2024 Specialized Tarmac SL8 Ready to Paint vs 2026 Trek Madone SLR Gen 8
The Trek Madone SLR Gen 8 size closest to your 54 is the M. Compare the M instead
What changes on the Trek Madone SLR Gen 8
Compared with the Specialized Tarmac SL8 Ready to Paint in 54, the Trek Madone SLR Gen 8 in XS places the top of the head tube 45 mm lower and 11 mm further back, relative to the bottom bracket. Its wheelbase is 7 mm shorter, which can contribute to quicker direction changes.
- Frame stack
- −45 mm
- Lower front end
- Frame reach
- −11 mm
- Shorter frame reach
- Wheelbase
- −7 mm
- Shorter: quicker to change direction
- Head angle
- −1.4°
- Slacker: calmer steering
- Chainstays
- ±0 mm
- About the same
The two frames
Only the Specialized Tarmac SL8 Ready to Paint is drawn. The Trek Madone SLR Gen 8 numbers we have for size XS are missing the seat angle.
Geometry side by side
| Measurement | Specialized Tarmac SL8 Ready to Paint 54 | Trek Madone SLR Gen 8 XS | Difference |
|---|---|---|---|
| Reach | 381mm | 370 | −11 mm |
| Stack | 552mm | 507 | −45 mm |
| Head tube angle | 73° | 71.6° | −1.4° |
| Seat tube angle | 74° | not listed | |
| Chainstay length | 410mm | 410 | ±0 mm |
| Wheelbase | 978mm | 971 | −7 mm |
| BB drop | 72mm | 72 | ±0 mm |
| BB height | 268mm | not listed | |
| Standover | 768mm | 704 | −64 mm |
| Seat tube length | 473mm | 404 | −69 mm |
| Fork length | 370mm | not listed | |
| Head tube length | 137mm | 100 | −37 mm |
| Effective top tube | not listed | 517 |
Differences are the Trek Madone SLR Gen 8 minus the Specialized Tarmac SL8 Ready to Paint. Full charts: 2024 Specialized Tarmac SL8 Ready to Paint, 2026 Trek Madone SLR Gen 8.
Where each sits in its class
Specialized Tarmac SL8 Ready to PaintTrek 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 SL8 Ready to PaintS-Works Ready to Paint | Trek Madone SLR Gen 8SLR 7 AXS Gen 8 |
|---|---|---|
| Frame | Specialized S-Works Tarmac SL8 FACT | not listed |
| Fork | not listed | Trek Madone Gen 8 one-piece |
| Wheelset | not listed | Bontrager Aeolus Pro 51 |
| Tire | not listed | Pirelli P Zero |
| Handlebar | not listed | Trek RSL |
Know what is on every bike.
Add your bike to Quiver. Keep its parts, setup, and service history together, then share your build.
Explore the app
