Raceface Atlas 30, Wheel, Rear, 27.5'' / 584, 12Mm Ta, 150/157Mm, Disc Is 6-Bolt, Sram XdRace Face Atlas 30 Wheel Rear 27. 5'' 12x150 157mm TA 150 157mm Sram XD30mm Internal WidthTubeless Ready (tape and valves installed)4. 5mm Offset improves spoke balance and wheel stiffness6069 Aluminum constructionDent and flat resistant bead design6 double tooth pawls (3 engage at a time)120 points of engagement (3 degrees)One length spoke used throughout wheelset (F&R)