• OneUp Components RAD Shimano Rear Derailleur Cage

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OneUp Components RAD Shimano Rear Derailleur Cage

The RAD cage is a replacement outer cage for Shimano GS (medium cage) clutch rear derailleurs, which dramatically improves shifting performance of any extended range Shimano 10x drivetrain.

The key feature of the OneUp RAD (Radial Appositioned Derailleur) cage is that the upper pulley wheel has been moved rearward of the cage pivot to optimise the derailleur for larger sprockets. Now as the derailleur moves into larger sprockets the top pulley wheel automatically moves away to adjust the chain gap, no longer relying on just B-Screw.

The RAD cage is a 1x10 11-40/42 specific product only for medium cage derailleurs. Long cage (SGS) derailleurs are only needed for 2x drivetrains. Shorter derailleurs are preferred for 1x10 systems as they’re lower profile so less vulnerable to damage on the trail and they allow you to run a shorter chain, which improves chain retention.

OneUp Components is a small team of passionate mountain bikers, dedicated to bringing genuine value to the MTB market. OneUp was founded by three former Race Face engineers, Chris, John and Sam. Together they have over 22 years of bike industry experience and have developed some of mountain biking's most recognisable and award winning products.


  • Dramatically improves shifting performance for Shimano GS (medium cage) Shadow+ clutch rear derailleurs
  • Chain Wrap (cassette wear) and Free Chain Length (shift performance) corrected to stock Shimano specification
  • Tuning your derailleur to achieve perfect shifting with an 11-42 is now much easier
  • Requires Stock B-Screw adjustment (No more removing washers or reversing B-Screws)
  • Improves chain wrap and extends cassette life
  • Installs in under 15 minutes

Technical Data:

  • Weight: 26g
  • Material: 7075-T6 Aluminium
  • Compatibility: Shimano GS (medium cage) Shadow+ 10spd clutch rear derailleurs, Deore (RD-M615 GS), SLX (RD-M675 GS), XT (RD-M786 GS), XTR (RD-M985/RD-M986 GS)

Buy OneUp Components from Chain Reaction Cycles, the World's Largest Online Bike Store.

  • Delivery costFREE
  • Delivery toUSA
  • 365 Days return or exchange

    If you're not completely satisfied with an item you may return it within 12 months of purchase. We'll give you a full refund if the item hasn't been used or the component hasn’t been fitted.

    More information on returns
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Buying Guide

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