The Shimano CUES FC-U6040-2 is a double crankset built for road and gravel riders who want reliable 2x shifting without breaking the bank. Hollowtech II hollow-forged aluminium crank arms deliver a stiff, lightweight platform that transfers pedalling power efficiently — ideal for mixed-surface adventures and everyday riding.

Highlights

• Hollowtech II technology: Hollow-forged crank arms reduce weight while maximising stiffness and power transfer to the drivetrain.
• Asymmetric 110 BCD chainrings: 46/32T combination gives a versatile gear range suited to both road climbing and flat-out gravel riding.
• Wide speed compatibility: Works with 9 and 10-speed LINKGLIDE and HG 11-speed chains for flexible drivetrain builds.
• Outboard bearing design: Hollowtech II spindle interface maximises bearing spread for smoother rotation and increased durability.
• Versatile BB shell support: Fits standard 68mm and 70mm threaded bottom bracket shells.

Design & Construction

Part of Shimano's CUES range — designed to unify gravel, recreational road, and commuter drivetrains — the FC-U6040-2 uses hollow-forged aluminium crank arms to strike the right balance between weight savings and the torsional rigidity riders need when pushing hard out of corners or grinding up loose climbs. The asymmetric chainring spider keeps both rings securely in place, reducing dropped-chain incidents on rough terrain.

Compatibility & Fit

Designed for 9 and 10-speed LINKGLIDE drivetrains; also compatible with HG 11-speed chains. BCD is 4-bolt asymmetric 110mm (Shimano standard). Chainline: 47mm (suited to 135mm or 142mm rear axle spacing). Q-factor: 152mm. Requires a Hollowtech II-compatible bottom bracket — Shimano BB-RS501 or BB-RS500-PB recommended, sold separately. Fits 68mm and 70mm threaded BB shells. Pedal thread: 9/16".