Trek calls the Domane+ SL Gen 5 its lightest e-bike ever. It’s a carbon endurance road bike with TQ’s smallest motor, the 40 Nm HPR40. Trek sells it in three builds. The SL 6 AXS is $6,499.99, the SL 7 AXS is $9,499.99 and the SL 9 AXS is $11,999.99. All three use the same frame, motor and battery. The parts, wheels and weight change as the price goes up. I haven’t ridden any of them. Below I compare them with the Trek FX+ 7S and the Specialized Turbo Vado SL 4.0 EQ, two light flat bar bikes with pages on this site, and with the Velotric T1 ST, which I filmed. Everything here comes from Trek’s product pages, checked on Oct 28, 2026 and linked at the bottom.
A smaller motor on purpose
The TQ-HPR40 is rated at 40 Nm and 200W peak. That’s less than the 60 Nm HPR60 in Trek’s aluminum Domane+ ALR. Trek says the HPR40 is lighter, smaller and quieter, and that it’s meant to keep the bike feeling like a regular road bike. It’s a Class 3 bike, so pedal assist runs to 28 mph. Trek doesn’t list a throttle. Some paths are closed to Class 3 bikes, and our e-bike laws hub and Class 2 vs Class 3 guide explain the rules.
The battery is a TQ 360Wh pack, and the bikes ship with a TQ 4A charger. Trek claims up to 70 miles. On the SL 7 and SL 9 pages, Trek says you can order a 580Wh battery through its Project One custom program for up to 115 miles. A TQ color display connects over Bluetooth and ANT+.
Comfort and everyday details
The frame is 500 Series OCLV Carbon with Trek’s Endurance Road fit. Trek adds a few touches for long rides:
- Riser bar. It has 20mm of rise to sit you up a bit more.
- Seatpost. A Bontrager RSL carbon post that Trek says flexes to take the edge off road buzz.
- Tires. 700x35mm, with room for up to 40mm.
- Lights. A Supernova Starstream Mini headlight and a Trek Flare C taillight, both powered by the main battery.
- Mounts. Fender mounts on the frame and fork, plus frame bag mounts and a UDH derailleur hanger.
The weight limit is 275 lb total, including the bike. Sizes run XS to XL. Trek doesn’t list pedals in the parts.
SL 6, SL 7 or SL 9
- SL 6 AXS, $6,499.99. SRAM Rival AXS 1x13 wireless shifting with a 10 to 46 cassette. Bontrager Paradigm Comp 25 alloy wheels, Kwaremont Pro tires and an alloy riser bar. 26.7 lb in size ML.
- SL 7 AXS, $9,499.99. SRAM Force AXS 1x13. Bontrager Aeolus Pro 37 carbon wheels with a DT Swiss 240 rear hub, Kwaremont RSL tires, a carbon riser bar and a carbon-railed saddle. 25.29 lb in size ML.
- SL 9 AXS, $11,999.99. SRAM RED AXS 1x13 and Aeolus RSL 37 carbon wheels, with the same RSL tires and carbon bar. 24.26 lb in size ML.
All three have a 44T chainring and 160mm rotors. Each SL 6 color and size is listed separately for stock. On Nov 3, 2026, two of the 12 were in stock online: XS in Matte Deep Smoke and XL in Matte Nightshade. The SL 7 and SL 9 were build to order in every size and color.
How it compares
Against the Trek FX+ 7S: it’s a flat bar bike with a TQ-HPR50 motor rated at 50 Nm, the same 360Wh battery size and 28 mph assist. It weighs about 41 lb and comes with a rack and fender. It was $3,199.93 on closeout on Oct 28, 2026. The Domane+ SL is about 14 to 17 lb lighter as listed and uses drop bars, but it costs at least twice as much.
Against the Specialized Turbo Vado SL 4.0 EQ: it’s another light flat bar bike, with a 35 Nm motor, a 320Wh battery and assist to 28 mph. Specialized lists it at 36.6 lb and up to 80 miles, and it was $3,999.99 on Oct 26, 2026. The two bikes have similar motor and battery sizes. The Domane+ SL is built as a drop bar road bike and weighs about 10 lb less.
Against the Velotric T1 ST, which I filmed: it weighs 36 lb and has a 350W rear hub, a 353Wh battery and Class 1 assist to 20 mph. It’s the lightest e-bike I’ve filmed, and every Domane+ SL build is about 9 to 12 lb lighter as Trek lists them.
Within Trek’s own lineup, the aluminum Domane+ ALR has the stronger 60 Nm HPR60 motor and costs about $5,000. It weighs about 31.5 lb.
FAQ
Have I ridden the Domane+ SL Gen 5?
No. This page is based on Trek’s product pages, checked Oct 28, 2026.
How much does it weigh?
Trek lists 26.7 lb for the SL 6, 25.29 lb for the SL 7 and 24.26 lb for the SL 9, all in size ML and set up tubeless. In its feature text, Trek says builds start at 24.5 lb, which doesn’t match the 24.26 lb it lists for the SL 9.
What range does Trek claim?
Up to 70 miles with the 360Wh battery. Trek says the 580Wh Project One option goes up to 115 miles.
Does it come with lights?
Yes. Trek’s parts list includes a Supernova Starstream Mini headlight and a Trek Flare C taillight.
Can I buy an SL 7 or SL 9 off the shelf?
Not on Oct 28, 2026. Trek’s site listed both as build to order in every size and color.
Pros and cons (from the specs and sources)
Pros: 24.26 to 26.7 lb as listed; up to 70 mi claimed; 28 mph assist; lights powered by the main battery; riser bar and flexing seatpost; clears 40mm tires; fender and frame bag mounts; wireless 13 speed shifting on every build.
Cons: 40 Nm motor, less torque than the Domane+ ALR’s 60 Nm; $6,499.99 to $11,999.99; SL 6 mostly out of stock and SL 7 and SL 9 build to order on Nov 3, 2026; 275 lb total limit; pedals not listed; Class 3 limits some paths.
Who it’s for
On paper, the Domane+ SL suits road riders who want an e-bike that weighs close to a regular road bike, with a light assist for hills and long days rather than a strong push. If you want more torque for less money, the Domane+ ALR has the 60 Nm motor at about $5,000. If you want flat bars and a rack, the FX+ 7S is closer to what you need.
Price
As of Oct 28, 2026: Domane+ SL 6 AXS Gen 5 $6,499.99, Domane+ SL 7 AXS Gen 5 $9,499.99, Domane+ SL 9 AXS Gen 5 $11,999.99.
“The path of the righteous is level; you make level the way of the righteous.” Isaiah 26:7 (ESV)
