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hubset: Aspin SL wheel systems orbit around the ST 2.2 proprietary hub design. Patented Differential Flange Diameter™ on the rear hub lends a mechanical advantage effectively doubling the number of functional pulling spokes; increasing wheel durability. Black, CNC machined, hub shells with over sized axles provide high strength, stiffness and light weight. Optimized flange contours provide full spoke elbow support, increasing spoke life. Precision cartridge bearings are easily serviceable.

freehub mechanism: Forged aluminum freehub body has 3 independently driven hardened steel pawls. The system is strong, simple and dependable.

rims: The Aspin SL rim is slightly shorter than the Elan rim at 22mm tall. The rim section has a slightly thicker wall for added impact strength and toughness. The brake sidewalls are CNC-machined for smooth, consistent braking performance.

spoke & nipple: Black, aero profile 14/15 gage spokes with patented wrench flats and internal alloy nipples with nylon inserts contribute to clean aerodynamic performance and superior, long-term durability. Patented Self-Aligning Nipple™ technology and Dish Reducing design™ reduce spoke bending loads and rear wheel dish to increase spoke fatigue life.

extras: Rolf Prima Aspin SL wheel systems include custom reinforced rim tape and steel quick release skewers.

All Rolf Prima wheel systems are protected by one or more of the following US Patents: 5,931,544; 5,938,293; 6,024,414; 5,947,565; 6,244,667 and 6,497,042. Rolf Prima wheel systems are also protected by several foreign patents including Canadian Patent 2,136,053 with others pending.