Trek Domane AL 4 Gen 4 2026 - Road Bike
The Domane AL 4 Gen 4 is a lightweight, confidence-inspiring road bike with Shimano Tiagra shifting, disc brakes and a comfort-focused geometry—great for new riders, commuters and anyone keen to explore beyond the tarmac.
Key Features
- 100 Series Alpha Aluminium frame with endurance road geometry
- Domane AL carbon fork with tapered carbon steerer
- Shimano Tiagra 4700 2x10-speed drivetrain
- Shimano Tiagra hydraulic disc brakes, flat mount
- Bontrager Paradigm SL wheels with R1 32mm tyres
- Top tube, mudguard and rack mounts add versatility
- Available with 0% APR finance
The Trek Domane AL 4 Gen 4 is built to make road cycling more accessible and enjoyable—whether you're setting out on weekend rides, commuting to work or joining a local group ride. Its 100 Series Alpha Aluminium frame features refined tube shapes and fully internal cable routing for a smooth, clean look. Combined with a full carbon fork, it offers confident handling and vibration damping that enhances comfort mile after mile.
Shifting is taken care of by a Shimano Tiagra 2x10-speed drivetrain, delivering precise, reliable performance with gearing that’s well-suited to rolling roads and steeper climbs alike. Paired with Shimano Tiagra hydraulic disc brakes, you get powerful, consistent braking that helps build confidence, especially in changeable conditions.
The bike rolls on durable Bontrager Paradigm SL wheels fitted with 700x32mm Bontrager R1 Hard-Case Lite tyres—giving you plenty of cushioning on rougher roads and the flexibility to explore rail trails or crushed gravel paths. You’ll also find tyre clearance up to 38mm, should you want even more grip and comfort.
Trek have designed this Domane with practicality in mind: rack, mudguard and top tube mounts allow you to customise it for commuting, light touring or long day rides. Whether you're chasing fitness goals, exploring new lanes or just starting your cycling journey, the Domane AL 4 is a smart, approachable, and fully featured road bike to grow with your ambitions.
Occasionally, without notice, manufacturers change product design and/or specifications.
| Frame | 100 Series Alpha Aluminium, tapered head tube, internal routing, mudguard mounts, flat-mount disc, UDH, 142x12 mm thru axle |
| Fork | Domane AL carbon, tapered carbon steerer, internal brake routing, fender mounts, flat mount disc, 12x100mm thru axle |
| Stem | Bontrager Elite, 31.8 mm, Blendr-compatible, 7-degree, 70 mm length |
| Bars | Bontrager Comp, alloy, 31.8 mm, 80 mm reach, 121 mm drop, 36 cm control width, 40 cm drop width // Bontrager Comp VR-S, alloy, 31.8 mm, 81 mm reach, 118 mm drop, 38 cm width |
| Front Brake | Shimano Tiagra hydraulic disc, flat mount |
| Rear Brake | Shimano Tiagra hydraulic disc, flat mount |
| Front Mech | Shimano Tiagra 4700, 31.8 mm clamp |
| Rear Mech | Shimano Tiagra 4700, long cage, 34T max cog |
| Shifters | Shimano Tiagra R4720, 10-speed |
| Speed | 20 |
| Rims | Bontrager Paradigm SL, Tubeless Ready, 24-hole, 21 mm width, Presta valve |
| Front Hub | Formula RX-512 alloy, 6-bolt, 100x12 mm thru axle |
| Rear Hub | Formula RX-142 alloy, 6-bolt, Shimano 11-speed freehub, 142x12 mm thru axle |
| Front Tyre | Bontrager R1 Hard-Case Lite, wire bead, 60 tpi, 700x32 mm |
| Rear Tyre | Bontrager R1 Hard-Case Lite, wire bead, 60 tpi, 700x32 mm |
| Seat Post | Bontrager Comp, 6061 alloy, 27.2 mm, 8 mm offset, 250 mm length |
| Saddle | Verse Short, steel rails, 145 mm width |
| Chainset | Shimano Tiagra 4700, 50/34, 165 mm length |
| Bottom Bracket | Shimano RS501 BSA |
| Chain | Shimano Tiagra HG54, 10-speed |
| Cassette | Shimano 10-speed, 11-32T |
Trek Domane AL Gen 4 Sizing Guide
| Size | Height cm | Height Feet / Inches | Inseam cm | Inseam Inches |
|---|---|---|---|---|
| 44 | 150 - 153 cm | 4'11" - 5'0" | 71 - 73cm | 28" - 29" |
| 49 | 158 - 163 cm | 5'1" - 5'4" | 74 - 77 cm | 29" - 30" |
| 52 | 163 - 168 cm | 5'4" - 5'6" | 76 - 79 cm | 30" - 31" |
| 54 | 168 - 174 cm | 5'6" - 5'9" | 78 - 82 cm | 31" - 32" |
| 56 | 174 - 180 cm | 5'9" - 5'11" | 81 - 85 cm | 32" - 33" |
| 58 | 180 - 185 cm | 5'11" - 6'1" | 84 - 87 cm | 33" - 34" |
| 60 | 185 - 190 cm | 6'1" - 6'3" | 86 - 90 cm | 34" - 35" |
What size frame do I need if I am between sizes? - read here
Trek Domane AL Gen 4 Geometry Chart
| Size | 44cm | 49cm | 52cm | 54cm | 56cm | 58cm | 61cm |
|---|---|---|---|---|---|---|---|
| Stack | 510 | 540 | 561 | 575 | 591 | 611 | 646 |
| Reach | 360 | 368 | 371 | 374 | 377 | 380 | 385 |
| Head Tube Length | 95 | 123 | 145 | 160 | 175 | 195 | 235 |
| Head Tube Angle | 70.3° | 70.8° | 71.3° | 71.3° | 71.9° | 72.0° | 72.1° |
| Bottom Bracket Drop | 80 | 80 | 80 | 80 | 78 | 78 | 75 |
| Trail | 66 | 66 | 59 | 59 | 61 | 60 | 63 |
| Fork Rake/Offset | 53 | 53 | 53 | 53 | 48 | 48 | 48 |
| Chainstay Length | 420 | 425 | 420 | 420 | 420 | 425 | 425 |
| Wheelbase | 983 | 1001 | 100.3 | 101.0 | 101.8 | 102.2 | 103.8 |
| Top Tube Length (horizontal) | 505 | 516 | 530 | 542 | 554 | 567 | 586 |
| Standover Height | 657 | 717 | 735 | 754 | 776 | 796 | 842 |
| Seat Tube Length | 390 | 440 | 475 | 500 | 525 | 548 | 576 |
| Seat Tube Angle | 74.6° | 74.6° | 74.2° | 73.7° | 73.3° | 73.0° | 72.7° |
All measurements are in mm unless otherwise stated.
The above table shows the standard geometry for the bicycle as shipped, other geometry configurations may be available with certain bikes. Please contact us via Live Chat to find out more.
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Trek Domane AL 4 Gen 4 2026 - Road Bike
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