Stans NoTubes Arch MK4 Rim - 27.5 Disc Black 28H. 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 Stans 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 Stan’s legendary easy tubeless inflation with a stronger more balanced wheel build

3-year rim warranty with 1-year crash replacement