Originally Posted by hhk25

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?