Proven cross-compatibility applied to an ultra-lightweight, durable AL-7075-T6 chainring. Highly CNC-machined technical finish. Available in the colors of the Helix cassettes. Combine it with the chain, derailleur, or shifter of your choice without compromising chain performance. Build your dream rig with more freedom and creativity. AL-7075-T6 is one of the strongest and most durable alloys on the market, providing the lightest and most durable chainring without compromising on strength, stiffness, or longevity.