This replacement chain ring will fit bracket mount motors with the flat style bearing. This will not fit the newer style with the separate freewheel bearing. .This can also be used by hobbyists. The chain ring can turn without the pedals rotating. Use it to hook up a motor to the chain ring.
Freewheel Bearing for bracket mount motor
This replacement Bearing will fit bracket mount motors with the raised style bearing.
A powerful 250 watt hub motor spoked into a 20" rim with connectors. This motor is brand new and powerful enough to propel a 250lb rider at 20 mph on motor only. The hub is threaded for a single or multispeed freewheel cassette. Reg $220. Sale $199.