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Rims: The Aspin rim is designed for the rigors of everyday use. The 22mm tall, single cavity, alloy rim offers excellent lateral and torsional stiffness with additional toughness at a low weight. The brake sidewalls are CNC-machined for smooth, consistent braking performance. The Aspin is built for everyday training use but fast enough to use on race day.

Hubs: The Aspin wheelset is built around the ST1.2 proprietary hub. The rear hub features our Patented Differential Flange Diameter, which effectively doubles the number of pulling spokes and creates a more durable wheel. Black, CNC machined, hub shells with alloy front/steel rear axles with sealed cartridge bearings provide strength, stiffness and reliability. Upgrade to the Aspin SL and drop another 95 grams for a wheelset that accelerates even faster.

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

Spoke & Nipple: The Aspin wheel set features paired, 14/15 gauge custom butted spokes with wrench flats and internal alloy nipples to create a quicker accelerating, faster climbing wheel with superior, long-term durability. Self-locking thread technology ensures wheels stay true longer. Our patented, Self Aligning Nipple™ design significantly increases spoke fatigue life by allowing the nipple to orient to the spoke angle with less bend.

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