Bosch Performance Line Sprocket Change

[Twinkleten]

When pedalling along on down grades I feel that I could do with a higher gear especially trying to build up speed to tackle the next climb. The existing sprocket has 15 teeth and I would like to change this for one with more teeth. What would be a reasonable upgrade without having to change anything else e.g. chain or guard? I realise hill climbing will be compromised but figure that I can always use more assist from the motor. Any thoughts or recommendations would be appreciated.

 

[soundwave]

16 18 or 20

http://www.elektrofahrrad24.de/spezial-ersatzteile-haibike#.VdEHRPlVhBc

22

http://www.pro-cycling-golla.de/Bosch_Active_Performance_Line/Kettenblatt_22_Zaehne_artikel5561b0fb9d7e0.html

you will also need the spanner to take off the lock ring 20 quid

http://www.speedup.altervista.org/tool-for-spider-nut.html

dual sprockets 14- 18

http://speedup.altervista.org/crown-for-bosch-my-2014.html

 

[Twinkleten]

Soundwave

Thanks for the prompt response, I'll do some digging and let you know how I get on.