70" is hardly a big gear... a good road frame should be able to cope with the force required to push it up a hill. 52/20 compared to around 52/12 at the high end of an average road cluster.
if by "cheap conversion" you mean "a cheap old road frame" then maybe the frame is fucked, but try the things that BMMF said before you chuck it.
70" is hardly a big gear... a good road frame should be able to cope with the force required to push it up a hill. 52/20 compared to around 52/12 at the high end of an average road cluster.
if by "cheap conversion" you mean "a cheap old road frame" then maybe the frame is fucked, but try the things that BMMF said before you chuck it.