Keep your carbon race rims in tip-top shape and play around with the ever-ready Ibis 738 27. 5in Boost Wheelset. Traction is nearly endless under you as you tear down the trails on 2. 8in tires, thanks to the massive 34mm internal rim width. At 1,880g, you will have no trouble mashing up the climbs, and 32 Pilar spokes provide durability and strength on the chute down. The 738s are available with either the HG or XD driver, depending on your drivetrain.