Shimano Tiagra RD-R4000 11 Speed Rear Derailleur (Black) Brand-Zone 3 Developed with the ethos of

Developed with the ethos of reducing weight and adding style

It's no wonder Wirecutter's review frankly admits "we don't say this often

Dimension NDR reduces compression of soft tissue

Fits aero handlebars of up to 125mm outer circumference

The cups are made with fully precision-machined alloy to ensure a perfect fit in the frame and the perfect platform for the bearing

Shimano Tiagra RD-R4000 11 Speed Rear Derailleur (Black) Brand-Zone 3 Developed with the ethos ofThe Shimano Tiagra RD R4000 rear derailleur is designed for modern 2x11 speed road drivetrains, delivering smooth, precise, and reliable shifting performance. Featuring a compact and refined construction, it combines lightweight materials with durable engineering to ensure consistent operation across varied riding conditions. The integration of Shimanos Shadow RD design provides a low profile structure that enhances stability, reduces chain slap, and