The Stans NoTubes Arch MK4 Rim is designed for hard charging trail bikes that need to climb as well as they descend. With a tough but lightweight 6069 aluminium construction and a 28mm internal width, the Arch MK4 is the perfect all rounder.Versatile 28mm internal rim width optimized for 2.2-2.5 tiresLight and durable 6069 aluminium with welded joint and reinforced spoke bedBST Asymmetric design combines Stan s legendary easy tubeless inflation with a stronger, more balanced wheel build3-year rim warranty with 1-year crash replacementThe 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 aluminium 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.The Arch MK4 s BST Asymmetric shape impr