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Aug. 27, 2019, 7:08 a.m. -  Andrew Major

It depends on the carbon rims; up front, I think the takeaway wisdom is to check with any carbon rim manufacturer before installing an insert (or before buying if you plan to run an insert).  I know some manufacturers blame inserts for rim failures but the only carbon rims I’ve run ProCore in are from Reynolds and they had zero concerns when I talked to one of their engineers about it. I know plenty of riders who’ve specifically bought carbon rims + inserts (CushCore) to get the ride quality and protection but try and trim some grams. If carbon rim manufacturers weren’t designing layups and shapes with inserts in mind when ProCore was first released, I have to think they are now. Certainly I haven’t heard of any company voiding a rider’s warranty due to the presence of an insert.  *edit - just a note to check out Lester’s comment re. e13. Published around the same time as my reply.

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