STAN'S flow mk4 rear wheel - 29'' - 12x148 ta - sram xdr - 6-bolt - gray

Enhance your mountain biking experience with the durable and high-performance Flow MK4 wheelset. Since 2007, top riders worldwide have trusted Stan’s for reliable, race-ready wheels. Designed for aggressive cornering, higher speeds, and tackling challenging trails, the Flow MK4 offers unmatched control and confidence on every ride.

The BST-Asymmetric rim features a patented shape that ensures a superior tubeless seal, while the robust 6069 alloy construction and reinforced spoke bed deliver exceptional durability. The asymmetric design allows for a single spoke length on both front and rear wheels, simplifying maintenance without sacrificing strength. Traditional J-bend spokes provide proven ride quality and easy serviceability.

At the core are M-pulse hubs, combining magnetic locking engagement with ultra-smooth rolling. Based on the innovative Project321 system, these hubs feature six Neodymium magnets for near-zero resistance during coasting and reliable engagement, with a quick 1.66° engagement angle for instant power transfer. The hubs are equipped with 7075 aluminum axles and Enduro bearings, including a double-row freehub bearing tested for superior durability, all shielded for optimal protection.

Designed for versatility, the wheelset is tubeless-ready with rim tape pre-installed, supporting Shimano Micro Spline, HG, or SRAM XDR freehubs and 6-bolt or Centerlock brakes. The 30mm internal width optimizes tire shape and traction for 2.3-2.6” tires, making it ideal for aggressive trail riding. Combining light weight, strength, and ease of maintenance, the Flow MK4 redefines mountain bike rim performance.