cross-posted from: https://lemmy.ca/post/49655095
This is an Ultegra 11s chain after 1000km of wear from a 1500W mid-drive. Used to ride a Tangent back in 2016. T’was shredding till it went *clunk*.
beefy chain probably implies beefy sprockets, start looking at motorcycle stores 😄
I feel like 1500 Watts is crazy for anything categorized as a “bicycle.” That’s like having four elite road racers towing you along. I’m impressed that a chain designed for human power levels lasted 1000km.
The peak torque was similar to pushing standing on the pedals, a torque a chain must sustain, but not necessarily for extended periods. This motor could sustain that torque for as long as the battery lasts. Production motors these days can do similar peak torque during start from a stop but don’t sustain it indefinitely. I think the Tangent was geared to do about 120Nm. The new DJI does 120Nm for half a minute. Bosch has a few models that do 100. After trashing that chain, I switched to ebike-specific model from KMC. Never had an issue with it and lasted thousands of km on that monster. I now ride all my bikes with X11e EPT / e11 EPT even though I don’t use mid-drives anymore. It lasts a lot and it handles a lot of abuse and neglect.
