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Shimano 105 RD-5800 Rear Derailleur

This 105 5800 series 11-speed mechanical rear derailleur enjoys the trickle down technology from 9000 and 6800 for clear, crisp and accurate shifting all at a super-affordable price. The RD-5800 takes shifting quality to the next level with new pivot points that provide a lighter action or more clearly, less shifting force needed from your hands at the shift lever. Shifting effort is also more equal through the entire cassette for the same feel whatever cog you are in and the distance required to move the shift lever to change gears has been shortened.

Some of the more notable details of the 5800 rear derailleur has a low profile cable pinch bolt which has been repositioned for better leverage reducing shift lever pressure. Shimano claims improvements have also been made to maintain shifting precision over long term use.

For the best shifting performance, Make sure you use Shimano's 11-speed specific low-friction derailleur cableset included with the shift levers. Most folks will want the SS (short cage) version that works for up to a 28-tooth cog. Get the GS (medium cage) version if you plan on using a 32-tooth cog now or sometime in the future.


  • 234 grams actual weight
  • Fast and accurate shifts with less rider input
  • 11-speed design
  • More equal shifting effort through the range

For 11-speed mechanical systems only. Maximum largest rear cog 28t for SS and 32t for the GS version

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Reg Price $59.99