Trek has introduced the Domane+ SLR electric road bike, a high-specification e-road bike with an unprecedented speed-to-weight ratio that allows riders to ride for the feel of a regular road bike, but with a little extra assist when needed, Or it is targeted at road riders who want support for longer rides.

According to Trek, the Domane SLR+ will not feel, sound, or look like an e-bike, especially with its quiet motor, low weight, and road-specific tuning with endurance geometry that ensures it feels like a regular road bike.

The frame is manufactured in the brand's top-of-the-line carbon fiber OCLV 800, which contributes to the overall weight reduction. The result is a weight of about 11.8 kg (28 lbs.), which is about 3 lbs. lighter than Trek's other electric road bikes.

The bike will be available in two "spec concepts": the first will feature a Shimano 2x groupset and 32mm Bontrager R3 road tubeless tires, making it a contender in our Best Electric Road Bikes guide. The other bike will be the Best Electric Gravel Bike, using a SRAM 1x XPLR groupset and Bontrager GR1 40mm tubeless gravel tires. Tire clearance is increased over the regular Domane, with space for up to 40mm tires, plus a guaranteed 6mm clearance all the way around when mounted.

The heart of the Domane+ SLR is the 3.9 kg TQ motor, whose compact size contributes to the bike's clean, integrated look. the Domane is equipped with a harmonic pin ring e-bike motor patented by the German specialist TQ. The Domane is equipped with a Harmonic Pin Ring e-bike motor patented by German specialist TQ. It is said to be the quietest motor Trek has ever installed and should make the bike unobtrusive on group rides.

The bike has a top speed limit of 28 mph in the U.S. and 25 mph in Europe, where laws are slightly different, and is powered by a 360 watt-per-hour battery with a total range of 60 miles and a maximum continuous power output of 250 watts and peak output of 300 watts, along with 50 nm of torque to help riders get up to speed. The battery has a total range of 60 miles, a maximum continuous power output of 250 watts, and a peak power output of 300 watts, along with 50 nm of torque. An optional battery extender with a 160 watt-per-hour bottle cage is also available. Because the focus is on road bike performance, there is no walk assist function.

Despite the motor, the bottom bracket width is 135 mm and the Q-factor is 163 mm, which aids the feel of a regular road bike.

Since this is still a Domane, the SLR has most of the standard Domane features. Namely, it has IsoSpeed technology in the rear, full hide fender mounts, and RCS cockpit integration. All handlebars are compatible with the stock stem, so there is no need to use proprietary bars. To make room for the battery, the Domane+ SLR has no downtube storage space.

A 2-inch LCD display built into the top tube allows riders to monitor range, battery charge, and speed; Eco, Mid, and High motor settings can be adjusted using buttons built into the hood or the Trek Central app on a smartphone. When attached to the bars, activity tracking and real-time range calculations can be performed on the fly.

The SRAM eTap can also be charged from the bike's battery when used with the SRAM eTap.

The Domane +SLR will be centered around the same OCLV 800 frame that all bikes will use, with several color variations and a total of six model options. Three models will be available for each of the above specs/concepts. On the road, the SLR 9 will be equipped with Dura-Ace Di2, the SLR 7 with Ultegra Di2, and the SLR 6 with 105 Di2. Gravel-specific models will feature SRAM, with Red, Force, and Rival eTap AXS, respectively.

Prices start at $8,499.99 / £8,340.00 for the Domane+ SLR 6 and go up to $12,999.99 / £12,900.00 for the top-spec Domane+ SLR 9 eTap model.

The Domane+ SLR will be available worldwide through trekbikes.com and Trek's retail partner network.