Ultra-light, race-strong, tuned for smoother shifts.

SixWeel 12-Speed EVO Cassette

Shop Cassette

  • Lightweight

    Cuts grams without sacrificing stiffness.

    Full-Ti version weights from 118g & Steel version weights from 178g. (Weight including locking ring)

  • Shift Smoothness

    Tooth ramps and chamfers for faster, quieter shifts.

  • Titanium Strength

    Grade 5 titanium; heat-treated for >1000 MPa tensile strength.

  • Compatibility

    Compatible with HG freehubs and all 12s systems.

    A dedicated 11t gear provide for SRAM chains with request.

Tooth ramp and chamfer details

Shift Smoothness, Engineered

Precision-cut ramps and chamfers are timed to our 12-speed tooth progression—keeping cadence steady on the flats and delivering controlled jumps for climbs.

From 11–17T you get mostly 1-tooth steps for tight cadence control; past that, spacing increases gradually so you keep speed without awkward gaps. The ramp windows and chamfer geometry are matched to these exact transitions to pick up and release the chain quickly and quietly—even under load.

  • Timed ramp windows: Chain climbs to the next cog with predictable, faster engagement.

  • Chamfered entries: Reduced chatter and easier pickup at high torque.

  • Tight early steps (11–17T): Hold rhythm in fast group rides.

  • Gradual mid jumps (17–27T): Balanced speed and hill transitions.

  • Climb finish: Large 30/34/35T options for low gearing without mid-cassette gaps.

Available Ratios (12-speed)

  • 11–30T: 11-12-13-14-15-16-17-19-21-24-27-30
  • 11–34T: 11-12-13-14-15-17-19-21-24-27-30-34
  • 11–35T: 11-12-13-14-15-17-19-21-24-27-30-35
Tooth ramp and chamfer details

Shift Smoothness, Engineered

Precision-cut tooth ramps and chamfers guide the chain with predictable timing—delivering quicker, quieter shifts under load.

  • Ramp windows tuned for up/down shifts

  • Chamfered entry reduces chain chatter

  • Timing optimized for 12-speed chain geometry