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Quick question for the e-bike team... anyone pulled any spokes through a rim or broken any, climbing very steep stuff with 90Nm motors on full assist?
I'm pondering an e-fatbike and there is loads of grip, just wondering if the tyre/motor combination can overpower the spokes and rim.
If the spokes or rim failed climbing/using the bike normally, I'd be straight back to the manufacturer, as its not fit for purpose.
If you nailed the rim into a rock/stump/etc, then thats your fault!
I'd say you can generally stop any bike quicker than you can accelerate it...even an ebike.
On the basis that the forces are just reversed to stop a bike... I can't see a fundamental problem.
(Over time of course e-bike wheels probably see a bit more fatigue, and you spend more time pedalling that braking, so long term maybe the spokes/rim eyelets don't last so long, but that's not the question you're asking).
None yet and I do quite a bit of max power (from me and the bike) sprinty climbing. Have destroyed numerous Brompton spokes though!
The peak torque from an ebike motor isn't terribly high, I'm sure the braking loads and impacts are harder on the wheels.
I have snapped spokes braking hard on full-sus mtb braking on steep tarmac. Was turning too. Around the inside of a hairpin on hot alpine day with sticky grippy surface. Probably a very high load situation.