J
James Annan
Guest
Time to update an old bike drivetrain, for various reasons.
The bike is about 6 years old with 135mm rear spacing and a shimano freehub. It was actually
previously equipped with a 7 speed shimano cassette using campag 8 speed ergo shifters and rear
derailler, which is a perfect match (5mm per shift). Back in those days I thought I knew about the
compatibility of the different options...but that was before 9 speed (before _I_ was interested in 9
speed, at least).
I'm now trying to put on a new 9 speed gripshift system. A 9 speed cassette doesn't seem to fit on
the hub but I can put on 8 of the cogs (actually the biggest 7 from a 9-speed cassette and then a
12T with lockring from an old 8). I've got new gripshifters and a matching rear derailleur (I've
been told the front shimano derailleur should work ok with non-indexed shifting, it can be changed
later if it causes trouble).
AIUI this ought to work fine as it's only the last 12-14 jump which may be fractionally incorrect.
I'm not really all that fussed about the 9th gear, since (a) it's only an 11T for a non-racing and
non-road-riding MTB which already sports a 50T front chainring (b) it's not my bike! But if I did
want to change to a full 9 speed, would it be difficult? Obviously it needs a few freehub, and maybe
respacing the axle, or is this not necessary?
Thanks,
James
The bike is about 6 years old with 135mm rear spacing and a shimano freehub. It was actually
previously equipped with a 7 speed shimano cassette using campag 8 speed ergo shifters and rear
derailler, which is a perfect match (5mm per shift). Back in those days I thought I knew about the
compatibility of the different options...but that was before 9 speed (before _I_ was interested in 9
speed, at least).
I'm now trying to put on a new 9 speed gripshift system. A 9 speed cassette doesn't seem to fit on
the hub but I can put on 8 of the cogs (actually the biggest 7 from a 9-speed cassette and then a
12T with lockring from an old 8). I've got new gripshifters and a matching rear derailleur (I've
been told the front shimano derailleur should work ok with non-indexed shifting, it can be changed
later if it causes trouble).
AIUI this ought to work fine as it's only the last 12-14 jump which may be fractionally incorrect.
I'm not really all that fussed about the 9th gear, since (a) it's only an 11T for a non-racing and
non-road-riding MTB which already sports a 50T front chainring (b) it's not my bike! But if I did
want to change to a full 9 speed, would it be difficult? Obviously it needs a few freehub, and maybe
respacing the axle, or is this not necessary?
Thanks,
James