Seller notes

Inner ring is the same high strength Ultralight™ 7075 T651 aluminumused for the standard Renthal sprocket Outer ring is electroless nickel coated steel for ultimate durability andis designed with the minimum amount of material to keep weight down The outer ring is expanded at 200°C and then fitted over the inner. Thisinterference fit combined with the wave pattern ensures a permanentbond for the life of the chainwheel The flat socket head screws add additional strength to the chainwheelduring...

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