Crankbrothers Synthesis XCT 11 – I9 Hydra Hub Boost


Synthesis XCT 11 – I9 Hydra Hub Boost
  • Mountain bike’s first tuned carbon wheel system for cross country/trail riding and racing.
  • Front and rear specific wheels tuned and optimized to address the specific performance requirements and loads of mountain bike riding.
  • Compliant tuned front wheel improves handling and maximizes grip and control in turns. Wider inner rim width supports wider tire profile in front, increased volume and contact patch, and rounds tire profile to enhance turning.
  • Stiff tuned rear wheel supports peak loads and enhances stability and tracking at speed. Narrower inner rim width supports narrower tire profile in rear, improves rolling resistance, and sharpens tire edge for grip.


  • Engagement: 0.52º quiet engagement / six pawls
  • ETRTO: 585mm (27.5), 622mm (29)
  • Hub: Industry Nine Hydra
  • Inner Rim Width: Front 26.5mm, Rear 24.5mm
  • Outer Rim Width: Front 31.1mm, Rear 29.5mm
  • Rim Height 19mm
  • Spoke Count: Front 28, Rear 32
  • Spoke Type: Sapim CX-Ray
  • Warranty: Lifetime (rim only)
  • Weight: 1490g per set
Brake Type

Disc Brake (6-Bolt)



Freehub Type

Shimano, Shimano Micro Spline, SRAM XD

Hub Spacing


Rim Material




Wheel Size