Stan's Crest MK4 Tubeless 27.5" Wheels. Features: Built for speed and a truly versatile wheelset, gravel to XC Crest MK4, 25/28.4mm internal/external width, disc specific aluminum asymmetric clincher rim features Bead Socket Technology (BST-Asymmetric), improves tire performance at equivalent pressures and allows fewer pinch flats WideRight: Provides the optimal volume without distorting the tread pattern or the side knobs so that they are in the correct position for cornering. Proper tire profiles not only allow for optimal tire performance but also allows the tire to do its secondary job of protecting the rim as well as the tire sidewall Stan's M-Pulse hubs Sapim D-Light spokes Rear wheels available in HG 8-11sp for Shimano/SRAM 8-10sp, Shimano 11sp Mountain compatible cassettes or XD for SRAM XD driver compatible cassettes Front and rear axle conversion kits sold separately Includes Stan's tubeless valves and Stan's yellow tubeless tape Optimal WideRight tire sizing up to 2.3" Specs: Front Rear:rear (HG 8-11sp) Rim:Crest MK4 disc clincher Hub:Pulse IS disc Axle Spacing Mm:12x148 Boost Hole:32h Spoke:14/16/15g Nipple:alloy Color:black Weight Set:tbd