2023 Cervélo Áspero RX815 vs 2024 Specialized Crux Comp
The 49 is the Specialized Crux Comp size closest to your 51 Cervélo Áspero RX815. 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
Compared with the Cervélo Áspero RX815 in 51, the Specialized Crux Comp in 49 places the top of the head tube at about the same height and 4 mm further back, relative to the bottom bracket. Its wheelbase is 8 mm longer, which can contribute to stability at speed.
- Frame stack
- −2 mm
- About the same height
- Frame reach
- −4 mm
- Shorter frame reach
- Wheelbase
- +8 mm
- Longer: steadier at speed
- Head angle
- −1.0°
- Slacker: calmer steering
- Chainstays
- +5 mm
- Longer: more planted
The two frames
Cervélo Áspero RX815, 51Specialized Crux Comp, 49Drawn to scale and lined up at the bottom bracket.
Geometry side by side
| Measurement | Cervélo Áspero RX815 51 | Specialized Crux Comp 49 | Difference |
|---|---|---|---|
| Reach | 379 | 375 | −4 mm |
| Stack | 530 | 528 | −2 mm |
| Head tube angle | 71.5 | 70.5 | −1.0° |
| Seat tube angle | 74 | 75.5 | +1.5° |
| Effective top tube | 532 | not listed | |
| Chainstay length | 420 | 425 | +5 mm |
| Wheelbase | 1000 | 1008 | +8 mm |
| BB drop | 78.5 | 74 | −5 mm |
| Standover | 732 | 749 | +17 mm |
| Head tube length | 107 | 100 | −7 mm |
| BB height | not listed | 284 | |
| Seat tube length | not listed | 466 | |
| Fork length | not listed | 401mm |
Differences are the Specialized Crux Comp minus the Cervélo Áspero RX815. Full charts: 2023 Cervélo Áspero RX815, 2024 Specialized Crux Comp.
Where each sits in its class
Cervélo Áspero RX815Specialized Crux Comp
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 RX815GRX RX815 Di2 | Specialized Crux CompComp |
|---|---|---|
| Fork | Cervélo Aspero Fork | Specialized FACT carbon |
| Cassette | Shimano HG800 | Shimano XT M8100 |
| Crankset | Shimano GRX RX810 | Shimano GRX RX820 |
| Tire | Panaracer Gravel King SK | Specialized Pathfinder Pro 2BR |
| Headset | FSA IS2 | not listed |
| Frame | not listed | Specialized CruX FACT |
| Shifter | not listed | Shimano GRX RX820 |
| Derailleur | not listed | Shimano GRX RX822-GS |
| Chain | not listed | Shimano XT M8100 |
| Chainring | not listed | Shimano GRX RX820 |
| Bottom bracket | not listed | Shimano GRX RX820 |
| Wheelset | not listed | DT Swiss G540 |
| Brake | not listed | Shimano GRX RX820 |
| Rotor | not listed | Shimano GRX RX820 |
| Handlebar | not listed | Specialized Adventure Gear |
| Stem | not listed | Specialized 3D-forged alloy |
| Seatpost | not listed | Roval Terra |
| Saddle | not listed | Specialized Power Sport |
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