Only ridden a handful of times and in great conditio! The choice of top professionals, for the Quarq SRAM RED AXS E1 the lightest, stiffest, and most accurate integrated power meter and chainring combo just got lighter with a new carbon crankarm construction. The SRAM-integrated power meter is accurate to +/-1.5% and isn't affected by temperature changes. The consistent 13-tooth gap on the rings ensures fast and reliable shifting. Plus SRAM offering more crankarm lengths than ever before to ensure this crank works for you.