2025 Cervélo Áspero RX827 vs 2026 Specialized Crux Comp Shimano
The 49 is the Specialized Crux Comp Shimano size closest to your 51 Cervélo Áspero RX827. 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 Specialized Crux Comp Shimano
Compared with the Cervélo Áspero RX827 in 51, the Specialized Crux Comp Shimano in 49 places the top of the head tube 5 mm higher and about as far forward, relative to the bottom bracket. Its wheelbase is 6 mm longer, which can contribute to stability at speed.
- Frame stack
- +5 mm
- Higher front end
- Frame reach
- −2 mm
- About the same reach
- Wheelbase
- +6 mm
- Longer: steadier at speed
- Head angle
- −0.6°
- Slacker: calmer steering
- Chainstays
- +3 mm
- About the same
The two frames
Cervélo Áspero RX827, 51Specialized Crux Comp Shimano, 49Drawn to scale and lined up at the bottom bracket.
Geometry side by side
| Measurement | Cervélo Áspero RX827 51 | Specialized Crux Comp Shimano 49 | Difference |
|---|---|---|---|
| Reach | 377 | 375 | −2 mm |
| Stack | 525 | 530 | +5 mm |
| Head tube angle | 71.1 | 70.5 | −0.6° |
| Seat tube angle | 73.6 | 75.5 | +1.9° |
| Effective top tube | 531 | 512 | −19 mm |
| Chainstay length | 422.5 | 425 | +3 mm |
| Wheelbase | 1002 | 1008 | +6 mm |
| BB drop | 80 | 74 | −6 mm |
| Standover | 753 | not listed | |
| Head tube length | 99 | 100 | +1 mm |
Differences are the Specialized Crux Comp Shimano minus the Cervélo Áspero RX827. Full charts: 2025 Cervélo Áspero RX827, 2026 Specialized Crux Comp Shimano.
Where each sits in its class
Cervélo Áspero RX827Specialized Crux Comp Shimano
Each bike is ranked against the other gravel 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 | Cervélo Áspero RX827GRX RX827 Di2 | Specialized Crux Comp ShimanoComp Shimano GRX |
|---|---|---|
| Cassette | Shimano GRX | Shimano XT |
| Crankset | Shimano GRX | Shimano GRX RX820 |
| Wheelset | Reserve 40|44TA GR | DT Swiss G540 |
| Handlebar | Cervélo Carbon | Specialized Adventure Gear |
| Seatpost | Cervélo Carbon | Roval Terra Carbon |
| Frame | not listed | Specialized Crux FACT 10r Carbon |
| Fork | not listed | Specialized FACT carbon |
| Shifter | not listed | Shimano GRX RX820 820 |
| Derailleur | not listed | Shimano GRX RX822-GS |
| Chain | not listed | Shimano XT M8100 |
| Chainring | not listed | Shimano GRX RX820 |
| Bottom bracket | not listed | Shimano BB |
| Tire | not listed | Specialized Pathfinder Pro 2BR |
| Brake | not listed | Shimano GRX RX820 |
| Rotor | not listed | Shimano 180mm CenterLock |
| Stem | not listed | Specialized 3D-forged alloy |
| Saddle | not listed | Specialized Body Geometry Power Sport |
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