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 further, this is your dream electric mountain bike.

E-Caliber wins Outside Magazine’s 2021 Best eMTB award

As expected, the E-Caliber made us feel like the World Cup racers we wish we were, but the real benefit was that we were more willing to ride, rather than drive, to our favourite trails. Logging more miles in the same amount of time is a win in our book. – Outside Editors

Trek’s lightest full suspension e-MTB ever


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


Up to 25 km/h


55 Nm


Up to 70 km

The perfect XC assist

The E-Caliber is built with an ultra-smooth internal Fazua Evation drive system that weighs just 4.6 kg and delivers up to 70 km 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. E-Caliber’s main software control centre is the FAZUA App. Use it to change or customise your support mode settings, download new ride profiles and more, whenever you want!

Be connected

Built-in Bluetooth® Low Energy (BLE) tech makes it easy to connect your wearables and bike computer so you can see all your stats – like rider power, cadence and speed – at a glance while you ride.

Take full control

Get deep into the details of your ride with easy access to FAZUA Toolbox software. Just connect a USB cable from the drivepack to your computer, and you can access usage and settings info, run diagnostic checks, update your firmware and even change the touch sensitivity of your remote.

Find out more

Customisation at your fingertips

Download the FAZUA App to personalise your ride mode settings, download or create new ride profiles and more. All of your ride profiles are saved in the app, so it’s easy to select the perfect one for whatever type of trail you’re riding.

Download the app

Fast rides, right at your fingertips

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 70 km 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 it won’t overwhelm your ride.

Rocket mode

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

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

e-XC geometry

The 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 120 mm 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 incredible analogue XC bike by removing the Fazua motor and replacing the battery with the included hollow downtube insert. You'll save up to 2.7 kg and create a drag-free ride that feels just like a Supercaliber.

Explore the E-Caliber family

Additional options


Hardtail efficiency meets full-suspension control in the Supercaliber. This game-changing XC race bike is fast, light and smooth in the rough.

Domane LT+

Trek’s lightest electric road bike ever, built with a Fazua drive system and the road-smoothing magic of IsoSpeed.

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