I am having an issue with my gears. On my ride today the rear shifter seemed reluctant to stay in the easiest gear. By the end of the ride it would;t stay in that gear, doesn’t ‘click’ when you go into it, and started to not stay in the next gear down either.
Anyone else had this issue?
I am having an issue with my gears. On my ride today the rear shifter seemed reluctant to stay in the easiest gear. By the end of the ride it would;t stay in that gear, doesn’t ‘click’ when you go into it, and started to not stay in the next gear down either.
Anyone else had this issue?
If the cable slips throught the clamp at the derailleur you’ll get this symptom. Also if the cable housing seats itself a bit better after a new installation.
Hugh
Have you tried tightening the hex bolt at the shifter? I have not looked that the rear shifter, but when my front wanted to slip back to the small ring (due to the spring force of the derailure), I just tightened it up 1/4 turn to increase the friction and it holds great. My guess is the rear, although indexed, is based on friction as well. I know on my old dura-ace shifters, I could adjust how hard or easy it was to shift by adjusting the friction. In fact, my rear on my SRAM TT900 setup is a bit tight and have intended to loosen it to make it easier to shift - but I always forget after I get off the bike 
If anyone else searches and finds this thread … I think I just answered my own question.
I undid the housing on the shifter. The bolt, metal plate and plastic washer come away to reveal what looks like a metal cog inside. There are three springs, which sit in the housing, one arm of each spring holds onto one of the cog teeth. As you change gear the spring slips over the teeth of the cog and then hold the cog in place once you stop shifting.
To cut a long story short, one of the springs was broken. As you pull the lever up there is more and more tension, I assume it needs all three springs holding the cog in place at the point where there is the most tension. The two remaining springs were able to hold the cog in the higher gears at lower tension.
Here are the springs. The spring kit costs around $11.
Have you tried tightening the hex bolt at the shifter?
Thanks but think I found the issue. See above.
Have you tried tightening the hex bolt at the shifter?
Thanks but think I found the issue. See above.
Good to know - thanks for the follow-up