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  1. #1
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    SJ FSR 04 and XT Hollowtech II crankset

    Hi!

    I'm replacing the original "Custom Shimano Hollowtech, Octalink XT Spline" crankset and bottom bracket "Shimano ES-30 Octalink spline, 68 mm shell, 121 mm spindle, 50 mm chainline" with the XT HT II crankset (including new bottom bracket).
    When I install it with the two spacers on the drive side and the one spacer on the left side (normal front derallieur clamp) I get the chainrings very far out, the big one almost in line with the outer derallieur plate. I tried to measure the chainline, and I got it to about 52 mm.

    Have anyone experienced this problem?

    I think I'll have to get the two spacers on the left side. That would be OK I guess? But why does this happen?

    Cheers, Hans

  2. #2
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    Quote Originally Posted by Hasse
    Hi!

    I'm replacing the original "Custom Shimano Hollowtech, Octalink XT Spline" crankset and bottom bracket "Shimano ES-30 Octalink spline, 68 mm shell, 121 mm spindle, 50 mm chainline" with the XT HT II crankset (including new bottom bracket).
    When I install it with the two spacers on the drive side and the one spacer on the left side (normal front derallieur clamp) I get the chainrings very far out, the big one almost in line with the outer derallieur plate. I tried to measure the chainline, and I got it to about 52 mm.

    Have anyone experienced this problem?

    I think I'll have to get the two spacers on the left side. That would be OK I guess? But why does this happen?

    Cheers, Hans
    I had the same problem on my 04 Enduro comp. I put 2 spacers on the left side to get the chainline right,but the crankarms weren't centered on the frame. I really didn't notice it on the trail, but in my head it was wrong. When I put it back the way the directions say to assemble it (2 spacers on the right) I had to re-adjust thr front derailer way out but it works fine.

  3. #3
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    Quote Originally Posted by Hasse
    Hi!

    I'm replacing the original "Custom Shimano Hollowtech, Octalink XT Spline" crankset and bottom bracket "Shimano ES-30 Octalink spline, 68 mm shell, 121 mm spindle, 50 mm chainline" with the XT HT II crankset (including new bottom bracket).
    When I install it with the two spacers on the drive side and the one spacer on the left side (normal front derallieur clamp) I get the chainrings very far out, the big one almost in line with the outer derallieur plate. I tried to measure the chainline, and I got it to about 52 mm.

    Have anyone experienced this problem?

    I think I'll have to get the two spacers on the left side. That would be OK I guess? But why does this happen?

    Cheers, Hans
    Yep, I've experienced the same thing. I measured very close to 50mm with the XT M760s on, so I've concluded the Spec specs were incorrect. For the amount it changed, I can see the original cranks/BB having a 47.5 mm chainline (not sure if I actually measured it or just concluded this?). Anyway, if someone out there with the stock cranks on could measure their chainline, it might help clear some of this up.

    Dave

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