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Everything you love about road riding, nothing you don’t

The all-new Domane+ SLR electric road bike

An e-road bike unlike ever before

Take the tailwind with you and leave your limits behind on the all-new Domane+ SLR.With a groundbreaking ratio of lightweight design and high-speed assist, Domane+ SLR offers pro peloton power and real road feel in a shockingly sleek and speedy package. This performance e-road bike looks, sounds, fits, and feels like a traditional road bike, with a discreet, natural-feeling assist that helps you fly up climbs, hang with the fast group, and venture to places far, far away.

  So, go ahead – take the long way home. With Domane+ SLR, there’s always room for more miles, more speed, and more fun.

All speed. No limits.

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Up to 28 mph

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Total weight

~26 lbs.*

*Weight varies by model. See product page for exact model weights

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~60 miles

~90 miles with Range Extender*

*in Eco Mode. Varies by route, rider, and terrain

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Tonality units barely perceivable

More than meets the eye

True power lies within. Hidden behind the front chainring, Domane+ SLR’s harmonic pin ring transmission blends seamlessly into the frame, and its compact design offers a Q factor similar to a traditional road bike for a more comfortable ride. Plus, a compact but powerful 360Wh battery allows for a smaller downtube than most e-road bikes, resulting in a sleek and subtle ride your friends won’t believe is electric.

Shockingly light, thrillingly fast

Most e-road bikes make you choose between light weight and high speed. Domane+ SLR offers
the best of both worlds, weighing in at just ~26 pounds with a fast max assist of 28mph.

Our best and lightest carbon

Premium 800 Series OCLV Carbon helps make Domane+ SLR our lightest e-road bike ever.

Small-but-mighty motor

A compact harmonic pin ring motor saves weight while providing a natural feeling assist.

Quietly powerful

One of the best parts about road riding is the moment when the rest of the world fades away. When all that’s left is the open road, the hum of rubber on pavement, and the rhythm of your deepening breath. Domane+ SLR’s remarkably quiet and discreet e-system limits distracting noises so you can focus on the people and places that surround you.



Loudness is measured in dBA units and represents the quantity of an entire sound. 

The TQ system is 1.5x quieter than high powered motors so you can focus more conversations with your riding buddies, and less on the sound of your bike.


Tonality (sound perception)

When it comes to sound, decibels don’t tell the whole story. Sounds like nearby traffic or wind rustling through trees might measure in as quite loud, but they don’t distract us from the ride. That has everything to do with something called tonality. 

Simply put, tonality is the measurement of how unpleasant and perceivable a sound is. It’s the difference between the crunch of gravel under your tires and a squeaking brake rotor.

Cadence and tonality

Cadence and tonality

Tonality, or sound perception, is measured in tonality units, or tu for short. Sounds that measure under 0.1tu aren’t perceivable to the human ear, while sounds over 0.4tu can be grating and unpleasant.

Domane+ SLR’s motor is tuned for tone, measuring in at 0.15 tu on average — 3.5 times less perceivable than other popular e-bike motors — so you can focus solely on the road ahead.

Data recorded in an anechoic chamber using a TQ system and calibrated B&K 4966-h-041 microphone and Siemens SCADAS data acquisition unit with an acoustically isolated Wahoo Kickr trainer set to 300W total resistance and bikes in maximum assist mode. Microphone was located 1 m laterally from the bottom bracket and 1.7 m off the floor (head height) and sampled at 51,200 Hz. Tonality calculated in Siemens Testlab Neo according to the ECMA-74:2019 standard.

Up for anything

All Domane+ SLR models feature versatile 40mm tire clearance and road smoothing rear IsoSpeed so you can venture from smooth pavement to gravel roads with ease.

The new Domane+ SLR

Rigged for paved roads

Prefer pavement over pebbles? Domane+ SLR Shimano models are built with smooth and fast-rolling 32mm road tires and a road-specific 2x drivetrain.

Geared toward gravel

Like to take the road less traveled? Domane+ SLR SRAM models are built with gravel-specific components like capable 40mm gravel tires and a gravel-specific 1x drivetrain.

Nothing else like it

Most e-bike motors use gears and belts to move you forward – but gears and belts lash, slip, rattle, and wear out over time, which can disconnect you from your ride. The Trek Domane+ SLR uses a unique TQ harmonic pin ring transmission that’s not only smaller and lighter than traditional e-bike motors, but – because it has fewer moving parts – it’s also smoother, quiet, and more durable.

A faster ride at your fingertips

Easily switch between three modes of natural-feeling assist with discreet hood-mounted controls conveniently located right next to your shifters.

Ingenious integration

A sleek integrated display on the top tube provides live updates of your range, battery life, and speed.

Trek Central app


See your stats

Keep track of the hours you spend in the saddle, the distance you ride, battery usage, and calories burned with activity tracking.


Tuned to you

You’re in control with three completely adjustable motor tune settings that let you quickly adapt Domane+ SLR to your terrain or riding style.


Plan your ride

Map out the perfect ride with easy-to-use maps and let the app show you how far you’ll make it with your current battery level.

Wanna go even farther?

Enjoy even bigger rides with a compact 160Wh Range Extender that lets you explore ~90 miles in Eco Mode. This compact, bottle-shaped backup battery tucks neatly into your existing bottle cage for simple connection to the charge port without any additional hardware. Just toss it into the existing cage, plug in, and go.

Explore more Trek electric bikes

Shop online or visit us to learn more today.