I am trying to decide what to buy. I am 105kg and 6’5. I want at least 120nm tq. Would an amflow give me enough range or should I consider the trek rail.
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Amflow vs Trek Rail for a 105kg/6'5" rider — enough range and 120Nm torque?
- Thread starter hvrider
- Start date
At 105kg and 6'5", a couple of things shape this decision before we even get to the torque headline.
Torque
Both clear your 120Nm bar, but in different ways:
• DJI Avinox M2 (Amflow PL Carbon): 110Nm nominal, 125Nm in Boost (≤60s), 1100W peak. Measured ~1176W on the dyno.
• Bosch CX Gen 5 (Trek Rail+): 120Nm sustained post-Performance Update 2.0, 750W peak, ~680W measured.
The Amflow has noticeably more grunt on tap, especially the burst figure. For a 105kg rider that headroom is genuinely useful on steep tech climbs — you're asking more of the motor than an 75kg rider does.
Range — this is where it gets interesting
Bigger rider = more Wh per metre climbed. Real numbers from the forum:
• Amflow 800Wh: @Jazzii (80kg kitted) got 45km / 1800m vert mixed modes. @jam56 at 110kg got ~60km in Auto. → Jazzii's data
• Bosch Gen 5 600Wh: @Plummet (80kg) got 23km / 913m mostly in 85Nm eMTB mode, finishing at 4%. 0.43Wh/m. → Plummet's data
The Trek Rail+ comes with 800Wh, not 600Wh — that changes the equation significantly versus Plummet's test bike. At your weight, expect roughly 30-35km / 1200-1400m on the Rail+ in eMTB mode, and 45-55km / 1500-1800m on the Amflow in mixed modes. Push the Avinox hard in Turbo and that gap closes — @Rob Rides EMTB has shown Avinox at Bosch-level power (~600W) is similarly efficient; it's only thirsty when you exploit the full 1100W. → Rob's notes
The honest pick
• If you want the most power and the lighter bike (Amflow PL Carbon is ~19-22kg vs Trek Rail+ at 23.8kg) and you'll modulate modes sensibly — Amflow. More motor, comparable real-world range thanks to the same 800Wh pack and lower system weight to haul.
• If you want UK dealer support, proven warranty network, and a burlier 160/160 enduro chassis with a 64.5° HA — Trek Rail+ at £5000 is exceptional value.
At 6'5" you'll want the Rail+ in 19.5" (490 reach, 645 stack). Confirm Amflow sizing — the L typically tops out around 480-485 reach, so check the XL if it exists in your market.
What's your typical ride profile — long alpine days or shorter punchy laps? That tips it.
Torque
Both clear your 120Nm bar, but in different ways:
• DJI Avinox M2 (Amflow PL Carbon): 110Nm nominal, 125Nm in Boost (≤60s), 1100W peak. Measured ~1176W on the dyno.
• Bosch CX Gen 5 (Trek Rail+): 120Nm sustained post-Performance Update 2.0, 750W peak, ~680W measured.
The Amflow has noticeably more grunt on tap, especially the burst figure. For a 105kg rider that headroom is genuinely useful on steep tech climbs — you're asking more of the motor than an 75kg rider does.
Range — this is where it gets interesting
Bigger rider = more Wh per metre climbed. Real numbers from the forum:
• Amflow 800Wh: @Jazzii (80kg kitted) got 45km / 1800m vert mixed modes. @jam56 at 110kg got ~60km in Auto. → Jazzii's data
• Bosch Gen 5 600Wh: @Plummet (80kg) got 23km / 913m mostly in 85Nm eMTB mode, finishing at 4%. 0.43Wh/m. → Plummet's data
The Trek Rail+ comes with 800Wh, not 600Wh — that changes the equation significantly versus Plummet's test bike. At your weight, expect roughly 30-35km / 1200-1400m on the Rail+ in eMTB mode, and 45-55km / 1500-1800m on the Amflow in mixed modes. Push the Avinox hard in Turbo and that gap closes — @Rob Rides EMTB has shown Avinox at Bosch-level power (~600W) is similarly efficient; it's only thirsty when you exploit the full 1100W. → Rob's notes
The honest pick
• If you want the most power and the lighter bike (Amflow PL Carbon is ~19-22kg vs Trek Rail+ at 23.8kg) and you'll modulate modes sensibly — Amflow. More motor, comparable real-world range thanks to the same 800Wh pack and lower system weight to haul.
• If you want UK dealer support, proven warranty network, and a burlier 160/160 enduro chassis with a 64.5° HA — Trek Rail+ at £5000 is exceptional value.
At 6'5" you'll want the Rail+ in 19.5" (490 reach, 645 stack). Confirm Amflow sizing — the L typically tops out around 480-485 reach, so check the XL if it exists in your market.
What's your typical ride profile — long alpine days or shorter punchy laps? That tips it.
- Thread starter
- #3
@Greg Watts . If I only ride both bikes in turbo mode, how much range would I expect
@hvrider - Perth changes the picture quite a bit, so let me recalibrate. The price gap is significant
$6,999 vs $9,999 AUD is a $3,000 difference - that's not trivial. Before going further, I need to flag something: I mentioned the Amflow PL Carbon in my previous post, but I need to be precise about which Amflow you're actually looking at for $9,999 AUD. I'll address that below.
Which Amflow is the "base model" at $9,999? The Amflow lineup is PL → PR → PL Carbon → PR Carbon → PR Carbon Pro, each with different motors. I'd want to confirm exactly which model you're being quoted before advising on torque - the motor varies significantly by model. Can you confirm the exact model name from the dealer? That matters before I tell you whether it clears your 120Nm bar.
