Zinn Duro – The Ultimate Carbon Fiber Fork

World’s Strongest Carbon Fiber Road/Gravel Bike Fork

450mm Reinforced Steering Tube

The Zinn Duro features a 450mm long steering tube with extra thick carbon fiber walls, designed to be strong enough for very tall riders even with extra tall headset stack heights*. Tapering from 1.5” to 1.125” in diameter, its steering tube is about 30% thicker than all other leading manufacturers’ steering tubes and can be cut to any length.

Ultimate Braking Performance

The Zinn Duro is the perfect carbon fiber fork performance add-on and is compatible with any flat-mount disc brake system (the most common brake system for gravel and road bike setups). Carbon fork performance and compatibility is enhanced by flat mounts. Unlike other flat-mount-compatible carbon forks, which only accept 140mm and 160mm rotors, the Duro’s flat mounts can more easily slow heavy loads by accepting up to 180mm rotors. If you want even more braking power with that 180mm rotor, we also sell HOPE RX4+ 4-piston brake calipers, which can be interchanged with any Shimano, SRAM, Campagnolo, or Magura two-piston flat-mount brake caliper.

Extra-Strong Fork Legs for Increased Performance

The oversized carbon fiber fork legs of the Zinn Duro have a beefed-up carbon layup in key, high-stress areas for ultimate strength, stiffness, and resistance to braking forces. The large structure offers exceptional vibration damping, meaning you get the strongest fork with the smoothest ride quality. The structure withstands ISO-standard lab fatigue tests at 50% higher loads than other forks are tested at.

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Versatility redefined

Find the perfect carbon fiber fork for your road bike. This one is designed for tires as wide as 45mm (with fender) or as narrow as 23mm, so it works as well on a disc brake road bike as it does on an adventure gravel bike. It has rack, fender, and bottle mounts, making it perfect for touring and bike packing. You can also fit a 48-50mm tire without the fender of some brands. Different brands measure differently so there are some 48 and 50mm tires that won’t fit. Measure your tire width first and check with us to confirm compatibility.

Specs:

  • 47mm rake
  • 395mm axle to crown
  • 160mm minimum brake rotor
  • 180mm maximum brake rotor
  • Reinforced, 450mm steering tube, tapered 1-1/8″ to 1-1/2″
  • 700x23c to 700x42c tire clearance with fender
  • 700x45c -47c tire clearance without fender depending on brand of tire
  • 21.6mm inside diameter of steering tube
  • 15x100mm through axle included (129mm OL and 1.5 Thread Pitch)
  • Rack, fender, and bottle mounts
  • Expansion plug included

Explore more custom options for fork enhancements on your road bike and upgrade your ride with our expert guidance at Zinn Cycles.

* we have not yet tested a maximum stack height.

Duro Carbon Fork

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