Left XT/XTR crank arm [Hollowtech]

[F4guy]

Had an unfortunate incident with mine today, anyone have one floating around. 170mm I think.

[2wheel_lee]

The spline interface is different between XT and XTR on Hollowtech I and II spindles.

[F4guy]

Did not know that, thanks!
So Just XT Left arms?

[2wheel_lee]

You didn't specify what type of interface of cranks you're looking for (or generation). listing the model type would help. For example, 750, 760, 770 are all XT designations. 750 and 760 arms are compatible with each other, but the 770 uses a different system (the 770 is a two piece crank with the spindle built into the right crank arm and it also uses external bearings). Regardless of generation (or at least since 1995ish) XTR crankarms use a different interface than XT.

If you're unsure what model you have, look on the inside of the crank arm near where the pedal threads in. Next to the size, you'll see the designation.

As a last resort, you may be able to use some LX and Deore crankarms.

[CalEpic]

Jenson sells the individual crankarms

[BrewMaster]

...or just post a picture and Lee will identify it for you. He's good for more than just late night booty calls.

[F4guy]

I have found the correct one Jenson and it matches will all the things 2wheel lee was talking about. THanks! It is 175mm only thought and mine are 170m.. Will this be very noticeable?
Thanks for all the help guys!

[BrewMaster]

Though 5mm is not much, I wouldn't ride with uneven length crank arms.