The Domane SL 4 is a lightweight carbon endurance road bike built for smooth miles and everyday versatility. Its 500 Series OCLV Carbon frame, comfort-focused geometry, and clearance for wider tyres help smooth rough roads and reduce fatigue on long rides. A Shimano Tiagra 2x11 drivetrain provides dependable shifting, while integrated mounts and all-road capability make it ready for group rides, fast commutes, or light gravel detours.
Specifications
| Frame | 500 Series OCLV Carbon, internal cable routing, integrated frame bag mounts, T47, integrated chain keeper, mudguard mounts, flat mount disc, UDH 142x12mm thru axle |
| Fork | Domane SL carbon, tapered carbon steerer, internal brake routing, fender mounts, flat mount disc, carbon dropouts, 12x100mm thru axle |
| Shifter | Shimano Tiagra R4020 |
| Front derailleur | Shimano Tiagra R4000, braze-on, down swing |
| Rear derailleur | Shimano Tiagra R4000 |
| Crank | Shimano Tiagra R4000, 50/34T |
| Crank length | S, M, ML: 165mm L, XL: 170mm |
| Bottom bracket | Praxis, T47 threaded, internal bearing |
| Cassette | Shimano RS400, 11-36T, 11-speed |
| Chain | Shimano LG500 |
| Max chainring size | 1x: 48T, 2x: 52T |
| Front hub | Formula RX-512 alloy, 6-bolt, 100x12mm thru axle |
| Rear hub | Formula RX-142 alloy, 6-bolt, Shimano 11-speed freehub, 142x12mm thru axle |
| Front axle | Bontrager Switch chamfered thru axle |
| Rear axle | Bontrager Switch chamfered thru axle, removable lever |
| Rim | Bontrager Paradigm 23, Tubeless Ready, 24-hole, 23mm width, Presta valve |
| Tyre | Bontrager Kwaremont Comp, Hard-Case Lite, wire bead, 60 TPI, 700x32mm |
| Max tyre size | 40mm |
| Saddle | Verse Short, steel rails, 145mm width |
| Seatpost | Bontrager carbon, 27.2mm, 8mm offset, 330mm length |
| Handlebar | S: Bontrager Comp Riser, alloy, 20mm rise, 31.8mm, 70mm reach, 38cm width M, ML: 40cm width L, XL: 42cm width |
| Handlebar tape | Trek gel cork |
| Stem | S: 90mm M: 100mm ML, L: 110mm XL: 120mm Bontrager Elite, 31.8mm, Blendr-compatible, 7-degree |
| Brake rotor | Tektro TR160, 6-bolt, 160mm |
| Max brake rotor size | 180mm front, 160mm rear |
| Bike weight (ML) | 9.10 kg / 20.07 lbs (with TLR sealant, no tubes) |
| Weight limit | 125 kg / 275 lbs total — bike + rider + cargo |
Specifications may vary by frame size. Product information, specifications, equipment, materials, colours and pricing may change without notice. Compatible components may be substituted due to supply chain availability.
Sizing and geometry
Sizing
| Size | XS (47cm) | S (50cm) | M (52-54cm) | ML (56cm) | L (58cm) | XL (60-62cm) |
|---|---|---|---|---|---|---|
| Rider height | 143 – 158cm / 4'8" – 5'2" | 158 – 162cm / 5'2" – 5'4" | 162 – 173cm / 5'4" – 5'8" | 173 – 179cm / 5'8" – 5'10" | 179 – 188cm / 5'10" – 6'2" | 188 – 213cm / 6'2" – 7'0" |
| Inseam | 67 – 74cm / 26" – 29" | 74 – 76cm / 29" – 30" | 76 – 81cm / 30" – 32" | 81 – 84cm / 32" – 33" | 84 – 88cm / 33" – 35" | 88 – 100cm / 35" – 39" |
Frame geometry
Diagram illustrates Trek's standard geometry measurement points (A–N) used in the table below; frame silhouette shown is a generic Trek road frame and does not depict the Domane SL specifically.
| Size | XS (47cm) | S (50cm) | M (52-54cm) | ML (56cm) | L (58cm) | XL (60-62cm) |
|---|---|---|---|---|---|---|
| Stack | 52.4 | 55.5 | 57.5 | 59.6 | 61.8 | 64.8 |
| Reach | 36.8 | 37.1 | 37.4 | 37.7 | 38.0 | 38.4 |
| Seat tube, C-T | 44.4 | 47.6 | 50.0 | 53.3 | 55.3 | 59.3 |
| Seat tube angle | 73.5° | 73.7° | 73.5° | 73.3° | 73.3° | 73.3° |
| Head tube angle | 71.3° | 71.1° | 71.2° | 71.9° | 72.0° | 72.1° |
| Head tube length | 10.6 | 13.9 | 15.9 | 17.0 | 19.2 | 22.6 |
| Bottom bracket drop | 8.0 | 8.0 | 8.0 | 7.8 | 7.8 | 7.5 |
| Chainstay length | 42.0 | 42.0 | 42.0 | 42.0 | 42.0 | 42.0 |
| Wheelbase | 98.7 | 100.2 | 101.1 | 101.0 | 101.9 | 103.3 |
| Standover height | 72.1 | 75.3 | 77.5 | 80.5 | 82.6 | 86.3 |
All measurements in cm unless stated otherwise. Geometry is for the Domane SL Gen 5 platform, shared across SL 4, SL 5, and SL 6 AXS.
Trek bicycles and Bontrager accessories are reserved online and collected in person — this ensures the right size, a proper bike fit and expert guidance before you ride away.
