Cannondale Topstone Carbon 2 GRX 2x

Name: Cannondale Topstone Carbon 2 GRX 2x
Brand: Cannondale

2026 RoadGravel Manufacturer page

Cannondale Topstone Carbon 2 GRX 2x, color Obsidian

Last known price: $4,399

Prices shown first for United States
Suspension: Rigid
Wheels: 700c
Drivetrain: 2 × 12 31–48t / 11–34t
Gear range: 479%
Frame: Carbon
Brakes: Hydraulic disc

Rider height by size (cm)

Size guide

51cm 165.1–175.3
54cm 172.7–180.3
56cm 177.8–185.4
58cm 182.9–193
61cm 190.5–200.7
47cm Not informed

Components

19 of 23 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.

Frame and fork

1 part

Frame

Topstone Carbon, Kingpin suspension system, Proportional Response construction, downtube Stashport, internal cable routing, 12x142mm thru-axle, 27.2 dropper post ready, UDH, BSA 68mm threaded BB, flat mount disc, removable fender bridge, multiple gear/bottle mounts Not identified

Suspension

1 part

Fork

Topstone Carbon, 1-1/8" to 1.5" steerer, 55mm OutFront offset, flat mount disc, internal routing, 12x100 thru-axle, triple bottle/gear mounts, fender mounts Not identified

Drivetrain

7 parts

Bottom bracket
- Shimano
Cassette
- Shimano Ultegra CS-R8100-12
CS-R8100-12
Chain
- Shimano Deore XT CN-M8100
CN-M8100
Crankset
- Shimano GRX FC-RX820 12 speeds 48/31t
FC-RX820
Front derailleur
- Shimano GRX FD-RX820 2 speeds
FD-RX820
Rear derailleur
- Shimano GRX
Shifters
- Shimano GRX

Brakes

2 parts

Wheels and tires

5 parts

Front hub
- Shimano HB-TC500
HB-TC500
Rear hub
- Shimano FH-TC500
FH-TC500
Rims
- WTB
Spokes

Stainless Steel, 14g Not identified
Tires
- WTB Riddler

Cockpit and contact points

7 parts

Sizes and geometry

6 sizes Open in the geometry plotter

Enter your height to highlight matching ranges.

Size 56cm

Table

Reach 383mm

Stack 597mm

Wheelbase 1036mm

Head angle 70.7°

Seat angle 73.1°

Every size is drawn to the same scale, in millimeters. Explanatory schematic on an assumed 700c wheel; exact published values are in the table below.

Size Reported by the manufacturer

Complete manufacturer geometry table 6 published sizes

Complete manufacturer geometry by size
Measurement
Reachmm	373	378	383	389	397	364
Stackmm	561	579	597	615	646	554
Top tube lengthmm	543	554	564	576	593	532
Seat tube lengthmm	446	482	518	554	590	410
Head tube lengthmm	101	123	142	164	196	97
Head tube angle	70.7°	70.7°	70.7°	70.7°	70.7°	69.9°
Seat tube angle	73.1°	73.1°	73.1°	73.1°	73.1°	73.1°
Chainstay lengthmm	420	420	420	420	420	420
Wheelbasemm	1012	1026	1036	1050	1069	1009
Front centermm	605	617	628	641	659	601
Bottom bracket dropmm	79	76	76	74	74	79
Bottom bracket heightmm	280	283	283	285	285	280
Standover heightmm	741	772	800	831	864	716
Fork rakemm	55	55	55	55	55	55
Trailmm	67	67	67	67	67	73

Not published by the manufacturer: Stack/reach ratio, Front travel, Rear travel, Crank length, Handlebar width, Stem length, Stem angle, Seatpost length and Dropper post travel.

Specifications

Frame and fork

Intended fit: Unisex
Frame material: Carbon
Fork material: Carbon

Suspension

Suspension configuration: Rigid

Drivetrain

Derived by Bikelake

Front chainrings: 2
Smallest chainring: 31
Largest chainring: 48
Rear sprockets: 12
Smallest sprocket: 11
Largest sprocket: 34
Lowest gear: 26.4 in
Highest gear: 126.6 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Hydraulic disc

Fit and controls

Derailleur hanger: UDH
Seatpost: Rigid seatpost
Shifting: Mechanical

Additional specifications

Bottom bracket standard: BSA
Tire width: 45c
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

26.4 gear inches

This value is within the central range for this class.

Cohort: Road / Gravel Model year: 2026
Sample: 1,455 bicycles with this information
Coverage: 73.2% of the class

Highest gear

126.6 gear inches

This value is above the central range for this class.

Cohort: Road / Gravel Model year: 2026
Sample: 1,455 bicycles with this information
Coverage: 73.2% of the class

Shifting

Mechanical

706 of 1,980 bicycles with this information use electronic shifting.

Cohort: Road / Gravel Model year: 2026
Sample: 1,980 bicycles with this information
Coverage: 99.6% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 10.1 km/h
Highest gear: 48.5 km/h

Total gear range 479%

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: 26.4–126.6 gear inches
Class reference (p10–p90): 22.8–127.6 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Road / Gravel Model year: 2026
Lowest gear: 1455 bicycles with this information, 73.2% of the class
Highest gear: 1455 bicycles with this information, 73.2% 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 Cannondale Topstone Carbon 2 GRX 2x	Cannondale Topstone 1	Cannondale Topstone 2	Cannondale Topstone 2 Cues 1x	Cannondale Topstone 2 GRX 2x	Cannondale Topstone 3
Frame
Frame material	Carbon	Aluminum	Aluminum	Aluminum	Aluminum	Aluminum
Drivetrain
Front chainrings	2	2	2	1	2	1
Smallest chainring	31	30	30	40	30	40
Largest chainring	48	46	46	40	46	40
Rear sprockets	12	12	10	11	10	10
Largest sprocket	34	34	34	50	32	48
Lowest gear	26.4 in	25.6 in	25.6 in	23.2 in	27.2 in	24.2 in
Highest gear	126.6 in	121.3 in	121.3 in	105.5 in	121.3 in	105.5 in
Brakes
Brake type	Hydraulic disc	Hydraulic disc	Hydraulic disc	Hydraulic disc	Hydraulic disc	Mechanical disc
Cockpit
Derailleur hanger	UDH	Not informed	Not informed	Not informed	Not informed	Not informed
Other specifications
Tire width	45c	37c	37c	37c	37c	37c
Tire clearance	Not informed	Maximum tire width: 45c	Maximum tire width: 45c	Maximum tire width: 45c	Not informed	Not informed