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The Varstrom TSDZ-2B is a 48V, 500W mid-drive e-bike conversion motor with a torque sensor and a claimed 80 N·m of torque. It fits frames with a 68–73 mm bottom bracket and drives a 42T chainring through the bike's own gears, so it climbs better than hub motors of similar power. It suits riders converting a standard bike who want natural, pedal-assist feel and are comfortable with tools. Against Bafang's BBS02 it is quieter and feels more like pedaling, but it has less peak power and a smaller aftermarket.
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Lowest price we've seen: $296.99 on Nov 14 at Amazon. Tracked across 1 store since Nov 14.
Owners of the TSDZ2 family describe smooth, bicycle-like assist and good climbing for the power. Common complaints are installation fuss and a smaller support network than Bafang.
The Varstrom TSDZ-2B (model TSDZ2B) is an electric bike motor that runs on 48 volts and is rated at 500 watts. It produces up to 80 N·m of torque, and its efficiency rate is 80%+.
It fits bicycles with a 68 mm or 73 mm bottom bracket and comes with a 42-tooth chainring. Cables connect through a 1T4 cable integration.
