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For a decade Cycle Underground has produced the highest quality alloy custom chainrings designed for every crankset and drivetrain known to man. Each chainring uses 5083 Armourplate aluminium which work hardens with use to maximise life of the chainring.  All individually CNC'd, perfectly circular with no high or low spots for the smoothest and quietest drivetrain possible.

Designed to work seamlessly with your crankset -be it Campagnolo, Sugino, Shimano, SRAM and more from a time gone by.

Our D1 and D4 production chainrings are available in 130 and 144 BCD, in two designs and and in a blasted alloy finish and black anodised finish.

Made in Australia -  Pedalled around the world.