Originally Posted by twocicle

29 XC rim is 31mm deep x 24mm wide. Off the top, my unqualified preference would be to stick to a minimum of 45mm rim depth for the added strength. With the 28 spoke Classic 45(mm) or 65(mm), you lose 2mm (22mm width). Though I would prefer a 24mm width, I think the rim strength factor is more important in this case.

I guess I would pick up the phone and call ENVE to inquire about rim strength as the deciding factor... ie: how would the 29XC stand up under heavy loads, impacts, etc, compared to a Classic 45.