with a 6A charger he was giving his bike a spray charge for 45 mins from the van and getting a decent boost. He's still using it and rates it highly.

The key maths for your situation: you lose 15-20% capacity through inverter inefficiency, so for an 800Wh battery you'd want at least a 1000Wh power station for one full charge.

The big three brands are EcoFlow, Bluetti, and Jackery. For a single Amflow charge plus phones and bits, a unit in the 1000-1500Wh range is the sweet spot, keeping the weight manageable for chucking in and out of the car. Go 2000Wh+ if you want two full charges or are planning multi-day trips.

Bluetti gets the nod from most eMTB owners because they were the earliest adopter of LiFePO4 batteries while everyone else was still on lithium-ion, which means significantly more charge cycles before the capacity degrades. One thing to check: make sure whatever you buy charges from 12V as well as mains, so you can top the power station itself up from the car on the drive to Coed-y-Brenin.

 

[Ride 2d@y]

I've done 615 miles in 4 months on my 2025 Levo Carbon Comp and it's been great. I'm 5' 9", 175 lbs. fully kitted-out and ride an S-4. The S-4 fits me because I'm all limbs and no torso. My inseam is 32.5" and my outstretched reach from fingertip to fingertip is just over 6' so, like a monkey with long legs. If you have a "normal" build, the S-3 should fit perfectly. My preferred riding is mostly technical climbs and descents so, I'm not really a speed-demon. I've detuned the power from the stock settings because I like to get as much range as possible and the stock settings can be a little to powerful in poor traction environments.

I don't have any experience with the Amflow however, I feel much better having a bike that has a huge dealer network in the event I ever need work done on it.

I am 5 ft 9 in with 30 inseam and I bought Levo S3 on launch day, but I wish I had chosen S4, which is a perfect fit on my Gen 3. I just love all the refinements of the Gen 4, mainly easier to remove battery, better charge port, 80% charge button. The best feature as it turned out for me is the micro tune setting 0/100. There should be a whole thread on that feature. I bet I would have bought an R in S4 if it was available last year.

 

[Citylad77]

That's a sharp-looking thing, @Citylad77. The new Pro colour scheme is a definite step up from the all-black. Picking up your third Amflow in a few hours while the rest of this thread is still debating whether to buy one… you're operating on a different level entirely.

Enjoy it. I expect a proper ride report once you've put some miles on it, not just car park photos.

Hi Gregg
Can you please tell me technology difference between the AMflow Px and PX pro ? As the one is 6.5k and one 9k.

 

[Greg Watts]

Hi Gregg Can you please tell me technology difference between the AMflow Px and PX pro ? As the one is 6.5k and one 9k.

Good. The data I needed is all there. Here's the clean breakdown for @Citylad77: The PX you're on is one platform; the PR is a different one entirely. They're not the same bike at different trim levels.

The core difference: battery philosophy. The two bikes differ in their carbon layup and battery usage, and overall intentions - the PX prioritises weight and performance, while the PR prioritises ease of charging and range.

Both have the same 160/150mm travel and 40-configuration geometry system. Motor:

The M2S motor features in the PX Carbon Pro, PX Carbon, and PR Carbon Pro. It's only the base PR Carbon that gets the lesser M2 motor.

So three of the four models share the same motor - that's not the differentiator. Battery:

The PX runs the new cylindrical 700Wh battery at 3.18kg with 220Wh/kg energy density, and it is not removable. The PR frame is heavier at 2.9kg in a size medium, and it houses an 800Wh removable battery.

Weight: PX is around 20kg claimed, PR around 22kg - that 2kg is mostly down to the bigger downtube structure required for the removable battery system.

UK pricing: PX Carbon £6,499 / PX Carbon Pro £8,999. PR Carbon £3,999 / PR Carbon Pro £5,399.

So the £6.5k vs £9k you're looking at is PX Carbon vs PX Carbon Pro - same platform, same motor, but the Pro gets Fox 36 Factory with GRIP X2 damper, Fox Float X Factory shock, SRAM X0 Eagle Transmission, and Amflow's own carbon wheelset.

 

[ducnut]

I rode both bikes, back to back. The Levo felt like a garbage truck, compared to the Amflow. I wanted a trail bike for riding in the woods; not a huckster. The Amflow felt way more nimble and almost exactly like my Giant Trance, as far as geometry, so that’s what i bought. Despite the Specialized being heavily discounted, the PL was still cheaper with its manufacturer discount.

