Domane+ SLR
Origin
The Domane+ SLR launched in 2023 as Trek's flagship lightweight electric road bike, built around the brand new TQ HPR50 motor — a German-engineered Harmonic Pin Ring transmission that hides inside the bottom bracket and delivers near-silent assist. Trek partnered with TQ to escape the visual and weight penalty of conventional mid-drives, and the result is an e-road bike that looks almost indistinguishable from the analog Domane SLR. The 800 Series OCLV Carbon frame carries Trek's rear IsoSpeed decoupler — endurance comfort tech born from Paris-Roubaix — so the bike doubles as a long-distance machine on rough pavement and light gravel up to 40 mm tires. A compact 360 Wh battery slips into a slim downtube and an optional 160 Wh range extender extends autonomy for all-day rides.
Specifications
- Frame
- 800 Series OCLV Carbon, high-step only, tapered head tube, internal routing, hidden fender mounts
- Weight
- kg
- Drivetrain
- Shimano 105 Di2 / Ultegra Di2 / Dura-Ace Di2 or SRAM Rival / Force / RED eTap AXS — all 12-speed electronic
- Brakes
- Hydraulic disc (SRAM RED / Shimano Di2 depending on build), 160 mm rotors, flat mount
- Wheels
- Bontrager Aeolus RSL 37V OCLV carbon, tubeless ready, 24-spoke (top builds)
The verdict
- Exceptionally light for a full-power e-road bike (~11.8-12 kg) — easy to carry, rack and pedal unassisted
- TQ HPR50 motor is near-silent and feels natural, with strong support at high cadence
- Looks almost identical to the analog Domane — stealthy integration, clean internal routing
- Rear IsoSpeed decoupler delivers real endurance comfort on rough pavement
- Full electronic groupset runs off the main bike battery (no separate Di2/AXS battery to charge)
- Very expensive — top builds reach ~€12,999
- Battery is semi-permanently fixed in the downtube; cannot be removed for indoor charging
- Proprietary flat-back seatpost blocks aftermarket/suspension seatpost upgrades
- Lower motor power and battery capacity than full-fat e-bikes — modest assist on steep climbs vs Bosch/Specialized SL
- High-step frame only; no low-standover option, and ships without pedals or kickstand mounts
Who it’s for
Related models
Where to buy Trek Domane+ SLR in Estonia
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