Since its debut in 2007, the Flow rim has empowered riders to advance their skills and push limits. Known for being lightweight, wide, tubeless-ready, and exceptionally strong, it transformed mountain bike rims and influenced riding styles. The Flow MK4 builds on this legacy with a 30mm wide asymmetric design that enhances overall wheel strength. Its reinforced spoke bed and offset drilling create a highly durable wheel favored by top Red Bull Rampage athletes. The BST Asymmetric shape balances dent resistance and tire bead retention on both sides, even in harsh terrain. With Stan’s Bead Socket Technology, the Flow MK4 ensures easy tubeless setup and reliable airtight performance, delivering unmatched control and confidence on every trail.
KEY FEATURES
Low-profile 30mm internal width optimizes tire shape, traction, and control for 2.3-2.6”tires
Durable 6069 aluminum with welded joint and reinforced spoke bed
BST Asymmetric design combines Stan’s legendary easy tubeless inflation with a stronger, more balanced wheel build
3-year rim warranty with 1-year crash replacement
SPECIFICATIONS
Rim Internal Width:30.0mm
Rim External Width: 33.6mm
Rim Depth: 18.9mm
Hole Count: 28-hole, 32-hole
Drilling Style: Symmetrical
Rim Color: Black
Material: 6069 Aluminum Alloy
Brakes: Disc only
Rim Weight: 466g (26") / 487g (27.5") / 521g (29")
