The Flow MK4 LTD wheels combine Stan's flagship MK4 rim design with the robust E-Sync hub. For a limited time, the MK4 LTD is a performance wheelset at an incredible price point! Laced with premium Sapim Race spokes and brass nipples laced to the extra-durable E-sync hub. Featuring chromoly steel axles and double row Enduro bearings, special heat treated steel ratchet rings, and a pawl design that reduces stress on freehub and bearings, making it the perfect choice for traditional and e-bike use.32 SpokesLow-profile 30mm internal width opitimizes tire shape, traction , and control for 2.3-2.6" tiresLight and durable 6069 aluminum with welded joint and reinforced spoke bedBST Asymmetric design combines Stan s legendary easy tubeless inflation with a stronger, more balanced wheel buildE-sync hubs offer fast 8.18 engagement with reinforced pawlsEnduro bearings with double-row freehub bearing and chromoly axle offer 47% increase in max torque capacity over Neo hubsIncludes Tubeless Tape and Valve3-year rim warranty with 1-year crash replacementItem SpecificationsCassette Body TypeShimano Micro SplineColorBlackDefined ColorBlackDesigned for ebikeYesHub/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 LTD Rear Wheel Rear Wheel UPC: 708752545564