SRAM gear lever sensitivity issue

by Mr Jono   May 25, 2014  

Hi,

I've been using SRAM apex on my winter bike for a couple years now. It's performed well so far, but recently I'm noticing that it's becoming easier and easier to shift 2 gears when you only want to shift one (only really affects down shifting into lower gears). Or, if you want to shift 2 the rear mech shifts 3. I know the anti-SRAM lobby will say that is just SRAM, but it doesn't happen with the force groupset on my good bike and it never used to happen in the first 12 months of using the apex.

I know you can adjust the reach of the levers, pretty sure you can't adjust the sensitivity though right? Is there anything that can cause this? Build up of dirt maybe? The cable tension is bang on, if I'm careful it shifts precisely and returns perfectly too. However, in a bunch ride in the pissing rain going up a snakey climb I find that precision doesn't come quite so easily.

It definitely used to be way better, so I'm convinced it's an issue that's become apparent over time. Hopefully there is a cure though!

Cheers

7 user comments

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Had zero issues with Apex (and it still works just as well as the day I bought it 2.5 years ago) but the right hand shifter on my Rival equipped bike recently died after struggling for a while.

This may not even be relative to your problem, and I have no idea if SRAM have fixed this issue for newer Apex stuff, but basically the splines got worn off the internal mechanism (see pic below) so it may be worth checking them out for wear as this obviously affects how it shifts.

https://pbs.twimg.com/media/BoPDXq1IAAAJXlc.jpg:large

I did get a free replacement one from Fisher even though it's out of warranty though Cool

@oddbydefault

oddbydefault's picture

posted by oddbydefault [100 posts]
25th May 2014 - 10:19

3 Likes

Checked the spines, they're in perfect nick so that's one possibility eliminated.

I washed out the lever mechanism and then blasted through some TF4 lube and that seems to have improved the feel of the shifting a bit.

I'm so lazy I'd rather order something off Wiggle than go to the shops for Haribo...

posted by Mr Jono [106 posts]
26th May 2014 - 10:06

2 Likes

I think this might be a chain problem. Everyone knows that a chain stretches, but not so many recognise that over time the lateral (sideways) stiffness is reduced as particles of grit grind away inside the links. With a decline in stiffness the chain is freer to jump around in a less controlled way. I'd try a new chain especially if it hasn't been replaced in a while.

posted by wellcoordinated [102 posts]
26th May 2014 - 15:10

2 Likes

The chain was only about 200 miles old when I noticed the problem. It's probably done about 1000 miles since then. I'll try a new chain once in a couple weeks as a last resort before I consider a new lever maybe

I'm so lazy I'd rather order something off Wiggle than go to the shops for Haribo...

posted by Mr Jono [106 posts]
26th May 2014 - 15:40

2 Likes

My Force did that for a while and found it to be too much cable tension !!!!

still on the 3rd switch-back of Bwlch !

posted by therevokid [770 posts]
27th May 2014 - 7:28

2 Likes

therevokid wrote:
My Force did that for a while and found it to be too much cable tension !!!!

Even with the cable tension backed off completely the lever still feels the same, so not sure this can be the cause

I'm so lazy I'd rather order something off Wiggle than go to the shops for Haribo...

posted by Mr Jono [106 posts]
27th May 2014 - 9:23

1 Like

Riding this morning the lever seemed to be much better, so maybe it was a bit gunked up? Will wait for a long ride at the weekend to see if it's really fixed.

I'm so lazy I'd rather order something off Wiggle than go to the shops for Haribo...

posted by Mr Jono [106 posts]
28th May 2014 - 8:19

1 Like