Originally Posted by
maddog34
what frame are you thinking a 2 or 3 ring crank can't be installed onto? search: ALTA BICYCLE BLACK BOTTOM BRACKET CONVERSION KIT ADAPTER 68MM AMERICAN TO EURO.
It's a folding bike, ie. not standard frame at all. With the 127mm square taper bottom bracket it came with, the derailleur has a very hard time moving from the small ring to the big (~60mm chainline instead of the 45mm expected by the derailleur). The frame make it impossible to use a shorter bottom bracket — the chain rubs against the derailleur fork.
What does that
Alta part do?
Originally Posted by
squirtdad
Will close cogs, give you the overall range you need, especially at low end? if it will take 8 or 9 speed cassette why not go that way?
Thanks for the idea. I don't know much about cassettes and what brand (Shimano, Sunrace, SRAM, etc. ) + model ("Compatible with standard MTB/ATB 9 and 8-speed cassettes") would fit that SA hub. I'll investigate if that solves the problem.