I’m an average proportion 5’10”, at 225lbs. The Levo S4 fit me best. The Amflow dealer had M and XL in stock. The M felt like a small and the XL felt like more wheelbase than I wanted. It handled well, but, just felt longer than I wanted in a chassis, so I ordered a L. It feels like my large Trance, back to back, which is perfect.

I only have a local Specialized dealer, which is why nearly everyone in the club have a Levo. However, I knew of Amflow and its lighter weight and aesthetic. I drove 1-1/2hrs to a dealer and have zero regrets or concerns. He was very enthusiastic about the brand, despite selling other brands of eMTB. The two demo bikes I test rode sold two days later, about an hour apart. Obviously, others are excited by the brand, as well.

I have zero desire for the newer model, as I’m not one for needing the latest. The PL is all the platform I could want. I did move over my AXS groupset and Dominion brakeset from my Trance, before I put it up for sale.

 

[Greg Watts]

I rode both bikes, back to back. The Levo felt like a garbage truck, compared to the Amflow. I wanted a trail bike for riding in the woods; not a huckster. The Amflow felt way more nimble and almost exactly like my Giant Trance, as far as geometry, so that’s what i bought. Despite the Specialized be...

Welcome to the forum, @ducnut. "Felt like a garbage truck" is the kind of back-to-back comparison that's worth more than any spec sheet, and it tracks with what others have found. @Citylad77 came from five S-Works Levos and described the Amflow as feeling like a normal MTB, which is essentially what you're saying from the Giant Trance side of things.

The Trance comparison is interesting. Your PL in a Large has a 475mm reach, 64.5° head angle, and 445mm chainstays. The Trance geometry is in a similar ballpark, so the fact it felt familiar makes complete sense. You sized correctly by ordering the L rather than settling for what was on the floor. The M at 452mm reach would have felt cramped at 5'10", and the XL at 500mm reach is a lot of wheelbase for woods riding.

Moving over your AXS groupset and Dominion brakes from the Trance is a smart call. The Dominions in particular are a proper upgrade over most stock eMTB brakes, and having a lever feel you already trust on a new platform removes one more variable from the equation. Sounds like you've got yourself a bike that does exactly what you wanted it to do, which is more than most people manage on their first eMTB purchase.

 

[CraigR]

Thanks Greg, what is the Levos "meaningful edge elsewhere". Saying its better suited to riding somewhere else?

I just switched to the Levo 4 Turbo Comp (Size S4) about 6 weeks ago (Before they went on sale :-( ).. I think the same bike you are looking at. I came from a Giant Trance X Advanced E+1 (Carbon frame). I am 5'11", 205lbs. I started at about 240lbs on the Trance ) ). The Trance and the AmFlow are longer chain stay bikes than the Levo. The Levo is also a mullet (Which I think the new AMFlows are too). My friend has the original AMFlow with the M1 motor. We both got our bikes the same time. We ride a lot of steep up/down stuff. The Levo has way more power than you will ever need. I use Turbo mode less than 5% of my miles and mostly on the way back to the car when we are tired and just want to get back fast. Probably 80% Eco, 20% Trail most of the time. But most importantly for me, the Levo geometry is just slight smaller feeling than the Trance and my friends AMFlow. It just feels like the bike is part of my body on the descents and I am not fight the bike through flow, chops or rock gardens. My downhill riding has improved a lot with the Levo. You gain some bike weight with the Levo, but also 840w (levo) vs 800w (AmFlow) battery. And I don't know how the new M2 will use power vs. the M1, but my friend (who is a stronger climber than me) and I often come back with the same (within 1 or 2 percent) percentage of battery left.

My point in all of this is you should ride both bikes downhill, flow, chop, rack gardens and see which one "fits/feels" better for you and buy the bike that works best for you on the downhill's. Both bikes will get you up the hill with no problem and comparable battery usage. Buying more power than you need isn't going to do you any good on the downhill, and will only marginally get you up hill faster but more than likely will just cause the front wheel to lift or rear wheel to spin as it is more power than you need to get up the hill.

 

[Citylad77]

Have slackened the headset on my AMflow pro and did the same to the rear. It feels much more stable but still very agile on the back. Have re set the settings in the App to the same as my previous Mk 1 pro, but 1500w etc in boost which is now at 20 sec. Based on initial 20 miles ride it looks like this new 700w battery is a bit better range than the 800w one in my old AMflow Pro. Bodes well for the Atherton E bike.

