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.

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