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Run Ultegra shifters with XTR crankset?(4 posts)

Run Ultegra shifters with XTR crankset?snuggleman308
Jul 26, 2002 6:05 AM
I asked this a while back, but no posters had actually tried this. Something like a road bar and shifters on a MTB bike.
Bottom pull front der.

Shifting in back is fine, perfect, but I'm not sure how to set up the front der.

Would you try to adapt an Ultegra front der (or) one of the XTR top or bottom swing models?

Thanks, John Tomac.
(not that one)
re: Run Ultegra shifters with XTR crankset?Chen2
Jul 26, 2002 7:51 AM
What kind of frame? What size seat tube? Don't try it on a carbon fiber frame. The mountain bike front derailleur would fit the curvature of the chain rings but you need to know if it will work on the frame. I would think that the shifters would work fine and that you would probably need a pull down front derailleur. If you have a metal frame and if the mtn. front der has the correct tube diameter clamp, then you would be able to adjust it to the correct height over the chain rings. It's doubtful that a braze-on type derailleur would adjust low enough.
It's a lot easier to replace the cassette and rear derailleur with mountain components and leave the crank-set with road components.
It's a mountain bike frame, right?Spoke Wrench
Jul 26, 2002 9:33 AM
I think that you'll have the best luck with a front derailleur that is similar to the one that came on the bike. Generally the issues are the front derailleur matching the curvature of the chainrings, cable routing and derailleur clamp mounting vs water bottle mounts and flared seat tubes.

I've never used a road shifter with a mountain front derailleur, but I have done the opposite so I assume it will work fine. I will say that as a rule, front derailleurs, especially STI triples, are much more touchy to set up than rear derailleurs.

Good luck.
Sorry so long getting back to you's -snuggleman308
Jul 31, 2002 4:53 PM
It's a road frame 31.8 tube downpull cable. Mounting the front der isn't the issue, rather, throw etc. That is, will the damn thing shift right? I've mixed road and mtb rear ends many times - just haven't had great success mixing up STI road shifters with front der's and haven't yet figured out why.

Shimano's "non-compatible" isn't an answer and an XTR crankset, BB, der is too pricy to "just try it" which is what I usually do. Wondered if anybody had ever done it.

Thanks for your posts.