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c00ps
Well most of the Shimano bbs are cheaper than a pair of SKF bearings so I think that’s that answered!
So is the difference between road and mtb Hollowtech 2 cranks just the longer axle length with mtb cranks? Only actual difference is if one were to use a BBR60 with road cranks in a 73mm shell, the nds spline wouldn’t stick out far enough. I think I need one of the mtb ones, as snottyotter said, just so I get a fresh set of uncompressed spacers. Plus the nds cup may be slightly deeper threaded to accommodate the use of spacers.
Road:
-Ultegra BBR60 (68 or 73mm shell, no spacers).
Mtb:
-XTR BB93 (spacers for 68-73mm shell)
-SLX BB-MT800 (as per BB93 but cheaper?)
-Deore BB52 (as above but entry level bb)
-Saint BB80 (for 68, 73 & 83mm shell. Has a very wide looking drive-side cup. Probably don’t want this one in case the threads aren’t deep enough in the bb shell)