The Arch MK4 rim is light enough to take XC racing but was born from research and testing on the Enduro World Series circuit, making it a great rim for anyone looking to improve both descending and climbing. Constructed of light and strong 6069 aluminum alloy, with a reinforced spoke bed and 28mm internal width ideal for 2.2-2.5″ tires, the Arch MK4 can get you up the climbs easier and make the descent even better. Utilizing Stan’s patented Bead Socket Technology, combined with a stronger asymmetric design for balancing control and weight, the Arch MK4 your best choice for all-around riding.

• Versatile 28mm internal rim width optimized for 2.2-2.5 tires
• Light and durable 6069 aluminum with welded joint and reinforced spoke bed
• BST Asymmetric design combines Stans legendary easy tubeless inflation with a stronger, more balanced wheel build
• 3-year rim warranty with 1-year crash replacement

• Hub Drilling:32
• Wheel Size:27.5″
• ISO Diameter:584 / 650b / 27.5″
• Brake Track:None
• Rim Width (External):31.4
• Eyelets:None
• Rim Joint:Welded
• Rim Width (Internal):28
• Manufacturer Spec ERD (mm):561
• Rim Material:Alloy
• Color:Black
• Rim Depth (mm):18.9
• Valve:Presta
• Defined Color:Gray
• Weight:451
• Tire Type:Tubeless Ready
• Valve Length:Short 32-40mm
• Rim Center Offset (mm):2.5