XM 819 Disc is the only true UST rim available on the market. Stiff and durable, yet light, and topped with the added benefit of riding tubeless.
Aluminum threaded eyelets (supplied with the rim)
UST tubeless or tubetype
Disc brake only
Specifications: ETRTO compatible size: 559 x 19 Recommended tyre widths: 1.50 to 2.30 Valve hole diameter: 6.5 mm Recommended nipple length: 16 mm Weight: 450 grams
Greater efficiency due to absence of heat and friction between tube/rim tape/tire. No flat tires due to pinched tubes, torn valve stems or rim tape problems. Very slow deflation rate if punctured. Also employs FORE technology that consists of "piercing" only one rim wall with no loss of material and then tapping the resultant alloy tunnel. This is beneficial because there are no holes in the rims upper bridge which yields strength and stiffness. Also there is less weight with fewer spokes, no eyelets or rim tape. k