SRAM AXS Ultralight Carbon Rear Derailleur Upgrade Kit | D1 / E1 Compatible | Up to 100g Saved

Reduce SRAM AXS rear-derailleur weight with modular prepreg-carbon components rather than replacing the complete motor unit. Red, Force and Rival D1/E1 configurations, cage choices and individual upgrade parts are detailed below.

📌 Compatibility (Upgradeable RDs)

• Red D1 AXS: ~298 g ➝ ~235 g

• Force D1 AXS: ~335 g ➝ ~235 g

• Rival D1 AXS: supported (target ~245–255 g depending on setup)

• Force D1 XPLR: supported (33T/36T options)

• Red E1 AXS: ~282 g ➝ ~220 g

• Force E1 AXS: ~310 g ➝ ~220 g

• Rival E1 AXS: ~330 g ➝ ~240 g

Note: final weight varies depending on configuration, pulley wheels, and hardware choices.

Construction, purpose and ride benefits

33T and 36T cages are available (36T body shipping end of year). D1 versions are directly works with 36T cassettes for expanded range setups.

A full conversion saves up to ~100 g, bringing total derailleur weight down to ~210 g in optimized builds. Because Force and Red (D1/E1) share identical motor units, you can repurpose a Force derailleur into a build lighter than Red OEM at a fraction of the cost.

The SRAM AXS Ultralight Carbon Upgrade Kit is designed for riders chasing every gram. All structural components are crafted from premium prepreg carbon, molded at 20,000 psi, delivering strength equal to OEM parts with a major reduction in weight.

🔥 Highlights

• Massive Weight Savings: Full upgrade reduces weight by up to ~100 g. Lightest builds as low as ~210 g (Red/Force E1).

• Premium Carbon Construction: Made from top-grade prepreg carbon, formed under 20,000 psi pressure, ensuring stiffness and durability equal to OEM.

• Broad Compatibility: Supports SRAM AXS D1 & E1 platforms (Red, Force, Rival, including XPLR).

• Modular Options: Choose from 33T / 36T cages, inner & outer arms, link plates, or the complete kit.

• Smart Upgrade Path: Force and Red (D1/E1) share the same motor – build a superlight RD from a used Force unit, lighter than stock Red!

• 36T Ready: 36T main cage expected by year-end; D1 versions are directly compatible with 36T cassettes.