2026 Specialized Tarmac SL8 vs 2025 Colnago Y1Rs
The XL is the Colnago Y1Rs size closest to your 61 Specialized Tarmac SL8. 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 Colnago Y1Rs
Compared with the Specialized Tarmac SL8 in 61, the Colnago Y1Rs in XL places the top of the head tube 22 mm lower and 4 mm further back, relative to the bottom bracket.
- Frame stack
- −22 mm
- Lower front end
- Frame reach
- −4 mm
- Shorter frame reach
- Wheelbase
- n/a
- One of the bikes has no number for this
- Head angle
- −0.5°
- Slacker: calmer steering
- Chainstays
- −2 mm
- About the same
The two frames
Only the Specialized Tarmac SL8 is drawn. The Colnago Y1Rs numbers we have for size XL are missing the wheelbase.
Geometry side by side
| Measurement | Specialized Tarmac SL8 61 | Colnago Y1Rs XL | Difference |
|---|---|---|---|
| Reach | 408mm | 404 | −4 mm |
| Stack | 612mm | 590 | −22 mm |
| Head tube angle | 74° | 73.5 | −0.5° |
| Seat tube angle | 73° | 73.0 | ±0.0° |
| Effective top tube | 595 | not listed | |
| Chainstay length | 410mm | 408 | −2 mm |
| Wheelbase | 1013mm | not listed | |
| BB drop | 72mm | 72 | ±0 mm |
| BB height | 268mm | not listed | |
| Standover | 834mm | not listed | |
| Seat tube length | 545mm | not listed | |
| Fork length | 370mm | 376.5 | +7 mm |
| Head tube length | 204mm | 176.5 | −28 mm |
Differences are the Colnago Y1Rs minus the Specialized Tarmac SL8. Full charts: 2026 Specialized Tarmac SL8, 2025 Colnago Y1Rs.
Where each sits in its class
Specialized Tarmac SL8Colnago Y1Rs
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 | Colnago Y1RsY1RS |
|---|---|---|
| Frame | not listed | Colnago Y1Rs |
| Shifter | not listed | Shimano Dura-Ace R9200 |
| Derailleur | not listed | Shimano Dura-Ace R9200 Di2 |
| Chain | not listed | Shimano XTR M9200 |
| Crankset | not listed | Shimano Dura-Ace R9200 |
| Wheelset | not listed | Vision SC45 |
| Tire | not listed | Pirelli P Zero Race |
| Brake | not listed | Shimano Dura-Ace R9200 |
| Stem | not listed | Colnago YY.01 |
| Saddle | not listed | Prologo Scratch M5 |
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