Domane+ SLR 9 is our best carbon endurance e-road bike. It all starts with a featherweight 800 Series OCLV Carbon frame decked out with top-tier parts for the ultimate performance on every ride. You get the quiet, smooth boost of TQs HPR60 motor that makes long rides feel like a breeze. It comes equipped with a 2x12 Shimano Dura-Ace Di2 drivetrain for rapid-fire smooth shifts, Bontrager Aeolus RSL OCLV Carbon wheels, carbon cranks, a carbon seatpost, and carbon Bontrager Aero Pro handlebars that absorb vibrations from rough roads.Compact, quiet, and mighty e-systemThe TQ harmonic pin ring motor is super efficient with an amazing range-to-weight-to-speed ratio. Its ultra-compact, whisper-quiet, and offers an unbelievably natural-feeling assist up to 28 mph.Ultra-lightweightDomane+ SLR is our lightest e-bike ever, weighing only ~26 pounds thanks to our best and lightest 800 Series OCLV Carbon and a smart frame designed to shave weight.Designed to go the distanceAn integrated 360Wh battery is hidden in the downtube and offers an impressive range of around 60 miles in Eco mode.Optional Range ExtenderExplore farther with an optional 160Wh Range Extender that gives you an extended total range of around 90 miles in Eco mode. Want even more miles? The Trek Connect App lets you customize your assist to extend your range even more.The smooth advantageNewly refined IsoSpeed soaks up fatiguing bumps and saves weight so you can ride stronger longer.Real road feelA road-specific tune, narrow Q factor, and intuitive mode change buttons on the hoods make Domane+ SLR feel and handle like a traditional bike with the added benefits of electric. Frame 800 Series OCLV Carbon, TQ drive system, tapered head tube, rear IsoSpeed, internal routing, flat mount disc, fender mounts, 142x12mm thru axle Fork Domane+ carbon, tapered carbon steerer, internal brake routing, fender mounts, flat mount disc, 12x100mm thru axle Wheel Front Bontrager Aeolus RSL 37, OCLV Carbon, Tubeless Ready, 37mm rim depth, 100x12mm thru axle Wheel Rear Bontrager Aeolus RSL 37, OCLV Carbon, Tubeless Ready, 37mm rim depth, 142x12mm thru axle Tire Bontrager Kwaremont RSL TLR, tubeless ready, folding bead, Race Dual-Compound, 320 tpi, 700x32mm Tire Part Bontrager TLR sealant, 6oz Skewer Front Bontrager Switch thru axle Skewer Rear Bontrager Switch thru axle, removable lever Shifter Shimano Dura-Ace R9270 Di2, 12 speed Front Derailleur Shimano Dura-Ace R9250 Di2, braze-on, down swing Rear Derailleur Shimano Dura-Ace R9250 Di2, 34T max cog Crank Praxis Carbon, 172.5mm length Cassette Shimano Dura-Ace R9200, 11-34, 12 speed Chain Shimano Dura-Ace/XTR M9100, 12 speed Chainring Praxis, 50/34T, 12 speed Brake Shimano Dura-Ace hydraulic disc, flat mount Brake Rotor Shimano CL900, centerlock, 160mm Saddle Verse Short Pro, carbon rails, 145mm width Seatpost KVF aero carbon seatpost, 20mm offset, 320mm length Handlebar Bontrager Pro IsoCore VR-SF, 44cm Stem Trek RCS Pro, -7 degree, 110mm length Battery TQ 360Wh Motor TQ-HPR60, 60 Nm, 300 watt maximum continuous rated power, 350 watt peak power Charger TQ 4A charger Geometry Chart B B Drop 7.5 Chainstay Length 43 Eff Top Tube 59.3 Frame Reach 38.6 Frame Size Number 62 cm Frame Stack 65.6 Head Angle 72.1° Head Tube Length 24.5 Offset 4.8 Saddle Rail Height Max Short 79.5 Saddle Rail Height Max Tall 82.5 Saddle Rail Height Min Short 73 Saddle Rail Height Min Tall 76 Seat Tube 58.6 Seat Tube Angle 72.5° Standover 84.7 Trail 6.2 Wheelbase 104.7 Wheel Size 700c