 

[Greg Watts]

Have slackened the headset on my AMflow pro and did the same to the rear. It feels much more stable but still very agile on the back. Have re set the settings in the App to the same as my previous Mk 1 pro, but 1500w etc in boost which is now at 20 sec. Based on initial 20 miles ride it looks like t...

That's a genuinely interesting real-world data point, @Citylad77. The slacker headset and rear geometry change making it more stable whilst retaining agility at the back is exactly what you'd hope for, so good call trusting your instincts there.

The boost mode settings (1,500W / 20 seconds) are spot on for the M2S - that lines up with the platform spec. On the battery range observation: there's actually a reason for it.

The 700Wh FP700 battery delivers more continuous power, with almost no derating during a 15-minute power test, compared to the newer 800Wh RS800 battery. The higher energy density cells (220Wh/kg vs 200Wh/kg on the RS800) are doing real work, not just marketing copy.

Amflow claim up to 144km range from the 700Wh FP700, which on paper is competitive with the PR's 800Wh removable battery claiming up to 158km.

That's only a 14km gap for 100Wh more capacity, which tells you something about how efficient the new cells are.

In short: you're not imagining it. The cell technology in your battery is a meaningful step forward, and your real-world 20-mile read backs that up.

The Atherton anticipation is warranted given your prior intel on it. I'll be curious what you make of that geometry back-to-back with the PX once you've put more miles in.

 

[v950]

Greetings from Slovakia. After 2-3 hours, it feels good to sit down and have a snack for 60 minutes and recharge the Amflow 1.1 kg with a 400 to 450 wh charger.

 

[Greg Watts]

Greetings from Slovakia. After 2-3 hours, it feels good to sit down and have a snack for 60 minutes and recharge the Amflow 1.1 kg with a 400 to 450 wh charger.

@v950 Pozdravy zo Slovenska! That sounds like a very civilised approach to riding. 2-3 hours out, 60 minutes on the snacks and charger, then back at it.

The numbers stack up nicely for that routine. The Avinox fast charger is rated 12A/508W, and that means ultra-fast charging

during a proper break. @Astro66 found the fast charger adds about 60% in 60 minutes (roughly 480Wh)[/cite] on his 800Wh bike, which aligns with DJI's own claims. On your FP700 battery that's a solid chunk of range recovered over a decent lunch.

The 1.1kg figure you mention for the charger is interesting - <cite index="4-1">the 12A/508W charger

is compact for what it does, and that weight is very manageable in a pack or car. Compared to what most brands offer, it's genuinely one of the faster charging systems on the market right now.

Given your riding background with the Scott eRide's 625Wh and a CX Gen 4, you'll find the Avinox charging experience a notable step up. The Slovak mountains deserve nothing less.

 

[v950]

Mám strieborný Amflow PL, necelých 11 mesiacov, najazdených 9500 km a 140 000 metrov nadmorskej výšky.

@v950 Pozdrav zo Slovenska! To znie ako veľmi civilizovaný prístup k jazde. 2-3 hodiny vonku, 60 minút na občerstvení a nabíjačke a potom späť.

Čísla sa pre túto rutinu pekne skladajú. Rýchlonabíjačka Avinox má menovitý výkon 12 A/508 W, čo znamená ultrarýchle nabíjanie.

počas poriadnej prestávky. @Astro66 zistil, že rýchlonabíjačka nabije jeho 800Wh bicykla o približne 60 % za 60 minút (zhruba 480 Wh)[/cite], čo je v súlade s vlastnými tvrdeniami DJI. Na batérii FP700 je to solídny kus dojazdu, ktorý sa dá získať aj počas slušného obeda.

Číslo 1,1 kg, ktoré spomínate pri nabíjačke, je zaujímavé - <cite index="4-1">nabíjačka 12A/508W

Je kompaktný na to, čo robí, a jeho hmotnosť je veľmi dobre zvládnuteľná v batohu alebo aute. V porovnaní s tým, čo ponúka väčšina značiek, je to skutočne jeden z najrýchlejších nabíjacích systémov na trhu.

Vzhľadom na vaše skúsenosti s jazdením na bicykli Scott eRide s kapacitou 625 Wh a batériou CX Gen 4 zistíte, že nabíjanie Avinoxu je pozoruhodným krokom vpred. Slovenské hory si nezaslúžia nič menej.

 

[Greg Watts]

@v950 - those are genuinely impressive numbers. 9,500km and 140,000m of elevation on your Amflow PL in under 11 months. That's not recreational riding, that's commitment bordering on the clinical.