Trek Rail+ 5 Gen 5 at $6,999 - what you're getting The Rail+ 5 runs the Bosch CX Gen 5. With Performance Update 2.0 (May 2026 OTA), that motor now delivers 120Nm - so it hits your minimum exactly. Manufacturer-quoted peak is 750W; independently measured at ~680W on ebike-lab's dyno.
The Rail+ 5 is the entry spec in the range - I'd check what components you're getting at that price point (brakes, dropper, wheels) before signing off on it.
Perth trails - relevant context Kalamunda and the Goat Farm are predominantly sandy hardpack XC terrain. You're not doing 2,000m alpine days - you're doing punchy, repeated laps on well-draining trails. In that context, 800Wh is ample for either bike and range anxiety isn't really the issue. The $3k price gap becomes harder to justify purely on power, because Perth riding won't stress either motor to its limits.
Sizing - still need to confirm At 6'5" you'll be at the top of the size range on either bike. I'd strongly recommend sitting on both in-store before committing - confirm reach and stack for the largest size available on whichever Amflow you're quoted.
What's the exact Amflow model name on the quote?
- Thread starter
- #5
@Greg Watts It would be the PX carbon in xxl for $9,999.
How important is it that I buy locally? I am competent working on my analogue bike, but unfamiliar dealing with electric motors, batteries, wires. I’m also concerned about warranty issues.
If I consider buying online, I could also look at Teewing, Velduro, Commencal in Australia.
Other question, as a first time e-bike purchase in May 2026, should I only consider an Avinox M2S equipped bike. Is everything else outdated now?
Good questions - let me work through them properly.
1.
Buying locally vs online - for a first eMTB buyer
The community consensus here is unusually consistent.
These aren't wrench problems; they're dealer-and-laptop problems.
That's an extreme case, but it illustrates the point: when something goes wrong (and first-time owners disproportionately hit teething issues), you want a local dealer who can plug in diagnostics and swap parts, not a freight dispute with an online seller.
buying local is strongly advisable.
2.
The Amflow PX Carbon - motor clarification
I need to be precise here.
My verified data confirms:
•
Amflow PX Carbon uses the
• Battery:
3.
Is M2S (on the PX) the only motor worth considering in May 2026? Not quite, but it is the current peak.
The realistic hierarchy:
•
•
•
The Bosch CX Gen 5 isn't "outdated" - it's a mature, well-supported platform.
But the Avinox M2S is objectively more capable, and at your weight you'll notice the headroom.
4.
Teewing, Velduro - honest answer I don't have verified data on either brand's Australian support network, warranty terms, or dealer coverage to advise you confidently.
Bottom line: PX Carbon clears every bar you set.
But given your stated profile - first eMTB, warranty concerns, not familiar with motor systems - buy from a local Perth dealer who can actually support you.
- Thread starter
- #7
@Greg Watts what are common issues with the Bosch CX Gen 5? Have there been many warranty cases?
@hvrider - good question, and one worth separating into two parts: the Gen 5 motor's own reliability record, and Bosch's warranty/support ecosystem. Bosch CX Gen 5 - known issues
The Gen 5 (Smart System era) is a relatively mature platform now. The most commonly reported issues across the community:
• Error 503/504 - motor malfunction and speed sensor errors respectively. 503 often resolves with a reset or sensor realignment; persistent cases typically need a dealer diagnostic and occasionally a motor swap under warranty
• Low-speed rattle/click - reported by various owners, particularly in cold conditions. Often normal clutch behaviour; sometimes improves after firmware update
• Mini remote strap failure - @Brawwp's post flagged this as a known weak point; zip ties have become an unofficial fix while awaiting warranty replacements. Minor but annoying
• Motor management changes via OTA - the CX Gen 5 has had three torque figures since launch (85Nm → 100Nm → 120Nm via PU2.0 in May 2026). That's actually a positive story - free upgrades - but it does mean early owners had a different experience to current spec
What's not a significant issue: Bosch motor longevity is generally strong. @Swissrider's post notes a 2017 CX motor past 6,000km still running fine - Bosch motors are serviceable and parts-supported long-term.
Warranty I won't state a specific warranty duration without confirming it for the Australian market - Trek AU's terms may differ from EU. Worth asking the dealer directly: what's covered, for how long, and who performs the work (Trek-authorised dealer or Bosch directly).
Bottom line The CX Gen 5 isn't problem-free, but it has a well-established service network, dealer tooling, and a track record that the Avinox simply doesn't have yet at scale. For a first-time eMTB buyer with warranty concerns, that matters.
You should consider the Rail+ that's 11K in AUS - you only have to stretch 1K more than the Amflow base, but the spec is very nice on that bike.
There's plenty of Amflow vs the world threads. I'm not trying to start another one. But I just bought new bike (Orbea Wild) with a Bosch Gen 5. Here's why I didn't go Amflow - personally:
- The Avinox can rattle. For some, it rattles a LOT. This is non-issue with Bosch. There are threads about it.
- The Avinox is not more efficient. I can empty a battery with the Bosch at 750w/100nm in 2 hours. So what need is there for more power, if there is not capacity?
- The Bosch pedals freely past the cutout, the Avinox has plenty of resistance (reportedly)
The Avinox is an excellent motor, the rattle steers me clear, and I got $4.5K off my Wild's RRP (ex-display though, got lucky).
The others motors still work, just fine, and there isn't battery capacity to drive more power than the Bosch puts out - IMHO. I'll wait for the non-rattley Avinox bike, or the Bosch Gen 6.
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