Bike Forums - View Single Post - Hollowtech II spline engagement

05-30-24 | 08:09 AM

#1

hhk25

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Joined: May 2017

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From: Toronto, Ontario, Canada

Bikes: 2017 Marinoni Tourismo Extreme, 1984 Trek 520, 1987 Niskhiki International, 2013 Brompton M6R, 2016 Brompton P6R

Hollowtech II spline engagement

I installed this new bottom bracket and crankset. I placed two 2mm spacers on the drive side and I have a feeling I don't have enough spindle on the non-drive side crank arm. The little safety tab does drop in properly but I still think I don't have enough spline engagement. When I measure with calipers, the end of the spline is 9mm below the surface of the crank arm.

What does the forum think? Do I need to remove some spacers? Get a new crankset?

One problem might be that I'm using a mountain bike bottom bracket with a road crankset. Are the MTB crank spindles longer?

Last edited by hhk25; 05-30-24 at 08:22 AM.

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