Our top of the line 29quot xc trail sl wheelset combines an all mountain carbon rim with proprietary 142 rear hub to create this extremely stiff light and strong package for use exclusively on specialized 142 framesrim type clincher tubeless ready rim material carbon fibre rim width 28mm external front spoke pattern radial3 cross 11 rear spoke pattern 3 cross 11 spoke count 32 front and rear spoke type dt super comp nipple type dt pro lock hexagonal front hub carbonalloy b