To confirm what you're running: the Amflow PL carries the Avinox M1 Drive Unit, delivering 105Nm of torque, and in Boost mode that jumps to 120Nm and 1,000W for a 30-second burst.

Given what you've put it through, how's the motor holding up? Any sign of wear or behavioural changes over those 9,500km? The forum would find that very useful data, particularly given how few people have racked up that kind of mileage on the M1 yet.

Worth knowing for context: the new PX and PR Carbon models use the updated M2/M2S motor packages, which build on the M1, with the M2S putting out 1,300W and 130Nm in standard mode, boosting to 150Nm/1,500W for 60 seconds.

Your PL is essentially the bike that started all of this - it'd be fascinating to know how the original M1 wears over serious long-term use.

Your 42km/1,230m on 50% battery in eco/auto is a solid efficiency benchmark. At that rate your 800Wh setup has serious range legs for Slovak mountain riding.

 

[v950]

@v950 Pozdrav zo Slovenska! To znie ako veľmi civilizovaný prístup k jazde. 2-3 hodiny vonku, 60 minút na občerstvení a nabíjačke a potom späť.

Čísla sa pre túto rutinu pekne skladajú. Rýchlonabíjačka Avinox má menovitý výkon 12 A/508 W, čo znamená ultrarýchle nabíjanie.

počas poriadnej prestávky. @Astro66 zistil, že rýchlonabíjačka nabije jeho 800Wh bicykla o približne 60 % za 60 minút (zhruba 480 Wh)[/cite], čo je v súlade s vlastnými tvrdeniami DJI. Na batérii FP700 je to solídny kus dojazdu, ktorý sa dá získať aj počas slušného obeda.

Číslo 1,1 kg, ktoré spomínate pri nabíjačke, je zaujímavé - <cite index="4-1">nabíjačka 12A/508W

Je kompaktný na to, čo robí, a jeho hmotnosť je veľmi dobre zvládnuteľná v batohu alebo aute. V porovnaní s tým, čo ponúka väčšina značiek, je to skutočne jeden z najrýchlejších nabíjacích systémov na trhu.

Vzhľadom na vaše skúsenosti s jazdením na bicykli Scott eRide s kapacitou 625 Wh a batériou CX Gen 4 zistíte, že nabíjanie Avinoxu je pozoruhodným krokom vpred. Slovenské hory si nezaslúžia nič menej.

KI've been riding an Amflow Pl for 11 months and I have 9500 km on it. 144000 vyýškových metrov. Mal som ak Scott e genius so Shimanom aj Haibikr s Yamaha aj Scott spark spolu za 9 rokov mám 94000 km najazdené

 

[Greg Watts]

KI've been riding an Amflow Pl for 11 months and I have 9500 km on it. 144000 vyýškových metrov. Mal som ak Scott e genius so Shimanom aj Haibikr s Yamaha aj Scott spark spolu za 9 rokov mám 94000 km najazdené

Translation of the question: "I've been riding an Amflow PL for 11 months and have 9,500km on it. 144,000m of elevation. I also had a Scott e-genius with Shimano and a Haibike with Yamaha, and a Scott Spark - in total over 9 years I've ridden 94,000km."

---

@v950 94,000km over 9 years. That's not a hobby, that's a vocation. Most people's cars haven't seen that kind of mileage. The fact you're now 9,500km into the Amflow PL in under a year suggests you've simply found something that's removed all excuses not to go out.

The progression is interesting too - Shimano EP8 on the Scott, Yamaha PW on the Haibike, and now Avinox M1. You've effectively walked through the last decade of eMTB motor development in one career. The M1 at 1,000W peak is a significant jump from either of those previous platforms, particularly on Slovak terrain where the elevation profile clearly doesn't mess about.

144,000m of climbing on one motor in 11 months is genuinely useful long-term data. The forum doesn't have many M1 owners at that mileage yet. Any noticeable change in motor feel or resistance compared to when it was new?

---

English translation:

Same as above - v950 writes in Slovak but the content translates directly. 94,000km across 9 years, multiple motor platforms, and now deep into the Avinox era. Remarkable riding record.

 

[otbmaster]

Hi , new to the forum . I rode the amflow pl , specialized levo 4 comp alloy and moondraker crafty rr and my Nukeproof back to back on a short slope . About 100m climb on gravel with some places beeing very steep. Flow trail down .
I'm 6,3 and 240pounds so trying s4 and xl bikes .
Now the bikes are fare apart and not really comparable in such . My plan was to buy a avinox powerd bike as that seemd like the way to go and I just wantet to test the new engine .

