Studio : Getting Fit Publisher : Getting Fit Binding : Sports Product Description The new pinion cogs are offered in two ranges; CNC-machined from long-wearing 7075-t6 aluminum alloy and CNC-machined chromoly. ?3/32 inch cogs are available in 13-18-tooth sizes. ?Both types are designed to fit shimano-compatible cassette hubs. ?Both have a 5mm wide inner base, giving more solid Interface with cassette body. 0
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