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  • Zinn Cycles Zinn Duro - Gravel Road Fork - 47mm Rake - 45mm Tire clearance

Zinn Duro - Gravel Road Fork - 47mm Rake - 45mm Tire clearance

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The Zinn Duro fork is designed and manufactured to be the strongest carbon fiber bicycle fork on the market. Great for big and tall riders, tandems, touring bikes, and gravel

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Super Strong Carbon Bicycle Fork

We have designed a standout carbon fork that is strong enough for heavy and/ or aggressive riders, or for loading a bike down with gear. This fork has superior braking performance, optimal tire clearance, and a long enough steering tube to fit the tallest people out there. The Zinn Duro carbon fork is a testament to our dedication to quality engineering and craftsmanship. This fork is designed and manufactured to be the world's strongest carbon fiber bicycle fork. It works for riders of all sizes. It is ideal for big and tall guys, e-bikes, tandems, touring bikes, gravel bikes, and bike packing. It has a reinforced extra long steering tube, super beefy fork legs, and a larger brake rotor compatibility. 

450mm Reinforced Steering tube

The Zinn Duro features a 450mm long steering tube with extra thick carbon fiber, designed to be strong enough for very tall riders even with extra tall headset stack heights*. The steering tube is tapered and can be cut to any length. It is about 30% thicker than all other leading manufacturers' steering tubes.

Ultimate braking performance

This fork uses a flat mount brake system designed for larger rotors than any other flat mount compatible carbon fork on the market. The fork works with a 160mm or 180mm rotor and is compatible with any flat mount disc brake system (the most common brake system for road and gravel bikes). If you want even more braking power than you get with the 180mm rotor, we also sell HOPE RX4+ 4-piston brake calipers which can be interchanged with any Shimano or Sram flat mount brake caliper to provide incredible braking performance. 

Extra strong fork legs for increased performance

The fork legs of the Zinn Duro are built with an extra large cross section and with a thicker carbon layup for ultimate strength and stiffness while also adding to the vibration damping characteristics. This means you get the strongest fork with the smoothest ride quality.

Versatility re-defined

This fork is designed to work with tires up to 45mm in width or as narrow as 30mm, which means you can run this fork on a disc brake road bike or on an adventure gravel bike. It has rack and fender mounts making it perfect for touring and bike packing. 


  • 47mm rake
  • 395mm axle to crown
  • 160mm minimum brake rotor
  • 180mm maximum brake rotor
  • 450mm reinforced tapered steering tube
  • 21.6mm inside diameter of steering tube
  • 1 1/8" to 1 1/2" tapered steering tube
  • 15x100mm through axle included (129mm OL and 1.5 Thread Pitch)
  • Rack and fender mounts
  • Expansion plug included
* we have not yet tested a maximum stack height. 
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