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Shaving grams can be an addiction. If light is what you're after Easton's R4 SL Freehub Body is perfect for a quick fix. The R4 SL Freehub is compatible with Easton's R4 and R4 SL hubs. It's been "tuned" by way of the CNC machine. They mill away enough material (mostly extra splines) to save up to 22 grams over the R4 Freehub Body.

One of the beautiful things about Easton wheels is that a switch from Campagnolo to Shimano or SRAM componentry or vice-versa won't necessitate a new wheel purchase. You could just replace the freehub with one that is compatible with your new gear. Likewise, if you routinely use two different cassette ratios depending on your race courses, you might think about a spare freehub body. It's actually quicker and easier to remove the whole freehub body (cassette and all) with two 5mm hex keys than it would be to fumble with a chainwhip, lockring tool, and wrench to remove and swap cassettes.

The Easton R4 SL Freehub Body also includes ceramic bearings. It's compatible with all EC90 and EA90 wheelsets and is available in three versions:

  • Compatible with EC90 Aero, EC90 TT, EC90 SLX, EA90 SL, EA90 TT and EA90 Aero wheels
  • Only available Shimano 10-speed, Campagnolo 9/10/11, and SRAM Powerdome

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