Can the freehub body on Campagnolo record hubs be changed to make them compatible with Shimano/Sram? I have done this on Shamal wheels but am thinking of getting a 32 spoke set of handbuilts on these hubs.
not sure, but if not, you can get a conversion cassette which runs on one set of splines with the other manufacturers tooth profile. Miche make them, and I'm sure plenty of others are out there.
Or keep the freehub and cassette Campagnolo and use one of these (I'm assuming you have Shimano shifters and derailleur): http://jtekengineering.com/shiftmate.php
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Otherwise get Ultegra hubs, same geometry and similar quality