The Shimano Tiagra FC-R4000 brings the two-piece crank architecture of Shimano's premium road groupsets down to the Tiagra tier, giving road and endurance riders a stiff, reliable platform without paying for top-end weight savings. The 50-34T compact chainring combination and 165 mm arm length make it a natural fit for riders who favour a higher cadence, want friendly gearing for longer climbs, or are running a shorter inside leg.

Highlights

• Tiagra 2x11-speed: Full compatibility with Shimano's 11-speed road drivetrain for a wide, smooth gear range.
• 50-34T compact gearing: Accessible low gear for climbing combined with a useable top end for flat and rolling roads.
• 165 mm crank arm: Promotes a higher cadence and suits riders with a shorter inside leg or a more aggressive riding position.
• Two-piece construction: Stiff crank platform for efficient power transfer with straightforward installation.
• 110 mm PCD: Consistent with current Shimano road standards, enabling future chainring swaps within the ecosystem.
• 43.5 mm chainline: Optimised alignment for Shimano 11-speed road front shifting.
• Shaped and pinned chainrings: Shift ramps and pins keep front changes crisp and reliable under load.

Smooth, reliable front shifting

The 50-34T chainrings are profiled with Shimano's shift-ramp and pin technology, keeping front gear changes smooth and predictable whether you're easing the pace on a long climb or picking it up on a fast descent. The compact ratio gives you a friendly bailout gear without sacrificing too much speed at the top end.

Stiff two-piece platform

The FC-R4000's two-piece crank design — inherited from Shimano's higher-end road cranks — keeps the pedalling platform stiff and direct. More of your effort goes into forward motion rather than flex in the drivetrain. The external bearing interface works with widely available Hollowtech-compatible bottom brackets, so you can match it to your frame's shell standard.

What's in the box

This listing is for the crankset only. No bottom bracket and no chain guard are included. You'll need to add a compatible Hollowtech-type external bottom bracket (such as a Shimano SM-BB52 or similar) to suit your frame's bottom bracket shell.

Compatibility & Fit

Designed for Shimano 2x11-speed road drivetrains. Recommended chains: Shimano CN-HG601-11 or CN-LG500. Pairs with the Shimano FD-R4000 front derailleur. Chainring BCD: 110 mm. Chainline: 43.5 mm. Requires a Hollowtech-compatible external bottom bracket (sold separately) to suit your frame's bottom bracket shell. If you're unsure whether this crankset suits your frame or existing drivetrain, contact Tune Cycles and we'll help you confirm the right fit.