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Great condition approved used bike with one cosmetic paint chip on the top tube
The 2021 Trek Domane SL 4 Road Bike is all about smooth riding, speed and versatility. The lightweight OCLV Carbon frame has both Front and Rear IsoSpeed to smooth out bumps in the road and reduce fatigue so you can stay stronger on long adventures. The Shimano Tiagra 10 speed gears and hydraulic brakes give good performance at a budget friendly price.
The Domane SL 4 is built around a 500 Series OCLV Carbon frame with road-smoothing Front and Rear IsoSpeed. IsoSpeed works a little like suspension. It allows parts of the bike to decouple in a controlled way to absorb bumps, rather than sending a shock up through the frame. He effect is to smooth out bumpy roads and reduce the shock from potholes and cracks so you can carry your speed, keep the power down and not get as tired. The Domane bikes are race fast but designed to be used on long all-day adventures.
The Domane SL 4 comes with powerful flat-mount disc brakes, a full 2x10 Shimano Tiagra group set and tubeless-ready wheels with wider 700x32 tyres. Internal storage and cable routing add to the bike's capability and sleek look.
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| — | 47 | 50 | 52 | 54 | 56 | 58 | 60 | 62 |
|---|---|---|---|---|---|---|---|---|
| Rider Height (cm) | 152 - 158 | 158 - 163 | 163 - 168 | 168 - 174 | 174 - 180 | 180 - 185 | 185 - 190 | 190 - 195 |
| Rider Height (ft. in) | 5' - 5'2" | 5'2" - 5'4" | 5'4" - 5'6" | 5'6" - 5'9" | 5'9" - 5'11" | 5'11" - 6'1" | 6'1" - 6'3" | 6'3" - 6'5" |
| Seat Tube (ctr-top) | 424 | 453 | 483 | 496 | 525 | 553 | 573 | 593 |
| Seat Tube (ctr-ctr) | - | - | - | - | - | - | - | - |
| Effective Top Tube | 512 | 521 | 534 | 543 | 559 | 574 | 586 | 598 |
| Actual Top Tube | - | - | - | - | - | - | - | - |
| Seat Angle | 74.6° | 74.6° | 74.2° | 73.7° | 73.3° | 73.0° | 72.8° | 72.5° |
| Head Angle | 72.1° | 72.1° | 72.8° | 73.0° | 73.5° | 73.8° | 73.9° | 73.9° |
| Head Tube | 100 | 111 | 121 | 131 | 151 | 171 | 191 | 211 |
| Fork Rake | 68 | 62 | 58 | 56 | 58 | 57 | 56 | 56 |
| Chainstay | 410 | 410 | 410 | 410 | 410 | 411 | 411 | 412 |
| Wheelbase | 972 | 974 | 977 | 981 | 983 | 992 | 1001 | 1010 |
| Stack | 507 | 521 | 533 | 541 | 563 | 581 | 601 | 620 |
| Reach | 373 | 378 | 383 | 386 | 391 | 396 | 399 | 403 |

All measurements in mm unless otherwise stated
The charts show Trek's recommended sizes based on height, but there are some other factors, like arm and leg length, that determine a great fit. That’s why you’ll see some overlap in our recommendations. Not every rider who’s 5´8˝, for example, will fit on the same size bike.
Should you have any specific questions, please contact us for information and talk to one of our experienced members of staff.
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Free UK delivery on orders over £50. Orders are dispatched within 1-2 working days and typically arrive 1-2 working days later.
Return unused items in their original packaging within 30 days of delivery. Return postage is £3.50.
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Founded in a Wisconsin barn in 1976, Trek has grown into one of the world's most recognised bicycle brands without losing the obsession that started it all: build the best bike, ride it further, share it with everyone.
Trek believes the bicycle is a simple solution to many of the world's most complicated problems. Every bike Trek builds — from the Madone race weapon to the Marlin trail bike — is made with that conviction. More riders, more often, on better bikes.