TERN VEKTRON Cassette

[TOOSLOW]

Has anyone upgraded the rear cassette to a 11-42, 11-46?
Going to try this out and looking for advice or tips.
The stock 34 just can't cut the mustard on my hills.

 

[fooferdoggie]

it depends on if your derailleur can handle the range. I took my tandem to the shop so they could check and i just had them do it so they could adjust the derailleur. but this a Bosch powered bike right? do you know the chain ring size? that may be the way to go go smaller.

 

[TOOSLOW]

I want the best of both worlds. Running a 22 tooth chainring, on a 11-34 rear cassette. Hills are a tough on this arrangement. Concern here though is a 20" rear wheel brings the derailleur cage down pretty low already on 34 tooth gear, so a 42 might create a clearance issue. Factory setup was for flat city commuting obviously.