2025 Trek Domane AL 4 Gen 4 vs 2026 Giant Contend AR
The XS is the Giant Contend AR size closest to your 49 Trek Domane AL 4 Gen 4. We match frame stack and reach. This is a geometry comparison, not a fit recommendation; stem, spacers, handlebars and saddle setup also affect your riding position.
What changes on the Giant Contend AR
Compared with the Trek Domane AL 4 Gen 4 in 49, the Giant Contend AR in XS places the top of the head tube 19 mm higher and 7 mm further forward, relative to the bottom bracket.
- Frame stack
- +19 mm
- Higher front end
- Frame reach
- +7 mm
- Longer frame reach
- Wheelbase
- +2 mm
- About the same
- Head angle
- +1.0°
- Steeper: sharper steering
- Chainstays
- −3 mm
- Shorter: livelier
The two frames
We can't draw these frames yet. The Trek Domane AL 4 Gen 4 numbers we have for size 49 are missing the seat angle. The numbers below still compare.
Geometry side by side
| Measurement | Trek Domane AL 4 Gen 4 49 | Giant Contend AR XS | Difference |
|---|---|---|---|
| Reach | 368 | 375 | +7 mm |
| Stack | 540 | 559 | +19 mm |
| Head tube angle | 70.8° | 71.8 | +1.0° |
| Effective top tube | 516 | 535 | +19 mm |
| Chainstay length | 425 | 422 | −3 mm |
| Wheelbase | 1001 | 1003 | +2 mm |
| BB drop | 80 | 80 | ±0 mm |
| Standover | 717 | 759 | +42 mm |
| Seat tube length | 440 | 465 | +25 mm |
| Head tube length | 123 | 135 | +12 mm |
| Seat tube angle | not listed | 74.0 |
Differences are the Giant Contend AR minus the Trek Domane AL 4 Gen 4. Full charts: 2025 Trek Domane AL 4 Gen 4, 2026 Giant Contend AR.
Where each sits in its class
Trek Domane AL 4 Gen 4Giant Contend AR
Each bike is ranked against the other road bikes on Quiver, on frame geometry alone. Not your hand position or ride feel.
What each ships with
The stock build of each bike's first listed trim. Parts that match are dimmed.
| Part | Trek Domane AL 4 Gen 4Gen 4 | Giant Contend ARAR 1 |
|---|---|---|
| Frame | Trek Domane AL | Giant Contend |
| Fork | Trek Domane AL | Giant Advanced-Grade Composite, full-composite OverDrive steerer, 12x100mm thru-axle, disc |
| Shifter | Shimano Tiagra | Shimano 105 Di2 |
| Derailleur | Shimano Tiagra | Shimano 105 Di2 |
| Cassette | Shimano HG500 | Shimano 105 |
| Chain | Shimano HG54 Tiagra | KMC X12L-1 |
| Crankset | Shimano Tiagra | Shimano 105 |
| Chainring | Shimano Tiagra | not listed |
| Bottom bracket | Shimano RS501 | Shimano BB-RS501 |
| Wheelset | Bontrager Paradigm 23 | Giant P-R2 Disc |
| Tire | Bontrager Kwaremont Comp | Giant Gavia Fondo 2 |
| Hub | Formula RX-512, Formula RX-142 | not listed |
| Rim | Bontrager Paradigm SL | not listed |
| Brake | Shimano Tiagra | Shimano 105 Di2 |
| Rotor | Shimano SM-RT66 | Giant MPH |
| Handlebar | Bontrager Comp | Giant D-Fuse SL |
| Stem | Bontrager Elite | Giant Contact |
| Bar tape | Bontrager Supertack Performance | not listed |
| Seatpost | Bontrager Comp | Giant D-Fuse |
| Saddle | Bontrager Verse Short | Giant Approach |
| Grips | not listed | Velo Cork tape with gel |
| Headset | not listed | Giant OverDrive |
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