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.
Gravel BikesRoad BikesTandemsBike PackingLoaded Touring
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.
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The carbon fiber fork legs of the Zinn Duro are built with an extra large cross section and a thicker carbon layer to make it extra stiff and strong. The area where the disc brake impacts the fork are extra thick to resist the forces of a 450lb rider. The fork went through rigorous testing at a bicycle component testing laboratory in Germany where 50% greater forces were applied as compared to ISO standard testing in order to simulate a larger rider. The fork also withstood these forces for 50% more cycles than is required for ISO standard . Carbon fiber has great vibration damping abilities, so the other benefit of using thicker carbon layers and a larger cross section is that there is more surface area to absorb vibration. This means you get the strongest fork with the smoothest ride quality. In order to accommodate riders of all sizes, we designed this fork with a 450mm long carbon fiber steering tube with a 30% thicker material than the leading carbon forks. This means the steering tube will withstand the immense torque of a 7 foot tall rider who weighs up to 450lbs, or for someone looking to raise their stem higher than recommended on other carbon forks. |
Duro Carbon Fork
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