Trek Fuel+ Review: Lightweight E-MTB

Written by: Chris Van Leuven | June 9, 2026 | Time to read: 4 min

The Trek Fuel+ is Trek’s light-to-mid-assist electric trail bike, and Trek calls it an adaptable mid-power trail e-MTB. It’s not a full-power e-MTB like the Rail+, and it’s not a hardtail adventure bike. It’s a full-suspension trail bike built around smooth motor support and great mountain-bike handling.

Trek lists three main setups: Fuel+ EX, Fuel+ MX, and Fuel+ LX. They all share the same big idea, but each one has a different trail feel.

Depending on the build, the Fuel+ lineup also includes features such as OCLV Carbon or aluminum frames, integrated displays, dropper posts, and higher-end suspension or drivetrain packages. Some setups also work with a Range Extender, which is great if your rides are long, steep, or remote.

That’s what makes this bike stand out. The Fuel+ platform can be set up with different wheel sizes, suspension travel, rocker links, shock mounts, and geometry. And the Fuel+ is for riders who still want to enjoy rollers, choose lines, and feel what the tires are riding over. Yet, you still want the ride to feel quiet.

I’d think about the Fuel+ lineup by trail style, not by “good, better, best.”

The Fuel+ EX is the one I’d point most riders toward first. It has 145mm of rear travel, a 150mm fork, and 29-inch wheels, which gives it the most balanced feel in the lineup. I’d use it for long singletrack rides, rolling terrain, big climbs, and days when you want the bike to feel balanced and playful but also ready for rough sections.

The Fuel+ MX is the more playful one. It uses a 29-inch front wheel and a 27.5-inch rear wheel, with 150mm rear travel and a 160mm fork. That smaller rear wheel makes the bike easier to move around in tight turns and more technical when the trail gets twisty. I’d look here if you like changing lines, popping off little jumps, and riding rough trails without going all the way to the longest-travel setup.

The Fuel+ LX is the bigger-terrain version. It gets 160mm rear travel, a 170mm fork, and 29-inch wheels. That’s the one I’d look at if your trails are steeper, faster, rockier, or more descent-focused. Higher-end LX builds may also include higher-end components like Fox Factory suspension, SRAM Transmission, or other premium trail components.

A Fuel+ ride should feel like you’re part of the bike, and that’s the point of this category. You’re not riding it because you want the motor to erase the trail. You’re riding it because you want more range, more laps, and more climbing help without losing the feedback of a great trail bike.

The TQ HPR60 motor is central to that. It’s stronger than the older HPR50 system used on Fuel EXe, but it still sits in the smoother, quieter category rather than the full-power category. When riding, the bike helps you maintain momentum rather than pulling you up the climb.

For some riders, a full-power e-MTB can feel like it’s doing all the work. But the Fuel+ feels more like you arrived on the trailhead with better legs. Expect the Fuel+ to feel best on trails where rhythm matters: rolling singletrack, longer climbs, rocky traverses, and descents where you’re constantly choosing whether to stand, sit, pedal, coast, or work hard.

I recommend the Fuel+ to riders who already like mountain biking and want more of it (who doesn’t?). Not riders who want the easiest possible way up the hill, and not riders who want a heavy full-power e-MTB to do everything. The Fuel+ is for someone who enjoys the movement of mountain biking and wants motor support that improves the ride rather than taking it over.

The Trek Fuel+ is a great fit if you want:

• Quiet, natural-feeling pedal assist
• TQ HPR60 motor support
• Full-suspension trail-bike handling
• OCLV Carbon or aluminum frame options, depending on the model
• A ride that still rewards timing, line choice, and body position

This is the e-MTB I’d look at if you like climbing but want to climb more and ride more miles. Or if you love long trail rides but have limited time. Or if your knees, schedule, or local terrain are making it harder to fit your favorite loops into the week.

The limit is that Fuel+ is still an e-Bike, so it weighs more than a normal Fuel. Even with a quiet motor and light frame, you will feel the extra weight when the trail gets slow, tricky, or tight. If you want maximum torque, this isn’t the Trek I’d pick.

The Fuel+ is new enough that certified pre-owned inventory may take some time to become available on Upway. But Upway has carried Trek Fuel EXe models, which are the closest earlier light-assist Trek e-MTBs. That matters because this category gets expensive quickly, especially with carbon frames, higher-end suspension, electronic drivetrains, color displays, and premium build kits.

For a Fuel+, Fuel EXe, or any certified pre-owned light-assist e-MTB on Upway, I’d look closely at the bike’s condition and whether it has the right travel and wheel setup for your trails.

This isn’t the kind of bike I’d buy just because the markdown looks tempting. I’d pick the right Fuel EXe in your size, with a healthy battery and suspension, etc., that has been well cared for. That’s why Upway’s e-Bikes go through a 50-point inspection by master mechanics, and come with a 1-year warranty and 14-day return period. Plus on Upway, you can save up to 60%.