I am looking for a single direct mount chainring for 2019/2020 250W Yamaha PW-SE mid-mounted center motor.
I am looking for a single direct mount chainring, that has 40 teeth (40T), 42 teeth (42T) or more, for a Batavus E-go Harlem electric bike with 2019/2020 250W Yamaha PW-SE mid-mounted motor. I believe, that the current chainring was produced by Miranda, but unfortunately they would turn out to have trouble responding to queries.
Why change the chainring and gearing?
The purpose of changing the gearing by switching the chainring to one with a higher number of teeth is not for the purpose of tuning, because the speed will always be limited by the speed sensor system. The purpose of changing the gearing is obtaining a lower and relaxed pedal rotation speed, which also suits the Yamaha PW-SE motor, that has its torque at lower pedal rotation speeds. For reasons, that is unknown to me, Batavus chose a low gearing, that is suitable for climbing steep mountains, but not suitable for longer country side road trips.
If you can help, then let me know. If you need one yourself, then also let me know, because it might be possible, that these can be produced by a local metal workshop. Thanks.
This page was last updated 2022-04-12.