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I've just set up my Chameleon as 1x10 with the following:
Race Face 36T narrow wide chainring, XT shifter, XT cassette, Zee mech and SRAM 1091 chain. Gear cable and outer are both brand new.
The shifting seems to be ok at best. Sometimes when I shift down a gear, the chain drops 2 cogs instead of 1, but then seems to realise it shouldn't have done this and skips back up 1 again to correct itself.
The XT shifter has a double-click thing, but it happens when only clicking the shifter once, and the chain jumps back up to the correct position again anyway!?
I've tried turning the barrel adjuster in both directions (1/4 turn at a time) but I can't fix the problem. It doesn't happen all the time, but is obviously a pain when it does.
Has anyone had any similar issues or any ideas how to fix this?
Cheers.
Total guess as I've never had this happen but, bent hanger?
Forgot to mention this is on an XT triple crank with the chainring in the middle ring position.
I thought about the hanger but it looks ok - as far as I can tell.
b screw/ guide pulley a bit far out?
as above...could be the mech hanger or b tension screw. also check the cable routing for any kinks. if you've fitted a new rear mech it might be worth checking that you've installed it correctly i.e. the the little tab on the rear mech is sat in the little groove on the mech hanger
Is any of the other kit chain/cassette/front of different ages/wear?
Are the bearings ok in the freehub? I recently had a problem with shifting on a similar set up and the bearings were very worn in the freehub body so allowing the cassette to get out of line. It was worse on the bigger sprockets.
I changed the freehub and haven't had any issues since
Did you change the cables when you fitted it all? If you're using old gear cables they could be gunked up and sticking inside the outer.
+ 1 for checking the cable and shifter I had problem a few months ago and it was to do with this.
Thanks for all the advice.
I turned the b screw 1/2 a turn clockwise and have had a short ride out tonight.
The problem seems to have been cured!! Cheers iffoverload
Good to hear you got it sorted. Chasing gear changing problems can be quite trying. Possibilities are (depending on symptoms).
Shifter gunged up or broken
Cable not sliding properly through outers
Cable tension wrong
Limit screws not set correctly
B tension not set correctly
Clutch too tight or not tight enough
Bent mech hanger
Bent mech
Sloppy pivots
Worn jockey wheels
Cassette lockring loose
Worn cassette
Worn chain rings
Worn chain
To name but a few!