The Domane+ SLR\u2019s lightweight design was made possible thanks to a combination of an ultra-lightweight carbon frame, a minimalist electric motor, and a small battery pack, among other gram-saving design choices.<\/p>\n
The Domane+ SLR is the first Trek bike to take advantage of the company\u2019s highest-level 800 series carbon frame, previously only used on the manufacturer\u2019s pedal bikes. <\/p>\n
That frame is said to have saved 700g compared to the frame used on Trek\u2019s previous Domane+ e-bike, or around 6% of the bike\u2019s overall mass.<\/p>\n The bike employs the TQ-HPR50 e-bike drive system, a lesser known but sophisticated e-bike drive powertrain developed by the German TQ Group. It puts out 50 Nm of torque, which isn\u2019t exactly gear melting but should be sufficient for the type of electric gentle assist riding that most road bikers are seeking.<\/p>\n The motor is capable of speeds of up to 45 km\/h (28 mph) when integrated into e-bikes destined for the US market, and it appears the Trek will allow the Domane+ SLR to take advantage of that higher speed in the US. In Europe, the bike will still be limited to 25 km\/h (15.5 mph) to comply with local regulations.<\/p>\n The bike will sport a 360Wh battery, which the company says should be sufficient for 100 km (62 miles) of assisted riding. That range may be possible in the lowest power mode, but riders taking advantage of the higher end of the bike\u2019s 300W output will likely achieve lower range figures per charge. The bike\u2019s three power modes can be selected using shifter buttons on the bar hoods, allowing riders to keep their hands in place while adjusting the motor\u2019s assistance level.<\/p>\n Trek also offers a 160 Wh range extender battery that fits in the water bottle cage and can add nearly 50% more battery capacity to the bike. That auxiliary battery option, which costs an extra $599, could prove popular for riders who enjoy bikepacking or simply want to push harder and farther on their fitness rides.<\/p>\n While the Domane+ SLR is designed as a road e-bike, its allowance for tires up to 40mm wide could offer decent utility as a gravel e-bike as well. <\/p>\n We\u2019ve seen that with other top-end electric road bikes like the Specialized Turbo Creo SL<\/a>, which has been known to serve double duty as an electric road bike and gravel e-bike, depending on the loadout.<\/p>\n The bike\u2019s integrated battery and hidden bottom bracket motor make the bike largely indistinguishable from many pedal bikes, at least at a quick glance.<\/p>\n One of the few giveaways of the bike\u2019s electric nature is the digital display built into the upper surface of the top tube, which helps keep the handlebars free of digital clutter.<\/p>\n![\"trek](\"https:\/\/electrek.co\/wp-content\/uploads\/sites\/3\/2022\/10\/trek-domane-plus.jpg?quality=82&strip=all&w=1000\" "\\"Trek")
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