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Discussion Starter · #1 ·
Hi,

I recently stripped my bike and rebuilt it, using a different front mech (2005 XT) as it did not need a clamp spacer like previous (2006 LX). After adding new cable, fitting mech with correct tolerances:

Low limits: Front small, rear big 2mm chain clearance from cage
High Limits: Front big, rear small <2mm clearance from cage
Cage position as close to front big cog without interference, slight bit of toe in.
Cable tension by hand then adjuster at shifter.

After playing with the tension for a bit the gears were shifting but i could never get an even balance of quick up and down shifts - it was one or the other or none at all. (Drove me mad :madman: )

The only thing I can think of is when I put the chain rings back on there is a particular config that i should have stuck too? is this the case or can they just be bolted back on in any way (the chain rings have different grooves and pins and different places).

Any clues :confused:

Thanks
Andy.:)
 

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There is usually a short post on the outside of each chainring that indicates where the crank arm should pass over the chainring. When you bolt it on, make sure that post is lined up and facing the crank arm. Your inner ring may not have one, unless it's also ramped and pinned, but the middle and outer ring usually have them.

If it's not the chainrings, all I can say is be patient. Front derailleurs (or mechs, for you folks across the pond) are probably my least favorite part to dial-in. It's always frustrating, and when I finally get it right, I swear it's luck and not skill.
 

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Discussion Starter · #3 ·
Thanks MrMook,

My crank does not have the pins aligned under the arm - I will switch this round later and give it ago. Thanks for the advice, definitely what I was looking for. Know what you mean about front mechs, theres definitely some voodoo involved when setting them up

:thumbsup:
 
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