Left hand shifter question

heathy_76

I've started to notice after about 300 miles my chain is beginning to rub on the front derailleur in certain gears, when I'm in the middle ring. I can usually set it up so it runs fine when the chain is on the smaller rear cogs or fine on the higher rear cogs, never both.
It's not annoying me too much, yet.

But it led me to wonder, why don't mtb's have indexing like campagnolo where you can fine tune the front derailleur position?

It makes a lot of sense to me.

(Any suggestions on solving the problem until then are welcome too!)

I understand this mght be in the wrong sub-forum but I thought it was more of a general question than a workshop one.

nicklouse

dont use the gears that rub.

they will be replicated somewhere else.

if you read the shimano set up info you will see that they recommend not to use a few gears.

some people used grip shift left shifters to allow such indexing.

heathy_76

Thanks.
I've already read about what gears not to use, it barely causes me a problem anyway.
I'm more interested in why SRAM and Shimano don't have a front mech shifter (excluding grip shift) with more indexing positions especially as campagnolo use this method?

Verta

I have the same problem with my Pitch - where did you read about what gears not to use? I'm interested in reading up on this

Cheers

phz

surprised noones made this reply yet so i will -

easiest option - just ditch two of the front rings and that left shifter and fit a chain device

problem solved

slainte :P rob

Chaz.Harding

Verta, it's common knowlege.

If you use the gears in the opposite extremes (big and big, small and small) the whole drtive train will wear a hell of a lot faster.

Try to keep your gears say, in the largest 5 sprockets on the small chainring, the middle 5 sprockets on the middle chain ring, and the smallest 5 sprockets on the largest chainring.

Yes, there is an overlap, but it's so you have a wider range of usuable gears.

Chaz.Harding

pHz 8)