CANNOT FIT CRANK!

[Skyline-GTR-]

  I got a crank with a big chainring of 44 while my Proflex 856 has a 42, it doesnt work with my gear and i dont have anymore room to raise the front gear. Wat can i do now? and top swing doesnt work.

[tmaybee]

Hi there.  I have an XTR crank with 46-34-24 on my 856 and everything works fine.  I do not use a top swing deraileur.  It is a standard (bottom swing?!?).  My frame is an 18" and the deraileur clamp is raised as far as possible.  I wanted to go with a 48-36-26 setup but I don't think I can make that work...  I haven't tried it yet though.

I do remember trying a topswing XTR when I worked in a bike shop and it did not work with my 46-34-24 setup.  Maybe you could try the E-type deraileur that mounts to the bottom bracket.  If you are running 8 speed, just go pick up an old standard bottom swing XT or LX.   I think they have 9 speed bottom swing as well.   Check ebay.  The clamp size should be 31.8 bottom pull.

Hope this helps,
Trevor

[Carbon_Angus]

what is your front der. right now? they all used bottom pull/top swing ders.

when you say "no more room" what is in the way or inhibiting???

[Skyline-GTR-]

I got a Deore XT 31.8 front gear. When i say there is no room, i mean i cant raise the front gear any higher. It works but the shifting is very out. I'm a mechanic myself and i cant fix this. This is pretty wierd.

[Simon]

If the f/mech is a high as it will go (just where the tube starts to bend) this should accommodate a 44t ring no problem,as you've fitted a new crank it may not of gone  onto the B/B taper (I'm assuming your B/B is a square taper unit) as far as the one you replaced so the f/mech's H stop may need adjusting(anti clockwise) to allow the f/mech to swing over the ring a little further,as you've said that you can get it onto the 44t ring then the f/mech must be high enough as long as it doesn't foul the teeth as you operate the shifter,hope this is of some help, Simon.