- TA only make their chainrings from the best 7075 T6 heat treated aluminium. The teeth are cut in the traditional manner on a lathe which produces a much better and more accurate tooth form than pressing which is used by most chainring manufacturers. Features: * SPACING: 110mm PCD * COMPATIBILITY: Inner Double * Arm/Speed: 5-Arm 8x/9x/10x * MATERIAL: 7075 T6 **Note: Zephyr Inner chainrings are suitable for 11x, only when it is paired with an outer 11x chainring.**
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