Why do some bike shops make you feel like an immediate inconvenience to their existence when you walk in lmao. I know there’s good shops, but man there’s a lot of bad ones. I do all my own bike work now and have never looked back. It’s just sad man. I almost prefer direct to consumer style now and I’ll just deal with the downtime of shipping anything needing warranty back. A lot of times that way is still faster than the bike shops dealing with it.
Avinox M2s rattle
- Thread starter Rob209
- Start date
- Thread starter
- #32
I feel the same, I do all my own bike work & don’t really like giving my bike to someone less skilled to carry out warranty work. I’ve had some pretty poor warranty jobs done over the years that I’ve had to put right myself. Not saying they’re all bad but from personal experience the work I have had done hasn’t been great.
Did you buy it on a credit card? If so you have some protections through that for the first month. Might be able to just dump the bike back at the shop and claim it all back through the credit card company. If nothing else it will probably change the shop's attitude instantly.
My bike was kind-of fixed so don't need to return it. Really poor service from the store though but it was staffed by kids!
banger2891
New Member
- Apr 9, 2026
- 1
- 1
I can tell you the quality control is anything but thorough. My 2026 level rr came with significant play in the linkage. Took hours for me to come to the conclusion the main pivot bolts were a fraction of a millimetre too long so were not preloading the bearings. Had to put a 1mm washer on each one. Of the four bolts holding the stem faceplate on, 2 were missing washers. And the setup key in the rear derailleur was in position B instead of A which meant the clutch wasn’t pulling as tight as it should resulting in poor shifting and considerable chain slap. Every bearing on the frame and wheels were shot within 3 months. Just had to change the headset bearings and the headtube is measuring smaller than it should so the bearings are being squeezed tight. Don’t let the video propaganda fool you, they have no better quality control than anyone else. Just because they have a fancy factory doesn’t mean the guy assembling the bike gives a sh**.
mastervier
New Member
- May 9, 2026
- 2
- 6
Mine m2s Startet also to rattle last ride.
I have done 1000km and 37000 vertical Meters in the last 4 weeks. It has super silent so the rattle ist now really annoying.
Please keep us updatet. I will check with my dealer If a fix via warranty is possible.
I have done 1000km and 37000 vertical Meters in the last 4 weeks. It has super silent so the rattle ist now really annoying.
Please keep us updatet. I will check with my dealer If a fix via warranty is possible.
164 mm
slickrock
Well-known member
A thousand klicks in just 4 weeks is a lot usage and the kind of use case that could foreshadow long-term M2S behavior:
- How many klicks did you start to notice the rattle?
- How many total klicks on the motor (i.e. any miles put on before the last 4 weeks)?
- Was it sudden onset or realization?
- Has it reached a steady state rattle level? Do you think it will get worse?
- What about other motor performance, like power delivery, mechanical latency, etc? Motor hum when pedaling getting worse?
- What bike are you riding?
- What style of riding? Mostly downhill? Max-powered uphills? Ginger or aggressive bike rider?
- Let use know if your bike vendor is hedging that is not a warranty issue since the motor still technically functions.
The rattling issues are definitely present. It would be interesting to know if there are other people who have already driven 1,000 km and haven't experienced any problems. While people here are posting about unresolved issues, what about the others who *don't* have any problems with it? Surely there must be many more of them.
Can someone please point out where Avinox mentioned that M2S is rattle-free? Or rattle-free being as a selling point or "new feature" over M1 ... Have they even officially addressed/confirmed rattle in M1? I know it's being mentioned by almost every influencer out there, but did Avinox said/write anything about that? Because if not, they will simply say or write on their website that this sound is considered being normal with this motor and no warranty will cover it ... Because if it will became a broader problem, maybe they could not fix this problem in current form factor, so even warranty will not save you ... They could only replace the motor and then you will get rattle again over time with each new motor ... Something similar happened with Brose motors failing on Gen2/3 Levos, where some had replaced 5+ motors, Spesh even admitted the problem and extended motor warranty on some models for additional 2 years ...
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mastervier
New Member
- May 9, 2026
- 2
- 6
The rattling startet after ~900km
Its an Amflow PX. The bike ist only 4weeks old.
The rattling startet suddenly. One ride was total quiet. The next ride started with rattling.
I hope its not become worse but its too early to tell. Apart from that the bike ist totally quiet. (did a mod for ratteling Brake Pads and added zip ties for better cable management)
Power, noise etc hasnt changed. Apart from the ratteling it feels like the first ride.
