2025 Specialized Tarmac SL8 LTD Bull TdF vs 2025 Trek Émonda ALR
The 50 is the Trek Émonda ALR size closest to your 52 Specialized Tarmac SL8 LTD Bull TdF. 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 Émonda ALR
Compared with the Specialized Tarmac SL8 LTD Bull TdF in 52, the Trek Émonda ALR in 50 places the top of the head tube 6 mm lower and about as far forward, relative to the bottom bracket.
- Frame stack
- −6 mm
- Lower front end
- Frame reach
- −2 mm
- About the same reach
- Wheelbase
- −1 mm
- About the same
- Head angle
- −0.4°
- Slacker: calmer steering
- Chainstays
- ±0 mm
- About the same
The two frames
Only the Specialized Tarmac SL8 LTD Bull TdF is drawn. The Trek Émonda ALR numbers we have for size 50 are missing the seat angle.
Geometry side by side
| Measurement | Specialized Tarmac SL8 LTD Bull TdF 52 | Trek Émonda ALR 50 | Difference |
|---|---|---|---|
| Reach | 380mm | 378 | −2 mm |
| Stack | 527mm | 521 | −6 mm |
| Head tube angle | 72.5° | 72.1° | −0.4° |
| Seat tube angle | 74° | not listed | |
| Chainstay length | 410mm | 410 | ±0 mm |
| Wheelbase | 975mm | 974 | −1 mm |
| BB drop | 74mm | 72 | −2 mm |
| BB height | 266mm | not listed | |
| Standover | 746mm | 711 | −35 mm |
| Seat tube length | 456mm | 453 | −3 mm |
| Fork length | 370mm | not listed | |
| Head tube length | 120mm | 111 | −9 mm |
| Effective top tube | not listed | 521 |
Differences are the Trek Émonda ALR minus the Specialized Tarmac SL8 LTD Bull TdF. Full charts: 2025 Specialized Tarmac SL8 LTD Bull TdF, 2025 Trek Émonda ALR.
Where each sits in its class
Specialized Tarmac SL8 LTD Bull TdFTrek Émonda ALR
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 LTD Bull TdFS-Works LTD Red Bull 2025 TdF | Trek Émonda ALRALR 5 |
|---|---|---|
| Frame | Specialized S-Works Tarmac SL8 FACT | not listed |
| Shifter | SRAM RED AXS | not listed |
| Derailleur | SRAM RED AXS E1, SRAM RED E1 | not listed |
| Cassette | SRAM RED XG-1290 E1 | not listed |
| Chain | SRAM Red | not listed |
| Crankset | SRAM RED AXS Power Meter | not listed |
| Bottom bracket | SRAM DUB | not listed |
| Wheelset | Roval Rapide CLX | Bontrager Paradigm SL |
| Tire | Specialized S-Works Turbo TLR | Bontrager R1 Hard-Case Lite |
| Brake | Specialized override | not listed |
| Handlebar | Roval Rapide Cockpit | not listed |
| Saddle | Specialized S-Works Power | not listed |
| Fork | not listed | Trek Émonda ALR |
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