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Trek E-Caliber

The lightweight electric mountain bike 

For anyone who’s ever wondered what’s just over the next ridge

The all-new E-Caliber’s got an appetite for distance, a love of XC speed, and the right amount of suspension and power to turn up  your endurance on epic cross country rides. 
If you’ve ever gazed into the great beyond and wished you had the juice to go farther, this is your dream electric mountain bike.

Explore the Trek E-Caliber family 


Trek’s lightest full suspension e-MTB ever


34lbs / 15.5 kg
(*E-Caliber 9.9 XX1 AXS model)


Up to 20 mph


55 NM


Up to 70 km

Think bigger

Go ahead and erase whatever limits you put on riding (and start setting some new goals while you’re at it). E-Caliber takes the hardship out of factors like distance, steep climbs, and tricky terrain, and turns it into fun.

Keep quicker company

E-Caliber closes the gap between you and stronger riders, giving you the extra endurance and power to ride with anyone who’d otherwise outpace or out-distance you on XC trails.

The perfect XC assist

E-Caliber is built with an ultra-smart internal Fazua Evation drive system that weighs just 4.6 kg and delivers up to 70km of continuous assist.
When you ride faster than the max assist speed, you won’t feel any drag or resistance- just the smooth speed of an ultra-fast XC race bike.

Smart software for the trail

The software in your e-bike system has an enormous impact on your trail experience. It’s what determines your power delivery- and this is especially important for e-MTBs. Fazua’s BLACK PEPPER software was designed specifically for the wonderfully variable terrain you find on any trail. 

Power at any cadence 

As your trail changes, your cadence needs to follow suit. BLACK PEPPER ensures you’re getting power whatever your pedaling speed, covering a wider range from 50 - 120 rpm.

More responsive off the start

You’ll get immediate assistance when you start to pedal, without any lurching. 

Intelligent assist

Fazua’s desktop software gives you full control through a simple USB interface. It allows you to customize your levels of assist, change your remote's touch-sensitivity, update firmware, and perform diagnostic checks. 

Out-of-the-box connectivity

Through Fazua’s Rider App, you’ll have full access to a wide range of sensor- and system-generated data for tracking your trip-performance.

Fast rides, right at your fingertips
 All-new Fazua bX remote

Fazua’s all-new bX remote is a touch-sensitive, low-profile system designed for quick and intuitive changes between the three modes. In rainy weather, you can disable the touch control and opt for the remote’s mechanical button. 

Three assist modes. Infinite possibility.

Breeze mode

The lightest assist mode gives you a constant 100 watts and the greatest range. It’s a gentle, efficient mode that lets you ride up to 70km with a boost.

River mode 

The middle assist gives a maximum output of 210 watts, which is sufficient for most riding situations. You’ll feel the assist, but won’t overwhelm your ride. 

Rocket mode

The most aggressive setting helps you tackle the steepest sections at a maximum output of 250 watts.

IsoStrut: an innovation in speed

Every E-Caliber is equipped with Trek’s exclusive IsoStrut shock- a structural suspension design that pairs 60mm of damped, tunable travel with unique pivotless seatstays that move with the trail to keep you smooth and fast.

e-XC geometry

E-Caliber is built with a geometry that’s right for an electric XC bike. It’s slightly slacker than Supercaliber, with a longer travel 120mm fork and a longer reach for extra stability at sustained high speeds. 

One bike, two ways to love it

Turn your E-Caliber into an awesome analog XC bike by removing the Fazua motor and replacing the battery with the included hollow down tube insert. You’ll save up to 6 lbs. and create a drag-free ride that feels just like a Supercaliber.

Create your dream E-Caliber in Project One

Trails are better with Trek eMTBs