2026 Specialized Tarmac SL8 Comp Shimano vs 2025 Colnago Y1Rs
The S is the Colnago Y1Rs size closest to your 52 Specialized Tarmac SL8 Comp 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 Colnago Y1Rs
Compared with the Specialized Tarmac SL8 Comp Shimano in 52, the Colnago Y1Rs in S places the top of the head tube 7 mm lower and 3 mm further back, relative to the bottom bracket.
- Frame stack
- −7 mm
- Lower front end
- Frame reach
- −3 mm
- Shorter frame reach
- Wheelbase
- n/a
- One of the bikes has no number for this
- Head angle
- −0.6°
- Slacker: calmer steering
- Chainstays
- −2 mm
- About the same
The two frames
Only the Specialized Tarmac SL8 Comp Shimano is drawn. The Colnago Y1Rs numbers we have for size S are missing the wheelbase.
Geometry side by side
| Measurement | Specialized Tarmac SL8 Comp Shimano 52 | Colnago Y1Rs S | Difference |
|---|---|---|---|
| Reach | 380mm | 377 | −3 mm |
| Stack | 527mm | 520 | −7 mm |
| Head tube angle | 72.5° | 71.9 | −0.6° |
| Seat tube angle | 74° | 74.5 | +0.5° |
| Effective top tube | 531mm | not listed | |
| Chainstay length | 410mm | 408 | −2 mm |
| Wheelbase | 975mm | not listed | |
| BB drop | 74mm | 74 | ±0 mm |
| BB height | 266mm | not listed | |
| Standover | 746mm | not listed | |
| Seat tube length | 456mm | not listed | |
| Fork length | 370mm | 376.5 | +7 mm |
| Head tube length | 120mm | 108.5 | −12 mm |
Differences are the Colnago Y1Rs minus the Specialized Tarmac SL8 Comp Shimano. Full charts: 2026 Specialized Tarmac SL8 Comp Shimano, 2025 Colnago Y1Rs.
Where each sits in its class
Specialized Tarmac SL8 Comp ShimanoColnago 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 Comp ShimanoComp - Shimano 105 Di2 | Colnago Y1RsY1RS |
|---|---|---|
| Frame | Specialized Tarmac SL8 FACT | Colnago Y1Rs |
| Shifter | Shimano 105 R7170 Di2 | Shimano Dura-Ace R9200 |
| Derailleur | Shimano 105 R7170 | Shimano Dura-Ace R9200 Di2 |
| Cassette | Shimano 105 R7100 | not listed |
| Chain | Shimano SLX M7100 | Shimano XTR M9200 |
| Crankset | Shimano 105 R7100 | Shimano Dura-Ace R9200 |
| Wheelset | DT Swiss R470 | Vision SC45 |
| Tire | Specialized S-Works Turbo | Pirelli P Zero Race |
| Brake | Shimano 105 | Shimano Dura-Ace R9200 |
| Headset | Specialized SL7 | not listed |
| Seatpost | Specialized S-Works Tarmac SL8 | not listed |
| Saddle | Specialized Power Sport | Prologo Scratch M5 |
| Stem | not listed | Colnago YY.01 |
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