Even easier uphill with Bosch
Chainrings for the Bosch mid-motor are available from the manufacturer in sizes 15, 18 and 20 teeth. If you want to master the steepest climbs on your e-bike and adapt the drive for easier gears, you can use a 13 and 14-tooth motor sprocket from the supplier and Pfäffikon bike store MacBike. The 13 mm sprocket comes with a retaining ring that leaves enough space between the ring and the chain - otherwise the chain would rest on the original Bosch retaining ring. MacBike also offers a 14 mm motor sprocket for Bosch motors, both sprockets can be combined with Bosch Active and Performance drives from model year 2014 onwards.

And for Yamaha too
The Yamaha drivetrain already shines with the option of specifying a double chainring set. If the original 2x combo is too heavy for you, the Yamaha X942 and X943 motors can be fitted with a spider developed by MacBike with a bolt circle of 104/64mm chainring combos up to 36/22.

As the marketer of the aftermarket sprockets - the company Light-Bikes.ch - announces, the small aftermarket sprockets for Bosch and Yamaha drivetrains should not affect the top speed, but only the gear range should be adapted to individual preferences.

www.macbike.ch
www.light-bikes.ch