Read our Trek Domane+ SLR 9 review covering real-world range, Fazua Ride 60 mid-drive motor specs, carbon fiber frame, electronic shifting, and price.
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The Trek Domane+ SLR 9 features an ultralight 800 Series OCLV Carbon frame designed for endurance road riding. With a total weight of only 26 lbs, this premium road e-bike handles like a traditional road bike, balancing the frame geometry and weight distribution between the carbon tubes and the integrated mid-drive motor. The overall build quality is designed for road enthusiasts who want a premium, lightweight pedal assist bike. For comparison with standard utility designs, our Vlektra Bolt review outlines alternative commuter setups.
Fazua Motor App Tip
Use the Fazua mobile app to customize the assist curves. Adjusting the power ramp-up settings can extend range on flat road training rides.
Performance is driven by a Fazua Ride 60 mid-drive motor that runs silently and integrates into the bottom bracket. The motor delivers a Class 3 top speed of 28 mph, helping road riders maintain speed on fast group training rides. The IsoSpeed decoupler absorbs road vibrations smoothly, and electronic shifting provides responsive gear changes. For comparison with standard hub motor options, see the Vlektra Velocity review for motor specs.
Energy is supplied by an integrated 430 Wh battery pack housed inside the down tube. Recharging the battery from empty to full takes about 3 hours using standard smart chargers. Real-world tests show that the lightweight motor and carbon frame deliver a range of up to 60 miles on flat routes, making it ideal for endurance riding. For a comparison of standard lithium configurations, see our Vlektra Retro guide to understand battery chemistry specs.
Riding Safety
Do not charge the bike if the charging port is damp or wet after a rainy ride. Dry the port completely to avoid charging controller damage.
Braking security is managed by hydraulic disc brakes, which offer excellent stopping control on steep descents. The 700x32c tubeless tires offer excellent grip on paved roads, while the Shimano shifting keeps gear changes smooth. For riders seeking a budget-friendly electric option with a motorcycle chassis instead, our Crown Fit 70 review outlines specifications.
How light is the Trek Domane+ SLR 9?
It weighs only 26 lbs, which is exceptionally light for an electric bicycle, making it handle like a high-end non-electric road bike.
What is the charging duration?
A full recharge takes about 3 hours using standard outlets.
Is the battery pack removable?
The battery is integrated inside the carbon down tube to preserve aerodynamic performance, but it can be removed for servicing by an authorized Trek dealer.
What is the motor brand?
It features the premium German Fazua Ride 60 motor, which runs silently and detaches its gear unit to prevent pedalling resistance when switched off.
What is the gear system?
It uses Shimano's flagship Dura-Ace Di2 12-speed electronic shifting system, which provides instant gear changes.
Can I use a range extender battery?
Yes, Trek offers a bottle-cage mounted range extender battery pack that adds 210Wh of capacity.