Shimano Acera 9-Speed Rear Derailleur

Shimano Acera 9-Speed Rear Derailleur
  • Color: Black
  • Color: Silver
$45.99
Please select options

Details

Smooth consistent shifts are yours with Shimano's Acera 9-Speed Rear Derailleur. The wide, forged link offers stiffness for enhanced precision and shifting speed, while the low-profile design keeps it clear of trail obstacles.

An important part of a rear derailleur's job is keeping the chain taut as you change gears. Chain-wrap capacity is a number that tells whether or not a derailleur will be able to do this on the drivetrain you plan to use it on. Calculate chain-wrap capacity with this formula: Chain-wrap capacity = (large chainring - small chainring) + (large rear cog - small rear cog). Example: 44/29 chainrings and a 11-28 cassette: (44 - 29 = 15) + (28 - 11 = 17) = 32-tooth chain-wrap capacity.

Part Numbers

Option UPC MPN Store SKU
Black 689228676343 ERDM390SGSL SHI43118900K
Silver 689228676350 ERDM390SGSS