2025 Specialized Tarmac SL8 SRAM vs 2023 Trek Madone SLR
The 47 is the Trek Madone SLR size closest to your 44 Specialized Tarmac SL8 SRAM. 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
Compared with the Specialized Tarmac SL8 SRAM in 44, the Trek Madone SLR in 47 places the top of the head tube 6 mm higher and 7 mm further forward, relative to the bottom bracket.
- Frame stack
- +6 mm
- Higher front end
- Frame reach
- +7 mm
- Longer frame reach
- Wheelbase
- +2 mm
- About the same
- Head angle
- +1.6°
- Steeper: sharper steering
- Chainstays
- ±0 mm
- About the same
The two frames
Specialized Tarmac SL8 SRAM, 44Trek Madone SLR, 47Drawn to scale and lined up at the bottom bracket.
Geometry side by side
| Measurement | Specialized Tarmac SL8 SRAM 44 | Trek Madone SLR 47 | Difference |
|---|---|---|---|
| Reach | 366mm | 373 | +7 mm |
| Stack | 501mm | 507 | +6 mm |
| Head tube angle | 70.5° | 72.1 | +1.6° |
| Seat tube angle | 75.5° | 74.6 | −0.9° |
| Effective top tube | 496mm | 512 | +16 mm |
| Chainstay length | 410mm | 410 | ±0 mm |
| Wheelbase | 970mm | 972 | +2 mm |
| BB drop | 74mm | 72 | −2 mm |
| BB height | 266mm | not listed | |
| Standover | 723mm | 692 | −31 mm |
| Seat tube length | 433mm | 424 | −9 mm |
| Fork length | 370mm | not listed | |
| Head tube length | 99mm | 100 | +1 mm |
Differences are the Trek Madone SLR minus the Specialized Tarmac SL8 SRAM. Full charts: 2025 Specialized Tarmac SL8 SRAM, 2023 Trek Madone SLR.
Where each sits in its class
Specialized Tarmac SL8 SRAMTrek Madone SLR
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 SRAMS-Works - SRAM RED AXS | Trek Madone SLRSLR 6 |
|---|---|---|
| Frame | Specialized S-Works Tarmac SL8 FACT | Trek Madone |
| Shifter | SRAM RED AXS | Shimano Ultegra |
| Cassette | SRAM RED XG-1290 | Shimano Ultegra |
| Chain | SRAM RED | Shimano 105 DI2 |
| Crankset | SRAM RED AXS Power Meter | Shimano Ultegra Mid Compact |
| Bottom bracket | SRAM DUB | Trek T47 |
| Wheelset | Roval Rapide CLX II | Bontrager Aeolus Pro 51 |
| Tire | Specialized S-Works Turbo Rapidair 2Br | Bontrager R3 Hard-Case Lite |
| Brake | SRAM Red AXS | Shimano Ultegra |
| Handlebar | Roval Rapide Cockpit | Trek Madone Integrated |
| Stem | Roval Rapide Cockpit | Trek Madone aero |
| Saddle | Specialized S-Works Power | Bontrager Aeolus Elite |
| Fork | not listed | Trek Madone KVF |
| Derailleur | not listed | Shimano Ultegra |
| Chainring | not listed | Shimano Ultegra |
| Rotor | not listed | Shimano Ultegra |
| Seatpost | not listed | Trek Madone |
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
