←back to thread

Rivian's TM-B electric bike

(www.theverge.com)
190 points hasheddan | 8 comments | 22 Oct 25 18:00 UTC | HN request time: 1.19s | source | bottom
Show context
jlhawn ◴[22 Oct 25 19:04 UTC] No.45673660[source]▶
a full suspension e-bike, 500+Wh battery, with a belt drive for $4,500 is honestly a really good deal. There is a shortage of options when it comes to full-suspension bikes that are good for commutes. Compare this to any e-bike with the Bosch e-bike system. The big risk here for consumers if whether they can match the service, support, and reliability that Bosch has. There appears to be a class-2 e-bike option which is something that significantly differentiates it from bikes with the Bosch system.
replies(7): >>45673748 #>>45673862 #>>45673947 #>>45674140 #>>45675827 #>>45678184 #>>45678264 #
1. antinomicus ◴[22 Oct 25 19:25 UTC] No.45673947[source]▶
The article clearly states it’s class 3.
replies(1): >>45673981 #
2. jlhawn ◴[22 Oct 25 19:27 UTC] No.45673981[source]▶
From the article:

> It also features a throttle good for 20mph where regulations allow.

That must mean they have a class 2 option.

replies(2): >>45674054 #>>45674081 #
3. thrill ◴[22 Oct 25 19:33 UTC] No.45674054[source]▶
The way I read it is if you use throttle-only you can reach 20 mph, but then if adding pedal-power you reach 28 mph. The pedal is probably not generating sufficient force to add 8 mph, but it’s telling the control system to do that.
replies(1): >>45675053 #
4. bb88 ◴[22 Oct 25 19:35 UTC] No.45674081[source]▶
You can usually limit the bike to go less than 20mph in those cases.

It would be nice to have the GPS automatically set the pedal assist max speed when riding on shared paths with pedestrians and people.

I have also seen road bikers on those same shared paths pedal faster than 20mph.

replies(1): >>45676568 #
5. jlhawn ◴[22 Oct 25 20:57 UTC] No.45675053{3}[source]▶
class 2 and class 3 are mutually exclusive. You cannot legally have an e-bike that supports throttle up to 20mph that can also continue to e-assist if you pedal up to 28mph. While it's technically possible in software to switch between these modes, consumers aren't supposed to be able to do this on their own.
replies(2): >>45675733 #>>45675973 #
6. sethherr ◴[22 Oct 25 22:04 UTC] No.45675733{4}[source]▶
You have an incorrect definition of Class 3.

Class 3 allows pedal assist up to 28 and throttle to 20

https://thecyclistchoice.com/resources/electric-bike-classes...

7. IncreasePosts ◴[22 Oct 25 22:28 UTC] No.45675973{4}[source]▶
I did it on my e bike...all I did was lie to the computer about how big my wheels were, which was a directly accessible in the settings menu
8. nradov ◴[22 Oct 25 23:44 UTC] No.45676568{3}[source]▶
No consumer GPS is precise enough to reliably distinguish between a bike path and an adjacent regular road, especially if there are any overhead obstructions nearby. Many bike paths don't have a 20mph speed limit anyway.