The Flow MK4 wheelset lets you do more. Corner harder, send it further, and carry more speed through any section of trail. Today's Flow MK4 gives you the control you need to push boundaries.Low-profile 30mm internal width optimizes tire shape, traction, and control for 2.3-2.6" tiresDurable 6069 aluminum with welded joint and reinforced spoke bedBST-Asymmetric design combines Stan s legendary easy tubeless inflation with a stronger, more balanced wheel buildM-pulse ultra-low drag magnetic pawl adjustable hubs with 1.66 deg engagementEnduro bearings with double-row freehub bearingMatched wheelsets use traditional J-bend lacing and share a single spoke length for easy serviceabilityIncludes tubeless tape and presta valvesItem SpecificationsCassette Body TypeSRAM XDRColorBlackDefined ColorBlackHub/Brake Compatibility6-Bolt DiscISO Diameter584 / 650b / 27.5"Rear Axle12mm Thru x 148mmRim MaterialAlloyRim Width (Internal)30Tire TypeTubeless ReadyValvePrestaWheel Size27.5" Stan's No Tubes Flow MK4 Rear Wheel Rear Wheel UPC: 847746059745