Rear deraileur - clicking noise

Mettan

Been out on the bike again today - there's a ticking noise with the chain on the cassette almost as if the bike hasn't gone into the next gear "fully" - ie when I change from a bigger sprocket to a smaller one it changes gear but I'm left with a constant ticking noise as if it hasn't "fully" changed gear. One solution that does seem to correct this is if I push the front right big STI lever inwards about 10% and hold it there - this makes the noise stop completely, almost as if it needs this final bit to go into gear fully - so I'm just wondering if there's any rear deraileur adjustment I can make that would simulate me holding the large front-right STI lever inwards about 10%.

Thanks

andyp

It sounds like your rear mech is slightly out on it's adjustment. You should be able to get the adjustment right by using the barrel adjuster where the cable is attached to the mech. Turn it by half a turn, then check and repeat until you're happy.

More detailed info is here.

fossyant

As said, it's the adjuster - just turn a little bit at a time to move the top jocky wheel (on the rear mech) in line with the sprocket. Start with the gears in a middle sprocket first, then check the shifting.

There are usually two adjusting points for STI depending upon the frame, but as it's a minor adjustment, use the one on the rear mech - it's a barrel shaped adjuster where the cable joins the mech - clockwise will move the mech outwards, anti-clockwise will move the mech in towards the wheel.... half a turn at the most each time, check, adjust, check until happy.

OC_sprinter

Also, it could be that the chain is too tight or loose....check the tension under the frame where the cable runs to the crank.

Mettan

Thanks guys - moving the barrel adjuster anti-clockwise about 4-6 revolutions immeadiately quietened the clicking sound both for the 39 & 53 ring on the 4 largest sprockets - it's still a bit clicky on sprockets 5,6,7 on both rings, but I'm happy with the improvement so far.

Thanks