Colnago C68 Gravel Shimano GRX 1x

Name: Colnago C68 Gravel Shimano GRX 1x
Brand: Colnago

2026 RoadRace Manufacturer page

Suspension: Rigid
Wheels: 700c
Drivetrain: 1 × 12 42t / 10–51t
Gear range: 510%
Brakes: Hydraulic disc

Sizes

Size guide

45cm
48cm
51cm
54cm
57cm

The manufacturer did not publish rider heights for these sizes.

Components

12 of 18 identified

Parts found in a manufacturer catalog show their brand, model and key numbers, and the steps show how precisely they are identified: brand, series, model, or the exact product. The info button has every detail and the text the manufacturer published.

Drivetrain

7 parts

Bottom bracket
- Shimano
Cassette
- Shimano
Chain
- Shimano Deore XT CN-M8100
CN-M8100
Crankset
- Shimano GRX 42t
Front derailleur

This groupset has a single chainring. This groupset has a single chainring. Not identified
Rear derailleur
- Shimano GRX RD-RX822-SGS 12 speeds
RD-RX822-SGS
Shifters
- Shimano GRX

Brakes

2 parts

Brake levers
- Shimano GRX ST-RX820
ST-RX820
Brakes
- Shimano
RX-820RT-MT800

Wheels and tires

4 parts

Front hub

Aluminium, Sealed Cartridge Bearings, Aluminium, Sealed Cartridge Bearings Not identified
Rear hub

Aluminium, Sealed Cartridge Bearings, Aluminium, Sealed Cartridge Bearings Not identified
Rims

Front: 24.1 mm; Rear: 24.1 mm, Front: 24.1 mm; Rear: 24.1 mm Not identified
Tires
- Pirelli

Cockpit and contact points

5 parts

Handlebar
- Colnago
Headset
- Acros
Saddle
- Selle Italia NOVUS
Seatpost

Carbon seatpost, 0.15 offset, "D-Shape" section, Carbon seatpost, 0.15 offset, "D-Shape" section Not identified
Stem

CC01 integrated cockpit, CC01 integrated cockpit Not identified

Sizes and geometry

5 sizes Open in the geometry plotter

Complete rider-height ranges are not published for these sizes. You can still explore the geometry below.

Size 51cm

Table

Geometry diagram unavailable

The drawing needs wheelbase and seat tube length, which the manufacturer did not publish. Available facts remain in the table.

Size Reach Stack

Complete manufacturer geometry table 5 published sizes

Complete manufacturer geometry by size
Measurement
Frame
Reachmm	375	386	397	408	419
Stackmm	541	555	580	605	630
Top tube lengthmm	520	545	569	590	600
Head tube lengthmm	130	130	157	185	212
Head tube angle	75°	70.5°	70.5°	70.5°	70.5°
Seat tube angle	75°	74°	73.5°	73.2°	73°
Chainstay lengthmm	425	425	425	425	425
Bottom bracket dropmm	72	74	72	72	72
Bottom bracket heightmm	264	262	264	264	264
Stack/reach ratio	1.44	1.44	1.46	1.48	1.50
Suspension and parts
Crank lengthmm	170	170	172.5	172.5	175
Handlebar widthmm	460	460	460	460	460
Stem lengthmm	80	90	100	110	120

Not published by the manufacturer: Seat tube length, Wheelbase, Front center, Standover height, Fork rake, Trail, Front travel, Rear travel, Stem angle, Seatpost length and Dropper post travel.

Specifications

Frame and fork

Intended fit: Unisex
Fork material: Carbon
Weight limit: 120 kg

264.6 lb

Suspension

Suspension configuration: Rigid

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 42
Largest chainring: 42
Rear sprockets: 12
Smallest sprocket: 10
Largest sprocket: 51
Lowest gear: 23.9 in
Highest gear: 121.8 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Hydraulic disc

Fit and controls

Seatpost: Rigid seatpost
Shifting: Mechanical

Additional specifications

Bottom bracket standard: T47
Tire width: 40c
Wheel material: Aluminum
Wheel size: 700c

Technical analysis

3 measures

How these figures sit among bicycles of the same class and model year. Context, not a ranking.

Lowest gear

23.9 gear inches

This value is below the central range for this class.

Cohort: Road / Race Model year: 2026
Sample: 719 bicycles with this information
Coverage: 78.6% of the class

Highest gear

121.8 gear inches

This value is below the central range for this class.

Cohort: Road / Race Model year: 2026
Sample: 719 bicycles with this information
Coverage: 78.6% of the class

Shifting

Mechanical

631 of 912 bicycles with this information use electronic shifting.

Cohort: Road / Race Model year: 2026
Sample: 912 bicycles with this information
Coverage: 99.7% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 9.1 km/h
Highest gear: 46.7 km/h

Total gear range 510%

Technical details and class reference

These speeds describe the gearing at the selected cadence, not how fast you can ride.
Calculated from published gear-inch values and their wheel-size assumptions.
These gearing values describe the bicycle, not a selected frame size.
A 100% range means one ratio; 500% means the highest ratio is five times the lowest.
For e-bikes, motor assistance cutoff is not represented.

Gear-inch range

Lower gear-inch values travel less distance per pedal revolution; higher values travel farther.

This bicycle: 23.9–121.8 gear inches
Class reference (p10–p90): 27.4–139.2 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Road / Race Model year: 2026
Lowest gear: 719 bicycles with this information, 78.6% of the class
Highest gear: 719 bicycles with this information, 78.6% of the class

Lineup changes

The published facts that differ across this family's builds and from the same model a year earlier. Missing information never counts as zero.

Differences across 2026 builds
Specification	This bicycle Colnago C68 Gravel Shimano GRX 1x	Colnago C68 Allroad WRL Campagnolo Super Record	Colnago C68 Allroad Shimano Dura-Ace Di2	Colnago C68 Allroad Shimano Ultegra Di2	Colnago C68 Allroad SRAM Force eTap AXS	Colnago C68 Allroad SRAM Red eTap AXS
Drivetrain
Front chainrings	1	2	2	2	2	2
Smallest chainring	42	32	36	36	35	35
Largest chainring	42	48	52	52	48	48
Smallest sprocket	10	10	11	11	10	10
Largest sprocket	51	27	30	30	28	28
Lowest gear	23.9 in	34.4 in	34.8 in	34.8 in	36.3 in	36.3 in
Highest gear	121.8 in	139.2 in	137.1 in	137.1 in	139.2 in	139.2 in
Brakes
Brake type	Hydraulic disc	Mechanical disc	Hydraulic disc	Hydraulic disc	Hydraulic disc	Hydraulic disc
Cockpit
Shifting	Mechanical	Electronic	Electronic	Electronic	Electronic	Electronic
Other specifications
Tire width	40c	32c	32c	32c	32c	32c
Wheel material	Aluminum	Aluminum	Carbon	Carbon	Carbon	Carbon