I use it only for trails. Mostly a bit steeper and rocky.
Most of the time with Low to medium Support (to match a Fazua or Bosch cx4) 25% full Power Rides.
Im more on the faster side but not super aggressive. I dont break so much stuff as I did in the past when my riding style was more aggressive. trying to take advantage of the playfullness an Amflow offers compared to a big enduro rig and ride smarter lines.
--
www.avinox-ebike.com
Despite the increased power, noise is kept to a minimum, with the drive systems operating with a sound pressure level of ≤ 45 dBA.1 The Avinox M2S eliminates gear play and pedal kickback noise with a dual-gear meshing design, and the Avinox M2 uses helical gears to reduce knocking or rattling sounds, even on rough terrain.
Avinox Drive System gewinnt den Design & Innovation Award 2025
22. Januar 2025 – Avinox hat den Design & Innovation Award 2025 für sein revolutionäres Avinox-Antriebssystem erhalten, das während der Eurobike 2024 sein Debüt feierte.
Ok great, just in case I saved a screenshot for future reference--
Despite the increased power, noise is kept to a minimum, with the drive systems operating with a sound pressure level of ≤ 45 dBA.1 The Avinox M2S eliminates gear play and pedal kickback noise with a dual-gear meshing design, and the Avinox M2 uses helical gears to reduce knocking or rattling sounds, even on rough terrain.
Avinox Drive System gewinnt den Design & Innovation Award 2025
22. Januar 2025 – Avinox hat den Design & Innovation Award 2025 für sein revolutionäres Avinox-Antriebssystem erhalten, das während der Eurobike 2024 sein Debüt feierte.
Reduced comparing to what? M1?
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The 'dual gear mesh design' I assume uses a spring mechanism to apply that spring pressure that takes up the gear slack.
With enough motor use, possibly the spring pressure reduces as the spring mechanism itself becomes fatigued, and therefore rattle increases.
I would not expect Avinox to warranty a rattle since they never explicitly stated the rattle was completely eliminated.
With enough motor use, possibly the spring pressure reduces as the spring mechanism itself becomes fatigued, and therefore rattle increases.
I would not expect Avinox to warranty a rattle since they never explicitly stated the rattle was completely eliminated.
slickrock
Well-known member
That it's a PX is huge, as it's straight from the horse's mouth and Amflow will be forced to deal with this head-on. It will be a PR nightmare for them if they don't consider it a warranty issue, as the M2S has mechanic tech to specifically address motor rattle (i.e. mesh gear), whereas the M2 does not. It's interesting that it started suddenly, perhaps pointing to a defect rather than some wear condition that didn't come out in mule testing.
It's important that you keep us posted on this with Amflow, as other folks having deal with Avinox via Mondraker are going to have a harder time.
Entonox
Member
That states the M2S has eliminated kickback noise. And the M2 has reduced knocking or rattling sounds.
ozzybmx
Active member
You need to convince the LBS you bought it from to agree and send it through as a warranty issue.
I've had a bike shop tell me there's nothing wrong even after producing the email from the manufacturer agreeing that there was an issue.
Any wonder we do stuff ourselves and try and avoid shops.
Bike Gorilla
Active member
Avinox have ploughed a lot of money in to the marketing for this motor, be that through influencers or sponsored bike tests with one of the headlines being “ there’s no knocking sound like the M1” or “the bike is silent on descents” dropped in to the videos/podcast reviews as a feature/upgrade. A clacking motor on descents in a complete turn off for most riders these days. The reviewers did a good job of not mentioning a clacking noise for the M1. I didn’t know it had on until I read this string.
They inferred it was sorted and it’s not. They need to sort a new motor for th OP.
They inferred it was sorted and it’s not. They need to sort a new motor for th OP.
Bike Gorilla
Active member
I won’t bother going through all of the reviews for the motor, but the ones I’ve watched, the reviewers have all said it’s silent on the descents, which isn’t the case for all the owners it seems.
Avinox themselves never claimed the M2S is completely rattle-free.
The comparison table floating around recently actually shows this pretty clearly.
- Avinox M1: “Noticeable rattle”
- Avinox M2: “Much quieter”
- Avinox M2S: “Quietest”
- Bosch CX Gen 5: “None”
I also noticed in the very first reviews that most influencers were extremely careful with the wording when talking about the rattle. They usually said the bike “feels very quiet” or that the noise was “greatly reduced,” but almost nobody clearly stated that the motor was completely rattle-free. Those are two very different things.
