Durability and an almost uncanny feeling of control on the trail have made Flow rims the preferred choice of multiple Red Bull Rampage riders, and today’s Flow goes even further. The Flow MK4’s reinforced spoke bed, combined with the offset drilling of the asym design, builds into an incredibly durable wheel that brings added confidence to every ride. Unlike many asymmetric rims, the Flow MK4's BST-Asymmetric shape is designed to equalize resistance to dents and tire bead retention on both sides of the rim under even the worst rock gardens and hardest cornering. Combined with Stan's patented Bead Socket Technology, the Flow MK4 rim offers the easiest tubeless setup and most reliable airtight performance on the trail.

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

SPECS:

• Rim Internal Width: 30.0mm
• ETRTO: 559x30.0 (26") / 584x30.0 (27.5") / 622x30.0 (29")
• Rim External Width: 33.6mm ISO: 27.5"x33.6mm
• Rim Depth: 18.9mm
• Tape: 33mm
• Hole Count: 32-hole
• Valve: Presta
• Rim Color: Black
• Max Spoke Tension: 130kgf (1275N)
• Material: 6069 Aluminum Alloy Max Pressure with 2.30"
• Tire: 39psi
• Brakes: Disc only
• Max Pressure with 2.60" Tire: 34psi ERD: 561mm, 3.0mm Offset mm 
• Rim Approximate Weight: 487g