Round Rings MTB BCD100x4

Designed exclusively for BCD100x4 spiders and ROTOR INspider MTB power meters.

ROTOR Round rings MTB BCD100x4 represent our most advanced solution for round 100x4 MTB setups and are the perfect match for INspider MTB power meters. Compared to an equivalent Direct Mount chainring, this configuration saves weight on the chainring by up to 40% while adding the chance to ride with power measurement.

These chainrings are fully CNC-machined from a solid block of aerospace-grade 7075-T6 aluminum alloy. This manufacturing process allows us to achieve one of the best weight-to-stiffness ratios available in a round MTB chainring.

Additionally, they feature our patented Universal Tooth® technology, making them fully compatible with Shimano® and SRAM® 11, 12 and 13-speed drivetrains, including SRAM Flattop® chains. This ensures seamless compatibility with virtually any modern MTB drivetrain.