2025 Trek Domane SL Gen 4 vs 2026 Giant Contend AR
The M is the Giant Contend AR size closest to your 58 Trek Domane SL 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 SL Gen 4 in 58, the Giant Contend AR in M places the top of the head tube 16 mm lower and 3 mm further forward, relative to the bottom bracket. Its wheelbase is 7 mm shorter, which can contribute to quicker direction changes.
- Frame stack
- −16 mm
- Lower front end
- Frame reach
- +3 mm
- Longer frame reach
- Wheelbase
- −7 mm
- Shorter: quicker to change direction
- Head angle
- +0.5°
- Steeper: sharper steering
- Chainstays
- −3 mm
- Shorter: livelier
The two frames
We can't draw these frames yet. The Trek Domane SL Gen 4 numbers we have for size 58 are missing the seat angle. The numbers below still compare.
Geometry side by side
| Measurement | Trek Domane SL Gen 4 58 | Giant Contend AR M | Difference |
|---|---|---|---|
| Reach | 380 | 383 | +3 mm |
| Stack | 611 | 595 | −16 mm |
| Head tube angle | 72.0° | 72.5 | +0.5° |
| Effective top tube | 567 | 565 | −2 mm |
| Chainstay length | 425 | 422 | −3 mm |
| Wheelbase | 1022 | 1015 | −7 mm |
| BB drop | 78 | 80 | +2 mm |
| Standover | 796 | 810 | +14 mm |
| Seat tube length | 548 | 535 | −13 mm |
| Head tube length | 195 | not listed | |
| Seat tube angle | not listed | 73.0 |
Differences are the Giant Contend AR minus the Trek Domane SL Gen 4. Full charts: 2025 Trek Domane SL Gen 4, 2026 Giant Contend AR.
Where each sits in its class
Trek Domane SL 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 SL Gen 4SL 5 Gen 4 | Giant Contend ARAR 1 |
|---|---|---|
| Frame | Trek Domane SL | Giant Contend |
| Fork | Trek Domane SL | Giant Advanced-Grade Composite, full-composite OverDrive steerer, 12x100mm thru-axle, disc |
| Shifter | Shimano 105 R7120 | Shimano 105 Di2 |
| Derailleur | Shimano 105 R7100 | Shimano 105 Di2 |
| Cassette | Shimano 105 R7101 | Shimano 105 |
| Chain | Shimano SLX M7100 | KMC X12L-1 |
| Crankset | Shimano 105 R7100 | Shimano 105 |
| Bottom bracket | Praxis T47 | Shimano BB-RS501 |
| Wheelset | Bontrager Paradigm SL | Giant P-R2 Disc |
| Tire | Bontrager R3 | Giant Gavia Fondo 2 |
| Rim | Bontrager Paradigm SL | not listed |
| Brake | Shimano Disc 105 | Shimano 105 Di2 |
| Rotor | Shimano SM-RT70 | Giant MPH |
| Handlebar | Bontrager IsoZone VR-SF | Giant D-Fuse SL |
| Stem | Trek RCS | Giant Contact |
| Bar tape | Bontrager Supertack Perf | not listed |
| Seatpost | Aero Carbon | Giant D-Fuse |
| Saddle | Bontrager Short Comp | Giant Approach |
| Bag | Bontrager BITS | not listed |
| Grips | not listed | Velo Cork tape with gel |
| Headset | not listed | Giant OverDrive |
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