Seller notes

Chainwheel Sprockets Rear 404U-520-42P-HA Manufactured to extremely tight tolerances. 7075 T6 aluminum alloy rear chainwheels are 66% lighter than steel, yet incredibly durable. Advanced tooth profile, concentricity and accuracy of fit provide maximum power transfer and long-life. Combination of a very high-strength base material and an exceptionally hard-wearing surface result in significantly increased chainwheel life. Most available in ultra-light design. Hard anodized finish for better wear ...

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