- These chainrings have five-hole shrouds, are manufactured from CNC-machined AL 7075 T6 aluminium alloy, and feature Black TT Total Treatment anodisation. **Specifications** * Weight: 326 (59T) * Single Speed * Thickness 1/8" * Material: AL 7075 T6 CNC * BCD: 144 / 5 equidistant holes * Miche crankset compatibility: All system compatible
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