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They have been working perfectly with the Dura-Ace bb. The spindle was a tight fit to get installed through the bearings, might be because of my first diy bb shell facing. I think that the rubber O-rings is not a perfect solution for pre load, because bb shell width will affect pre load tightness, and with time the rubber rings will degrade. However, after a few hundred kilometers the bb has gotten alot smoother than it was on the first install, and seems ok. Probably just thick factory grease on the bearings. I only noticed the difference in the bb smoothness while changing chainring bolts, not when pedaling. I think that these cranks will only work with the road type HT2 bb’s because the MTB bearings are different width as far as I know.
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anzi
Just to check, these cranks 100% ok with Hollowtech II BB's? All the marketting literature I can find specifies only Miche, and their upgraded supertype BB's are like the unicorn