Trek Procaliber SL, Top Fuel and Fuel EX 29 revamped

Significant changes made to line-up of cross-country race bikes

27.5 29er All Mountain Trail Cross Country
Trek Top Fuel 9.8 SL single lever remote lockout for both fork and damper. Photo by Jeroen Tiggelman

Trek Top Fuel 9.8 SL single lever remote lockout for both fork and damper (click to enlarge). Photo by Jeroen Tiggelman

Trek Top Fuel FAQ

What wheel size is on Top Fuel?
Being a cross-country bike where speed and efficiency matter, Top Fuel gets Smart Wheel Size for the fastest wheel that fits. Larger sizes from 17.5 and up get 29” wheels while the 15.5 gets more proportional 27.5” wheels.

Does this replace the Superfly FS?
Yes. Top Fuel takes over as the 100mm full-suspension XC race bike in both alloy and carbon models.

How is it different than the Superfly FS?
In short, the bike is more capable without sacrificing any of its lightweight speed. The most notable difference is the suspension layout. While Superfly FS used a swing link and fixed shock mount, Top Fuel uses an EVO link and Full Floater, which attaches the shock to two moving points. This gives our suspension engineers the ability to further fine tune the spring rate for better performance across a wider variety of terrain. Top Fuel does still use Trek’s Active Braking Pivot. Other notable differences include: Boost 148/110 hub spacing, Smart Wheel Size, and Control Freak cable management.

Why does Top Fuel feature an EVO link instead of a swing link?
Our one-piece EVO link allows us to mount the shock to the Full Floater chainstay mount for better suspension tuning and it provides extra frame stiffness.

Trek Top Fuel 9.8 SL one piece EVO link offers a lot of stiffness without a severe weight penalty. Photo by Jeroen Tiggelman

Trek Top Fuel 9.8 SL one piece EVO link offers a lot of stiffness without a severe weight penalty (click to enlarge). Photo by Jeroen Tiggelman

Is this the same bike Trek Factory Racing was riding earlier in the season?
Our Trek Factory Racing squad has been riding and testing several prototype and early production models since the beginning of the race season in February. This is the culmination of all that testing and feedback.

Does Top Fuel feature Boost hub spacing?
Yes! Top Fuels equipped with 29” wheels benefit from both Boost110 up front and Boost148 in the back. This gives Top Fuel stiffer wheels for maximum efficiency and control while also allowing us to shorten up the chainstays and provide more tire and chain ring clearance.

How much travel does Top Fuel have?
Top Fuel has 100mm of XC-tuned travel.

How much does the frame weigh?
The frame weighs 1900g with all hardware, paint, and shock.

Is the frame Di2 compatible?
Di2 will cleanly integrate with any carbon Top Fuel frame thanks to our Control Freak cable management system and a battery that’s attached to the water bottle mounts.

Can I run an internally-routed dropper post?
Yes! Control Freak cable management system allows riders to internally route any combination of cables or hoses for a clean, customized set-up.

Trek Top Fuel 9.8 SL equipped with the Bontrager Montrose Elite saddle. Photo by Jeroen Tiggelman

Trek Top Fuel 9.8 SL equipped with the Bontrager Montrose Elite saddle (click to enlarge). Photo by Jeroen Tiggelman

What is that hole in the bottom of the downtube?
It’s part of the Control Freak cable management system. The port under the downtube allows the use of a zip tie to secure the internally routed hoses so they don’t rattle inside the frame.

Is that a Mino Link?!
Yes! We’ve offered adjustable geometry on our longer-travel bikes for years, and now that versatility extends to XC riders as well. By simply rotating the Mino Link nuts that connect the seatstay to the EVO link, riders can adjust their head tube angle by a ½ degree, which will also raise or lower the bottom bracket by 8mm.

Does the fork have G2 Geometry?
Yes. All 29er-equipped Top Fuel models feature forks with a 51mm offset for the best 29er handling.

Is Top Fuel available in Project One?
Yes! Carbon Top Fuel will be available in Project One this August so discerning riders can fine-tune their spec details and choose paint to match their own style.

Will it be available as a frame?
Yes! There will be a carbon Top Fuel frameset available with both carbon chainstays and seatstays. It will be painted the stock 9.9 paint scheme.

What’s the largest chain ring I can run?
Top Fuel will accept up to a 36T 1X which is a World Cup spec. You can run any 2X combination, of course.

Are there any Women’s Top Fuel models?
Yes! Top Fuel 8 Women’s features the same high-performance geometry and suspension as the inline models, but with a women’s specific saddle and paint customized for more feminine style.

What if I want to upgrade my wheels, fork, or crank? Are Boost-compatible aftermarket components available?
The industry is rapidly adopting the Boost standard. The following manufacturers have already indicated that they will be offering Boost-compatible components: Bontrager, DT Swiss, Shimano, FSA, RockShox, SRAM, Race Face, Specialized, E-thirteen, Easton, Hope, and Industry Nine.

For more information visit

About the author: Jeroen Tiggelman

Jeroen is a contributor based in Belgium. He is expert in the field of photography and a fan of local beer.

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  • Olivier says:

    Great to see you folks from mtbr were here in the Netherlands! I was not aware of this event or I would have loved to attend. I live nearby and am happy that these trails have now gotten some international attention!

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