yeah, hang onto those 75s because you're likely to have clearance issues. the XD is actually a pretty clean looking crank and it's 130bcd if memory serves. if it matters to you, those forks feel kind of sloppy/flexy; i've come across them several times in building older conversions for friends. see if you can pick up an alloy tange or SR in the depths of your LBS or coop— it shouldn't cost more than $40 and will vastly improve the handling.