SRAM X4 Rear Derailleur 8-speed

The SRAM X4 Rear Derailleur 8‑speed (2026) is a long‑cage MTB derailleur featuring SRAM’s 1:1 actuation ratio and Direct Route Technology for smoother shifting. Weighing 280 g, it uses an aluminium outer arm, composite inner arm, and supports up to 34‑tooth cogs.

The SRAM X4 Rear Derailleur 8‑speed, released for the 2026 model year, is designed for mountain bikes and uses SRAM’s 1:1 actuation ratio, delivering consistent cable pull for precise gear changes. Direct Route Technology reduces friction, making shifts feel lighter. The long‑cage design accommodates a maximum rear sprocket of 34 teeth and a total capacity of 45 teeth, allowing a wide range of gear combinations, including a smallest sprocket of 11 teeth and a maximum chainring spread of 22 teeth. Constructed with an aluminium outer arm and a composite inner arm, the derailleur balances durability with a low weight of 280 g. It mounts conventionally and is compatible only with SRAM 1:1 shifters, ensuring optimal performance when paired with the intended shifting system. The black‑finished unit offers reliable performance for a variety of MTB setups.

• 1:1 actuation ratio for precise shifting
• Direct Route Technology reduces friction
• Long cage supports up to 34‑tooth rear sprockets
• Weight of 280 g with aluminium and composite construction
• Compatible with SRAM 1:1 shifters only