The Fuel MX is available in four different configurations, with Shimano or SRAM shifting systems, both available with either traditional or wireless controls. The model tested featured the Japanese brand’s new Di2 wireless shifting system. The pearlescent paint finish gives the Fuel that certain something; depending on the light, the color shifts or begins to sparkle in direct sunlight.

This all-mountain bike features 160 mm of front travel and 150 mm of rear travel. The rear suspension utilizes the proven ABP (Active Braking Pivot) system, with a pivot point around the rear axle. By rotating the flip chips on the shock mount, a more progressive curve can be achieved, ideal for heavier riders or those who put more energy into the suspension.

The bike in action

The riding position is very upright, like on an enduro bike. This works well on dirt roads going uphill. When climbing steep and demanding singletrack or even switchbacks, the position feels cramped. You’d wish for a slightly longer cockpit. The mullet setup doesn’t help—the smaller rear wheel “pushes” the handlebars even closer to you. It’s only somewhat helpful that the rear end is a good climber in itself. Gravel roads are more fun on the way up. The shock provides excellent feedback even without the platform function, allowing you to pedal the Fuel efficiently and without bobbing. It only makes sense to activate this function when standing up.

Downhill, the MX setup really shows its full strengths. With minimal input, the Fuel shoots through tight and long, sweeping turns. On trails with lots of quick direction changes, the Trek is in its element. Tracking is a given here—whether the terrain is moderate or steep. It also doesn’t matter if the ground is hard-packed or rocky; the suspension smooths out almost everything. Only during fast, medium-sized bumps at very high speeds does the rear end struggle to keep up. On the other hand, it excels during heavy compression, remaining completely composed. The cable pulls are less quiet, rattling a bit, but this is usually easy to fix. The compact geometry is also noticeable on descents. The standing position could be a bit longer to allow for slightly greater freedom of movement. However, the pressure on the front wheel is sufficient.

Conclusion

The Fuel MX is a fan of quick direction changes and loves the downhill. It holds its own uphill and on the flat, but doesn’t exactly shine there either. The rear end impresses with its good traction just as much as the really cool paint job.