front mech question

silly lily

Hi guys,
Looking to but this a Shimano Deore LX front mech, this one
http://www.chainreactioncycles.com/Mode ... delID=6074
My question is which of the bottom 2 listed do I want? my frame is 22". the dgree stuff refers to?
Thanks! :oops:

FSR_XC

I'd say a fair guess would be to do with the size of your top chainring.

ie how many teeth it has.

silly lily

well, it's got 42 teeth.

Andy B

the degree numbers listed relate to the seat tube angle of your bike.

supersonic

it corresponds to chainstay angle. Mtbs usually have the larger measurement.

silly lily

Oh, I see.. . so am I reasonably safe to get then the 31.8-34.9 TP/BP (48 tooth/63-66 Deg)?

supersonic

do you know what swing you need ie top or bottom (or conventional?) and your seat tube diameter? And the 44t 66-69 will suit better.

silly lily

Oh, yes, darn!! I mean 66-69, just copied and pasted the wrong line from CRC. Yes, I do know the diameter.
The 'swing' bit... not sure now, the one I'm replacing is a Shimano FD-C050.
The item description says "Dual Pull design for use with top or bottom cable routing "... wouldn't that take care of it? or am I just missing something...

supersonic

its where the tube clamp is in relation to the cage. Best thing to do is google images and compare!