Shimano Indexing

tmansteve

Hi All,

Got a new MTB and now find that it has 2 barrel adjusters. 1 on triggers and 1 on the derallieur. Used to just the one. My question is, when indexing the rear derallieur, would it be best to set both barrel adjusters all the way in and a couple turns back to give me plenty of scope. So when I have indexed using the rear barrel adjuster, I have room for adjustment on the trigger??

Hope anyone can understand what I'm trying to say.

Cheers

Steve

cooldad

I find it easier to use the one on the mech when indexing, and the bars if it needs a tiny tweak when riding.

But it makes no difference, just do what makes sense to you.

tmansteve

Thanks for that. So do you have your trigger barrel all the way in?

02gf74

. Yes..

I spend a lot of time setting up the gears so they shift perfectly when adjuster is fully in.

Reason for this is that should cable stretch I can undo the adjuster, this avoids the situation of running out of adjustment and having to reclamp the cable because once the clamp is tightened, the cable get slightly crushed and this can cause problems.

steve_sordy

"Cable stretch" isn't actually the cable stretching, although it feels like it. What it is, is the outer cable settling into the ferrules under the pressure of shifting. The more ferrules you have the worse the potential problem with "cable stretch". So the bikes with lots of inner wire exposed have more ferrules than the continuous outer cable set ups, which only have two ferrules - one at each end.

The thing to do on installation is to tap the ferrule on to the outer cable with a pair of pliers. This will ensure the cable is as far into each ferrule as it will go. I put a spot of waterproof grease into the ferrule to assist this, and to reduce water ingress. Subsequently you will find that "cable stretch" has been dramatically reduced.

tmansteve

Many thanks for all the info. Nice to get an answer instead of stupid remarks. Great to be part of a forum like this.