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SX Eagle 12-Speed Rear Derailleur

3 out of 5 stars
1 Review



Why We Like The SX Eagle 12-Speed Rear Derailleur

SRAM's SX Eagle 12-Speed Rear Derailleur harnesses much of the same technology found on the brand's high-end components at a lower price point, making off-road action that much more affordable for those new to the world of pump tracks and rock gardens. The cage and pulleys are designed with stainless steel, a heavier yet more durable material that supplies confidence no matter how technical the terrain becomes. One-by engineering ensures smooth and reliable shifts, and the SX Eagle is touted by our riders for its quiet personality. To keep the chain on track, SRAM built it with a straight parallelogram design to limit movement about the horizontal access, and the teeth are both taller and squared to engage the chain earlier than traditional triangle-shaped teeth. While we admired the familiar design of the SX Eagle, it was the budget-friendly price that made us fall in love.


  • Reliable, quiet performance for efficient gear shifts
  • Steel cage and pulley bearings boost off-road durability
  • Straight parallelogram design eliminates ghost shifting
  • X-SYNC pulley technology offers systematic gear changes
  • Lock out function for easy wheel changes
  • Item #SRMD13D
11 - 50t, 10 - 50t
[max cassette cog] 50
SRAM X-Actuation
1 B gap adjustment tool
Manufacturer Warranty
2 years