Seller notes

Inner ring is the same high strength Ultralight‰ã¢ 7075 T-6 aluminumused for the standard Renthal sprocketOuter ring is electroless nickel coated steel for ultimate durability andis designed with the minimum amount of material to keep weight downThe outer ring is expanded at 200å¡C and then fitted over the inner; thisinterference fit combined with the wave pattern ensures a permanentbond for the life of the chainwheelThe flat socket head screws add additional strength to th...

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