Cable pull for front XTR (2 or 3sp)

[Roxtar]

I need to find out how much cable length gets pulled by a front XTR shifter.
Apparently, no one at Shimano USA knows and I don't speak Japanese.

Trying to see if I can use a Shim front with my Hammerschmidt.

Can any XTR using mags measure how much cable gets moved with a full swing of their front shifter?

[birdman829]

It should be the same as my sram front too no? Shimano and Sram front derailleurs and shifters are interchangeable AFIK.

[Roxtar]

Aren't all Shimano shifters 2:1?
Even up front?

[mntlion]

12mm +/- (using a older XT , 3 spd pod)

but any shimano should work, as sram and shimano F shifters and F derailers are interchangeable.

[Roxtar]

12mm +/- (using a older XT , 3 spd pod)

but any shimano should work, as sram and shimano F shifters and F derailers are interchangeable.

Great, thanks.
Now just need to get this done:
http://www.tetongravity.com/forums/s...07#post3629407

[Roxtar]

One other thing, Any Shim derailleur will work for 8,9,or 10 speed right?
It just depends on the shifter?

[mntlion]

the jockey wheels are abit different for 8,9,10, but the max/min or limits are the same.

Is doable, not might not be perfect

[Roxtar]

the jockey wheels are abit different for 8,9,10, but the max/min or limits are the same.

Is doable, not might not be perfect

What I mean is that it's the shifter that determines the derailleur movement, right?
IOWs, an M980 (10sp) derailleur mated to an M970 (9sp) shifter and 9sp cassette will work fine?

Sram supposedly took away this backward capability by making the new 10sp slightly off the 1:1 standard. (at least that's what they say)

[Eluder]

The new dynasis (10 speed) front shifter is a different pull from 1-2 than from 2-3. I think hammerschmidt uses its own shifter... but i could be wrong.

Also shimano dynasis rear shifters use a different pull ratio than the 7-8-9 speed stuff, so the rear der is also set up for a different ratio. Word is its 1:1 and 9 speed sram derailleurs work with the 10 speed shimano shifters. I am yet to try this out though.

[1wsguy]

I had a Hammerschmidt a few years ago, and the XO Hammerschmidt shifter. I always felt that the shifter was an overcomplicated mechanism for such an easy task. So, I decided to try something different, and "riganeer" my own my "shifter". I installed a Rock Shox Poplock to do my shifting.
The cable pull was different, (never measured it) so when I would "shift" I could get one gear, but not return consistently to the other, since it would leave slack in the cable. So I then used a small coil spring (a longish rear derailleur adjusting barrel spring), that I fitted between a diameter stepped-down 5mm SIS metal housing end cap and the housing stop on the crank. It took some experimenting to get it right, and I would imagine that the spring would fatigue at some point. It worked fine for a season, then I sold the crank. It was much lighter than the XO shifter, and I enjoyed the simplicity of my rigg, other people were confused.

[Roxtar]

Word is its 1:1 and 9 speed sram derailleurs work with the 10 speed shimano shifters. I am yet to try this out though.

Wouldn't be even slightly surprised. Sram is the company that tells everyone a 3sp front shifter won't work with a double ring which is silly to even suggest (goes against any logic). They also say a 3sp front shifter won't work with a Hammerschmidt (Works perfectly).

For them to be lying about needing to change your derailleur to work with 10sp wouldn't be a shock. It would be huge to find out your current 9sp derailleur will work fine with 10sp shifters.
It'd be very interesting to hear from any mags that want to try it. Just swap a 9sp derailleur into your 10sp drivetrain, see if all is copacetic.