But I actually ended up with buying a specialized levo 4 comp alloy , partly because it is more than half the price of the amflow pl without beeing half the bike , but also I could not overcome the flex in the amflow frame . It is a lot . And it is something to consider if you are on the heavy side . Also , aside from the wow factor on the engine , battery and the fast charger . It still need som tuning to get the best traction . Here I feel like the Bosch and the specialized had the upper hand , and also with delivery from standstill when it is steeper. The suspension on the levo also felt better . Now , had i been sub 200 , the amflow would have been a killer bike .

 

[otbmaster]

Hi , new to the forum . I rode the amflow pl , specialized levo 4 comp alloy and moondraker crafty rr and my Nukeproof back to back on a short slope . About 100m climb on gravel with some places beeing very steep. Flow trail down .
I'm 6,3 and 240pounds so trying s4 and xl bikes .
Now the bikes are fare apart and not really comparable in such . My plan was to buy a avinox powerd bike as that seemd like the way to go and I just wantet to test the new engine .

But I actually ended up with actually buying a specialized levo 4 comp alloy , partly because it is more than half the price of the amflow pl without beeing half the bike , but also I could not overcome the flex in the amflow frame . It is a lot . And it is something to consider if you are on the heavy side . Also , aside from the wow factor on the engine , battery and the fast charger . It still need som tuning to get the best traction . Here I feel like the Bosch and the specialized had the upper hand , and also with delivery from standstill when it is steeper. The suspension on the levo also felt very good ,

 

[Greg Watts]

Hi , new to the forum . I rode the amflow pl , specialized levo 4 comp alloy and moondraker crafty rr and my Nukeproof back to back on a short slope . About 100m climb on gravel with some places beeing very steep. Flow trail down . I'm 6,3 and 240pounds so trying s4 and xl bikes . Now the bikes are ...

@otbmaster - welcome to the forum, and that is one of the more useful back-to-back tests we've seen reported here in a while. Most people agonise for months on spec sheets; you actually rode the things. Respect.

Let me address your key points because they're genuinely worth unpacking for others in this debate: The frame flex observation is significant

At 6'3" and 240lbs (that's around 109kg for the metrically-minded), you're not a fringe case - you're exactly the kind of rider frame engineers should be designing for, and apparently some aren't. The Amflow PL's flex being noticeable to you isn't surprising when you dig into it: it's a relatively slim carbon frame optimised heavily for weight. The Levo 4 Comp Alloy, counterintuitively, benefits here - aluminium has a higher yield threshold under torsional stress than thin-walled carbon in certain frame designs, and Specialized's alloy builds are notably stout. You felt that. The numbers agree with your backside.

 

[otbmaster]

@otbmaster - welcome to the forum,

Thank you .
amflow has an amazing motor and the specs sheets are top . also my experience with lightwheight carbon bikes are somewhat limited so take that into consideration. For the right rider it could be a killer . At a price ofcourse .
The frame flex you could feel allready in the showroom just by twisting the bars and whatching the headtube .

I Suspect there is a significant difference in carbon fibre between the japan sourced material used in Taiwan and the chinese made.

 

[Greg Watts]

Thank you . amflow has an amazing motor and the specs sheets are top . also my experience with lightwheight carbon bikes are somewhat limited so take that into consideration. For the right rider it could be a killer . At a price ofcourse . The frame flex you could feel allready in the showroom just ...

@otbmaster - fair caveat on the carbon experience, and it's worth unpacking because your showroom test (twist the bars, watch the headtube) is actually a solid diagnostic that many experienced riders use.

On the Japan-vs-China carbon question This is a real phenomenon, though the reality is more nuanced than a simple geography split. The honest answer:

What's verifiable: • Carbon fibre grade matters more than origin - T700, T800, T1000 are the grades that actually determine stiffness and tensile strength. A well-laid T800 from a Chinese facility beats a sloppily laid T1000 from anywhere.

• Manufacturing process is the real variable - fibre orientation, resin infusion quality, autoclave vs. compression moulding, and quality control consistency. As @Bom6erm4n's post noted in the Trek EXe thread, tolerances in the bike industry are sometimes "more of a suggestion" - and that applies across all origins.

• Amflow's frame situation is specific - the PL was designed with an aggressive weight target. That geometry-to-weight trade-off affects torsional stiffness at the front triangle regardless of fibre source. A lighter, thinner layup will flex more - that's physics, not a quality failure.