I'm thinking of reverting .....

[legrandefromage]

Dont forget LX came in 2 BCDs, you might have a front mech for a 46t/ 48t outer (which can do 53t!), then theres cable pull.

I like symmetry and was just trying to fix the problem from a different angle.... :cry:

 

[taffy]

i love the ability to trim the front mech with a thumbie.

That said my 92 rocky Ridge has 92 XT RF+ with the lefthand seemingly graduated.
Downshifting can be done 1 ring per triggerpull but up shiftnig it's like a LH gripshift with numerous "in between" clicks. Io i can basically shift from granny to mid while on the large sprockets at the back and then when i change up and the chain is on the small sprockets i nudge the shifter up a tad to trim it.

 

[Dead Rats]

some ancient fr. mechs have a bolt at the back to hold rear of cage toether and you can take it out a slip a washer in to widen cage let's me run 14 speed on my old 10 speed with only slightest adjustment between 1 & 7 at t'back.

 

[Steve Kish]

Unfortunately mine is a riveted one.

The crank BCD is 5 bolt / outer 94 / granny 58, so quite possibly an incompatability problem if the Deore front mech was made to take 130/135 rings.

I'll risk a wee bending session on it and see what happens.

I'm very glad that my roadbike has Campag Mirage shifters where the left-hand lever allows single notch trimming to eliminate this. Having sad that, I had to eliminate the 'chain tinkle' (where the chain actually touches the inside of the big ring when in the small ring and a small sprocket) by putting 1mm spacers between big ring and crank - unlike my 3-ring set-up, on my road bike I do use the smallest sprocket with the smaller ring.

 

[RichN]

I did this on my Mountain Goat because the STX shifter broke, but it actually worked really well. Now sorted with XT STI, so if you're interested I've got a Suntour XC Pro left hand thumbie on the bench with no home. Let me know if you're interested. Yours for the postage and the price a beer.

Rich.

 

[Steve Kish]

Thanks Rich. If my bending is a waster, I'll take you up on it.

 

[xerxes]

Another thing occurred to me.

On the bike that I have a problem with, the chainset has rings with 22,32,44 teeth and I mainly use the middle 32 tooth chaingring up front with the 11, 12 or 13 sprockets at the rear.

On another bike I have chainset with 28,38,48 rings, which means I generally use the middle 38 up front with a sprocket nearer the centre of the cassette on the rear, probably 16 to 18 tooth, I haven't actually checked.

I haven't worked out the gearing in inches, but going just by feel, I imagine they are similar. A larger middle chainring would therefor have some advantages. First the chain line would be better with the sprockets I most use, and second I would have more teeth engaged with the chain both front an rear, which should wear less.

Perhaps I should buy a larger front chainring?

 

[Mr Panda]

I'm very glad that my roadbike has Campag Mirage shifters where the left-hand lever allows single notch trimming to eliminate this.

YESSUM - bootiful they are

and yes iv'e changed front shifters before to get the desired shifting effect, pain in the booty that it is. No thumbie yet tho' - just don't realy enjoy them. Rear mechs are easy in comparison :evil:

 

[Steve Kish]

Managed to help this a bit with all the advice given here.

Bending the cage so that it runs almost parallel helped a bit and I also opened the cage a few GKs by inserting and opening a car brake caliper tool, the one you use for pushing back the pistons when inserting new brake pads.

Certainly improved it a tiny bit - more adjusting will follow.

Thanks again to all.