I feel sorry for some of the early adopters of the system. I was very close to becoming one myself, but I stayed skeptical and decided to wait and see how things develop in real-world riding before jumping in.
The comparison table floating around recently actually shows this pretty clearly.
- Avinox M1: “Noticeable rattle”
- Avinox M2: “Much quieter”
- Avinox M2S: “Quietest”
- Bosch CX Gen 5: “None”
I also noticed in the very first reviews that most influencers were extremely careful with the wording when talking about the rattle. They usually said the bike “feels very quiet” or that the noise was “greatly reduced,” but almost nobody clearly stated that the motor was completely rattle-free. Those are two very different things.
I feel sorry for some of the early adopters of the system. I was very close to becoming one myself, but I stayed skeptical and decided to wait and see how things develop in real-world riding before jumping in.
When I saw the plastic(probably delrin material)mesh gear for the 1st time, my initial thought was 》Wow great idea, but why so thin? It looks like maybe only 3-4mm thick. How is the durability going to be, Is is going to last or will it need replacements after a while. Then I thought, well probably they did some testing and got to a conclusion it's fine.
Delrin is a phenomenal thermoplastic material with great properties that acts as a replacement for metal parts, that works fine between -40°C to 80°C with peaks up to 120°C.
When I saw Velomotion's test of the M2S, it clicked right away, when they showed the derating test. The M2S unit's housing was measured at a whopping 120°C at that test. That means the internals were at even higher temps.
Could it be that the delrin mesh gear doesn't hold up to the internal temps at high loads and get twisted and jammed due to being that/to thin? Or is there some other problem with the implementation of the gears spring loding mechanism that gets jammed.
Edit: Another thought is on lube, at high temperature lube starts to flow, could the lube that was on the main gear have gone between the plastic mesh gear and the main one and when the motor cooled down thickened back to original thick state and glued the gears together with surface tension and the spring loading mechanism isn't strong enough to loosen them.
With this mesh gear on the M2S they were solving the rattle at the crankshaft main gear(the big one). So going back to the M1, that gear was my suspect on the M1, as it was straight cut there, but the M1 apparently also had a rattle inside of the sun/planet gearset as Rob mentioned when he had a preproduction unit. Could that be it on this M2S? Who knows...
Delrin is a phenomenal thermoplastic material with great properties that acts as a replacement for metal parts, that works fine between -40°C to 80°C with peaks up to 120°C.
When I saw Velomotion's test of the M2S, it clicked right away, when they showed the derating test. The M2S unit's housing was measured at a whopping 120°C at that test. That means the internals were at even higher temps.
Could it be that the delrin mesh gear doesn't hold up to the internal temps at high loads and get twisted and jammed due to being that/to thin? Or is there some other problem with the implementation of the gears spring loding mechanism that gets jammed.
Edit: Another thought is on lube, at high temperature lube starts to flow, could the lube that was on the main gear have gone between the plastic mesh gear and the main one and when the motor cooled down thickened back to original thick state and glued the gears together with surface tension and the spring loading mechanism isn't strong enough to loosen them.
With this mesh gear on the M2S they were solving the rattle at the crankshaft main gear(the big one). So going back to the M1, that gear was my suspect on the M1, as it was straight cut there, but the M1 apparently also had a rattle inside of the sun/planet gearset as Rob mentioned when he had a preproduction unit. Could that be it on this M2S? Who knows...
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Wojtek
New Member
- Mar 13, 2026
- 95
- 89
Motor rattle fix has been one of major upgrades and decision factors for me - far more important than power/torque increase.
There was one youtube video with an avinox person talking about the motor - need to find and rewatch it.
But now i need a clear answer from Avinox to say whether it was resolved.
What means "reduced"??? Less than on m1? By how much? Some m1s dont have rattle.
It is all quite bizarre right now and would be good to have avinox step in.
If i bought the bike, i would have felt a bit deceived. Because the hype was created using lack of rattle as major selling point.
There was one youtube video with an avinox person talking about the motor - need to find and rewatch it.
But now i need a clear answer from Avinox to say whether it was resolved.
What means "reduced"??? Less than on m1? By how much? Some m1s dont have rattle.
It is all quite bizarre right now and would be good to have avinox step in.
If i bought the bike, i would have felt a bit deceived. Because the hype was created using lack of rattle as major selling point.
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