These chain rings are available in versions with 14,15,16,17,18,18,19,20,21 and 22 teeth. If you have a chain ring with only 15 or 16 teeth on your e-bike, it is advisable to buy several chain rings with a higher number of teeth. The advantage is that you don't have to pedal so fast at higher speeds with tuned electric bikes. Here you can select a chain ring that fits perfectly to your riding habits and your bike.
Please note: If you want to change your chain ring you need the Bosch Spider for Gen2 (Bosch Active / Performance) and ISIS crank puller. If you already got an appropriate crank puller you only need the Bosch Spider for Gen2.
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