Apico nylon rim locks, Available in sizes, 1.6, 1.85, 2.15 & 2.50 Crafted from a durable high quality, light weight nylon. A unique contoured design which protects the innertube from potential wear and tear. Designed with angular ridges to ensure a secure fit of the tyre onto the rim. • Holds your tyre securely on the rim. • Prevents slip under high torque situations. • Prevents damage to inner tubes and valves. • Universal fitments for use on a wide range of motorcycles.