Have the base model 08 Hi Fi that came with a Shimano FC-M442 crank set/BB (I think square taper?). 68mm shell width on the Hi Fi.
Any problems or issues upgrading to a SLX FC-M665 Hollowtech ||? This is a 2 ring specific (22/36) crank set and BB that comes with a bash. I would also use the Shimano FD speced for this crank set.
M442 has internal shell bearings for the crank vs. external for the M665 but this should still work fine I presume?
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Thread: 2008 Hi Fi BB/crank question