ZTR Crest 29" 32h Black Presta Valve The result of blending a ZTR Race rim with a ZTR 355, the ZTR Crest is the best of both worlds All the wall thickness and corresponding durability of a 355 with the next generation BST (Bead Socket Technology)creating a wider rim cavity with shorter sidewalls Fully tubeless compatible with the yellow tape and valve stem 380 grams