More informationFEATURES: 28mm internal rim width optimized for 2.2 to 2.5" tires. Lightweight, durable 6069 aluminum with welded joint and reinforced spoke base. BST asymmetrical design combines Stan's easy mounting with a stronger, more balanced wheel.3-year rim warranty with 1-year knock-in replacement.DESCRIPTION:Mountain bikes have changed since the The original Arch rim helped introduce the world to tubeless technology. Featuring a 28mm wide asymmetrical rim shape and ultra-strong 6069 alloy, the current Arch MK4 rim has evolved to fit these more capable bikes throughout. Through years of testing and perfecting this tire, one thing has never changed: versatility Now more than ever, when you want a reliable tire that can handle all trails, the Arch MK4 is for you. you.The Arch MK4 rim is light enough for XC racing, but was born from research and testing on the Enduro World Series circuit, making it a great tire for anyone looking to improve on both downhill and the climbing. Constructed from lightweight and strong 6069 aluminum alloy, with a reinforced spoke base and 28mm internal width ideal for 2.2-2.5" tires, the Arch MK4 can help you climb climbs easier and make descending even easier. better.The Arch MK4's BST asymmetric shape improves spoke angle, allowing for a stronger overall wheel construction Unlike most struggling asymmetric rims. With tubeless inflation and consistent tight sealing in tough cornering, the shape of the Arch MK4 is designed to equalize pressure for easy inflation and incredibly strong tire retention on both sides of the rim. Stan's patented Bead Socket technology. , combined with a stronger asymmetrical design, a lightweight and durable 6069 alloy, and the perfect rim width to balance control and weight, make the Arch MK4 your best choice for all-around riding. Rocky switchback climbs or hitting cambers on every descent, the Arch MK4 is ready for anything you can throw at it.Internal Rim Width: 28.0mmExternal Rim Width: 31.4mmRim Depth: 18.9mmHoles : 28 or 32Rim Color: BlackMaterial: 6069 Aluminum AlloyBrakes: Solo discERD: 561 mm, 2.5 mm offset (27.5") / 600 mm, 2.5 mm offset (29")ETRTO: 584 x 28.0 (27.5") / 622 x 28.0 (29")ISO: 27.5"x31.4mm / 29"x31.4mmTape: 30mmValve: PrestaMaximum spoke tension: 130 kgf (1275 N)Maximum pressure with 38c tire: 60psiMaximum pressure with 2.20" tire: 41 psiMaximum pressure with 2.50" tire: 35 psiRim weight:451 g (27.5") / 481g (29")