2026 Colnago G4-X Shimano vs 2026 Specialized Crux Comp Shimano
The 56 is the Specialized Crux Comp Shimano size closest to your 520 Colnago G4-X 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 Specialized Crux Comp Shimano
Compared with the Colnago G4-X Shimano in 520, the Specialized Crux Comp Shimano in 56 places the top of the head tube 5 mm higher and 7 mm further forward, relative to the bottom bracket.
- Frame stack
- +5 mm
- Higher front end
- Frame reach
- +7 mm
- Longer frame reach
- Wheelbase
- n/a
- One of the bikes has no number for this
- Head angle
- +0.5°
- Steeper: sharper steering
- Chainstays
- −5 mm
- Shorter: livelier
The two frames
We can't draw these frames yet. The Colnago G4-X Shimano numbers we have for size 520 are missing the wheelbase. The numbers below still compare.
Geometry side by side
| Measurement | Colnago G4-X Shimano 520 | Specialized Crux Comp Shimano 56 | Difference |
|---|---|---|---|
| Reach | 390 | 397 | +7 mm |
| Stack | 573 | 578 | +5 mm |
| Head tube angle | 71.5 | 72 | +0.5° |
| Seat tube angle | 73.5 | 73.5 | ±0.0° |
| Effective top tube | 560 | 568 | +8 mm |
| Chainstay length | 430 | 425 | −5 mm |
| BB drop | 70 | 72 | +2 mm |
| Fork length | 406 | not listed | |
| Wheelbase | not listed | 1033 | |
| Head tube length | not listed | 147 |
Differences are the Specialized Crux Comp Shimano minus the Colnago G4-X Shimano. Full charts: 2026 Colnago G4-X Shimano, 2026 Specialized Crux Comp Shimano.
Where each sits in its class
Colnago G4-X ShimanoSpecialized 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 | Colnago G4-X ShimanoShimano GRX Di2 825 2x | Specialized Crux Comp ShimanoComp Shimano GRX |
|---|---|---|
| Frame | Colnago G4-X | Specialized Crux FACT 10r Carbon |
| Fork | Colnago G4-X Carbon | Specialized FACT carbon |
| Cassette | Shimano GRX | Shimano XT |
| Crankset | Shimano GRX RX620 | Shimano GRX RX820 |
| Chainring | Shimano GRX | Shimano GRX RX820 |
| Bottom bracket | Shimano GRX | Shimano BB |
| Wheelset | Fulcrum Lite ER | DT Swiss G540 |
| Brake | Shimano GRX RX820 | Shimano GRX RX820 |
| Rotor | Shimano GRX RX820 | Shimano 180mm CenterLock |
| Headset | Acros Sealed Bearings | not listed |
| Seatpost | Colnago Carbon D-Shape | Roval Terra Carbon |
| Saddle | Selle Italia Novus Boost Evo Superflow | Specialized Body Geometry Power Sport |
| Shifter | not listed | Shimano GRX RX820 820 |
| Derailleur | not listed | Shimano GRX RX822-GS |
| Chain | not listed | Shimano XT M8100 |
| Tire | not listed | Specialized Pathfinder Pro 2BR |
| Handlebar | not listed | Specialized Adventure Gear |
| Stem | not listed | Specialized 3D-forged alloy |
Know what is on every bike.
Add your bike to Quiver. Keep its parts, setup, and service history together, then share your build.
Explore the app
