Trek hasn't officially launched an e-bike version of the Domane endurance bike yet, but it looks certain there's one coming, as the bike has popped up on the JE James website.

What do we know? Well, quite a lot thanks to the detailed spec offered up. "This bike has a 'go anywhere, do anything' mentality, which makes it the perfect companion for your most epic road adventures", says the description. "Road-smoothing IsoSpeed absorbs fatiguing bumps in the road for a faster, smoother, more comfortable ride. The seatmast cap has an integrated rear Daytime Running Light with Flare R internals, and it runs off the Bosch battery. Domane+ is a bike that brings people together: the powerful Bosch system gives you a boost so you can ride with faster friends."

Not for Trek the lower-power, lower-weight route; the £4,500 Domane+ is going for the full fat option, with a Bosch Performance Line motor and a 500Wh PowerTube internal battery in a 500 Series OCLV carbon frame. "Trek's Removable Integrated Battery (RIB) system looks great and is super user-friendly: it fully hides the battery in the frame and makes it easy to remove the battery without tools", says the bike spiel. Interestingly the motor here is listed as the 350W Performance Speed unit, which would make the bike as specced illegal in the UK; at least, without a moped helmet and a license plate.

Other than the fact that it contains a battery the frame seems to be closely modelled on the non-powered Domane, and it features the IsoSpeed decoupler that allows the seat tube to move relative to the top tube and seatstays to give extra comfort. The bike will likely be offered in a range of builds but the £4,500 spec is a SRAM Force 1 groupset, Bontrager Paradign Disc wheels and big-chamber WTB Exposure 700x36c tyres.

We don't have a release date for the bike yet, or even any official confirmation that it exists. but when we know more we'll be sure to let you know.

(spec subject to change without notice)

Domane+ full spec