If you dented, cracked, or lost the plastic cowling that shields the AXS battery on your Eagle rear derailleur, this is the exact replacement piece. The SRAM AXS Battery Cover is a light-weight cowling designed to protect the battery while installed on the derailleur, and it fits all AXS mountain bike derailleurs. It's a small part that takes a real beating on any trail with rocks, stumps, or the occasional lay-down, so keeping a spare in the parts bin isn't a bad idea if you're running AXS on a bike that sees rough terrain.

Compatibility is the thing to get right here. This cover works with the original AXS MTB rear derailleurs: XX1 AXS, X01 AXS, and GX AXS. It is not compatible with SRAM Transmission (T-Type) derailleurs — those use a completely different battery interface and a different cover design, so if you're running XX SL, XX, X0, GX, or S1000 Transmission, this piece won't fit. If you're not sure which generation you have, look at the derailleur cage and mounting: the original AXS models bolt to a standard derailleur hanger, while Transmission mounts directly to the frame's UDH interface.

The cover snaps onto the derailleur body over the AXS battery and holds it in place along with the battery's own latch. It's a plastic piece, black to match the rest of the derailleur, and it installs in seconds without tools. There's nothing to adjust and no wear surface to worry about — it either fits and locks in cleanly or it doesn't, and on a compatible derailleur it fits every time.... Read More