Shimano Tiagra RD-R4000 11 Speed Rear Derailleur (Black) Brand-Zone 3 Dimension NDR reduces compression of

Dimension NDR reduces compression of soft tissue

Compatibility- 2x12-speed

others are for whatever you want – the Avex multipurpose helmet goes wherever you go

Fits aero handlebars of up to 125mm outer circumference

Shimano Tiagra RD-R4000 11 Speed Rear Derailleur (Black) Brand-Zone 3 Dimension NDR reduces compression 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