2023 Specialized Tarmac SL7 Comp vs 2025 Trek Madone SLR Gen 8
The S is the Trek Madone SLR Gen 8 size closest to your 49 Specialized Tarmac SL7 Comp. 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 Trek Madone SLR Gen 8
Compared with the Specialized Tarmac SL7 Comp in 49, the Trek Madone SLR Gen 8 in S places the top of the head tube 8 mm higher and 6 mm further forward, relative to the bottom bracket. Its wheelbase is 3 mm longer, which can contribute to stability at speed.
- Frame stack
- +8 mm
- Higher front end
- Frame reach
- +6 mm
- Longer frame reach
- Wheelbase
- +3 mm
- Longer: steadier at speed
- Head angle
- +0.5°
- Steeper: sharper steering
- Chainstays
- ±0 mm
- About the same
The two frames
Only the Specialized Tarmac SL7 Comp is drawn. The Trek Madone SLR Gen 8 numbers we have for size S are missing the seat angle.
Geometry side by side
| Measurement | Specialized Tarmac SL7 Comp 49 | Trek Madone SLR Gen 8 S | Difference |
|---|---|---|---|
| Reach | 372mm | 378 | +6 mm |
| Stack | 522mm | 530 | +8 mm |
| Head tube angle | 71.75° | 72.2 | +0.5° |
| Seat tube angle | 75.5° | not listed | |
| Chainstay length | 410mm | 410 | ±0 mm |
| Wheelbase | 973mm | 976 | +3 mm |
| BB drop | 74mm | 72 | −2 mm |
| BB height | 266mm | not listed | |
| Standover | 735mm | 734 | −1 mm |
| Seat tube length | 447mm | 440 | −7 mm |
| Fork length | 366mm | not listed | |
| Head tube length | 102mm | 121 | +19 mm |
| Effective top tube | not listed | 532 |
Differences are the Trek Madone SLR Gen 8 minus the Specialized Tarmac SL7 Comp. Full charts: 2023 Specialized Tarmac SL7 Comp, 2025 Trek Madone SLR Gen 8.
Where each sits in its class
Specialized Tarmac SL7 CompTrek Madone SLR Gen 8
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 | Specialized Tarmac SL7 CompComp | Trek Madone SLR Gen 8SLR 7 Gen 8 |
|---|---|---|
| Frame | Specialized Tarmac SL7 FACT | not listed |
| Shifter | Shimano 105 R7170 | not listed |
| Derailleur | Shimano 105 R7170 | not listed |
| Cassette | Shimano 105 | not listed |
| Chain | Shimano SLX M7100 | not listed |
| Crankset | Shimano 105 | not listed |
| Wheelset | DT Swiss R470 | Bontrager Aeolus Pro 51 |
| Tire | Specialized Turbo Pro | Pirelli P Zero |
| Brake | Shimano 105 R7170 | not listed |
| Seatpost | Specialized S-Works Tarmac | not listed |
| Saddle | Specialized Power Sport | not listed |
| Fork | not listed | Trek Madone Gen 8 one-piece |
| Handlebar | not listed | Trek RSL |
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