The sram rail 50 29 ust tubeless wheel delivers outstanding racing performance thanks to its light weight and highly durable alloy rim design thanks to its wide angle profile the mtb wheel can withstand aggressive riding on just about any terrain perfectly balancing strength stiffness and weight the sram rail 50 sends you flying down the trail in a confident fashion at the centre of the 29 mtb wheel is a durable hub with star ratchet system this helps guarantee a highly reliable and sm