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Freehub Body

Rolf Prima Eos4

Ultra-lightweight & fast

The new Eos4 takes the Eos3 deeper for riders looking for the best combination of aerodynamics and weight. We’ve taken our US made TdF7.0 hub platform that includes our T2 high engagement drive mechanism for immediate engagement and top of the line Enduro XD-15 ceramic bearing and paired it with a new 42mm deep, Delta profile, tubeless compatible, carbon clincher rim. At 19.5mm internal width, the Eos4 is designed to be fast and handle well in all conditions and be versatile for tire size options.

Looking for a Disc brake option? Choose our Ares4 Disc with a 7.0 Upgrade for a hub platform with the all-conditions stopping power of disc brakes. Both rim and disc brake models are tubeless compatible. Add our Basic Tubeless or Full Tubeless kit to your order and you’re ready to go.



  • Weight: 1395g [595g/800g]
  • Spoke count: 14/16
  • Spoke type: Sapim CX-Ray/ CX Speed, bladed
  • Rim Depth: 42mm Carbon Clincher - tubeless compatible
  • Rim Width (max): 28.5mm, internal 19.5mm
  • Hubset: TdF7.0 w/ T2 High Engagement & Enduro XD-15 Ceramic Bearings
  • Brake type: Rim brake
  • Freehub: Shimano/SRAM or Campagnolo 10/11-speed
  • Tire size recommendation: 25mm to 62mm (2.4")
  • Includes: rim strips, carbon specific brake pads, QR set and Rolf Prima's Certainty
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    Have questions? Want to customize your order?
    Give us a call! We know it might be a bit daunting buying that sweet new ride or pulling the trigger on some high-end race day wheels online. We ride these products, we test them, nerd out on them... we live this stuff. Whether you want to simply change the length of a stem, ask a few questions, or work with us on a build from the ground up, we're here to help.

    Call us at 905-401-3401 or shoot us an email at shop@changosports.ca.
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