2026 Specialized Tarmac SL8 Pro Shimano vs 2024 Trek Emonda SLR
The 47 is the Trek Emonda SLR size closest to your 49 Specialized Tarmac SL8 Pro Shimano. 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 Emonda SLR
Compared with the Specialized Tarmac SL8 Pro Shimano in 49, the Trek Emonda SLR in 47 places the top of the head tube 7 mm lower and about as far forward, relative to the bottom bracket.
- Frame stack
- −7 mm
- Lower front end
- Frame reach
- −2 mm
- About the same reach
- Wheelbase
- −1 mm
- About the same
- Head angle
- n/a
- One of the bikes has no number for this
- Chainstays
- ±0 mm
- About the same
The two frames
We can't draw these frames yet. The Specialized Tarmac SL8 Pro Shimano numbers we have for size 49 are missing the head angle. The numbers below still compare.
Geometry side by side
| Measurement | Specialized Tarmac SL8 Pro Shimano 49 | Trek Emonda SLR 47 | Difference |
|---|---|---|---|
| Reach | 375 | 373 | −2 mm |
| Stack | 514 | 507 | −7 mm |
| Head tube angle | not listed | 72.1° | |
| Seat tube angle | 75.5 | not listed | |
| Chainstay length | 410 | 410 | ±0 mm |
| Wheelbase | 973 | 972 | −1 mm |
| Head tube length | 109 | 100 | −9 mm |
| Effective top tube | not listed | 512 | |
| BB drop | not listed | 72 | |
| Standover | not listed | 692 | |
| Seat tube length | not listed | 424 |
Differences are the Trek Emonda SLR minus the Specialized Tarmac SL8 Pro Shimano. Full charts: 2026 Specialized Tarmac SL8 Pro Shimano, 2024 Trek Emonda SLR.
Where each sits in its class
Specialized Tarmac SL8 Pro ShimanoTrek Emonda 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 Pro ShimanoPro - Shimano Ultegra Di2 | Trek Emonda SLRSLR 6 AXS |
|---|---|---|
| Frame | Specialized Tarmac SL8 | Trek Emonda SLR |
| Fork | Specialized FACT 10r | not listed |
| Shifter | Shimano Ultegra R8170 | SRAM ETAP Rival |
| Derailleur | Shimano Ultegra R8150 Di2 | SRAM eTap Rival AXS |
| Cassette | Shimano Ultegra | SRAM XG1250 Rival |
| Chain | Shimano XT M8100 | SRAM Rival |
| Crankset | Shimano Ultegra R81000 | SRAM AXS Rival |
| Bottom bracket | Shimano Threaded BSA | not listed |
| Wheelset | Roval Rapide CL III | Bontrager Aeolus Pro 37 |
| Tire | Specialized S-Works Turbo | Bontrager R3 |
| Brake | Shimano Ultegra R8170 | SRAM Paceline |
| Rotor | Shimano Ultegra R8170 | SRAM Paceline |
| Handlebar | Roval Rapide Cockpit | Bontrager Aeolus RSL Integrated |
| Stem | Roval Rapide Cockpit | not listed |
| Bar tape | Supacaz Super Sticky Kush | not listed |
| Seatpost | Specialized S-Works Tarmac SL8 | Bontrager Seat Mast Cap |
| Saddle | Specialized Power Pro | Bontrager Aeolus P2 |
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