Is it possible to upgrade chainring on Allant+ 8? Looks like this one comes with a Prowheel 40t Narrow/Wide Steel?

[Gee_Whiz]

Will the 46t from the +8s fit? Any other options? Wolftooth etc?

 

[BlackHand]

I think you'll get better advice if you tell us what you're trying to accomplish with the upgrade. Are you spinning out now at 20mph?

 

[Gee_Whiz]

I'm just wanting to upgrade from a 40t as anything under 44t tends to spin out in my experience

 

[TrailSeeker]

I have the same problem, I find the gearing is too loose and there's not enough resistance to pedaling even in 9th gear. I'm not sure what to call it but it makes it spin out and raises your cadence.

I'd be curious as well.

 

[California Flash]

Will the 46t from the +8s fit? Any other options? Wolftooth etc?

Checking the Trek archives, model years 2020, 2021, 2022 come with a 46T chainring and a 42 tooth cassette. I have a 2021 Allant 8s + and have added a 40T chainring and a Shimano M4100 11-46T cassette. This setup works perfectly for my needs. I needed the lower gearing as I live in a valley here in Michigan and there are grades up to 11% to leave the valley. If you are not in a hurry, gearing down increases the cadence which requires less boost from the motor resulting in less battery use and greater range. In warmer weather I typically average 15 mph moving average which translates into an average projected range of 55 miles. My longest actual ride so far was 52.49. The statistics from the Bosch system indicated that the remaining battery distance was 9 miles which should yield a hypothetical range of 61.49 miles. The remaining battery percentage indicated was 21%.

 

[Akrotiri]

Checking the Trek archives, model years 2020, 2021, 2022 come with a 46T chainring and a 42 tooth cassette. I have a 2021 Allant 8s + and have added a 40T chainring and a Shimano M4100 11-46T cassette. This setup works perfectly for my needs. I needed the lower gearing as I live in a valley here in Michigan and there are grades up to 11% to leave the valley. If you are not in a hurry, gearing down increases the cadence which requires less boost from the motor resulting in less battery use and greater range. In warmer weather I typically average 15 mph moving average which translates into an average projected range of 55 miles. My longest actual ride so far was 52.49. The statistics from the Bosch system indicated that the remaining battery distance was 9 miles which should yield a hypothetical range of 61.49 miles. The remaining battery percentage indicated was 21%.

Did you keep the same derailleur when switching to the 46t cassette or get a SGS version of the stock derailleur?

 

[California Flash]

Did you keep the same derailleur when switching to the 46t cassette or get a SGS version of the stock derailleur?

Yes, which is the Shimano Deore M5120, long cage.