Proven cross-compatibility applied to an ultra-lightweight, durable AL-7075-t6 Chainring. Highly CNC'D technical finish. Available to match Helix cassette colors! Combine with the chain, derailleur/shifter of choice without a change in chain retention quality. Build a dream rig with more freedom and spec creatively. One of the strongest and most durable alloys available, AL-7075-T6 delivers the lightest and longest wear-life chainring without compromising strength, bend resistance, or longevity. Boost Spacing only