Dolan GXA Aluminium Disc Shimano 12s 105 R7120

2025 RoadGravel Manufacturer page

Price: Not published

Prices shown first for United States
United Kingdom: £1,399 Last known price
Suspension: Rigid
Wheels: 700c
Drivetrain: 2 × 12 34–50t / 11–34t
Gear range: 455%
Frame: Aluminum
Brakes: Hydraulic disc

Not published by the manufacturer

Sizes and geometry

Components

12 of 19 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

GXA Gravel Frame - (49cm X-SML) Not identified

Suspension

1 part

Fork
- Alpina

Drivetrain

7 parts

Bottom bracket

Tthreaded Not identified
Cassette
- Shimano 105 CS-R7101-12 12 speeds
CS-R7101-12
Chain
- Shimano Deore CN-M6100
CN-M6100
Crankset

105-R7100 12s Chainset - 170mm 50/34T Not identified
Front derailleur
- Shimano 105 FD-R7100 2 speeds
FD-R7100
Power meter

None-Powermeter-Fitted Not identified
Rear derailleur
- Shimano 105 RD-R7100 12 speeds
RD-R7100

Brakes

1 part

Brakes
- Shimano 105
BR-R7120FBR-R7120R

Wheels and tires

2 parts

Cockpit and contact points

5 parts

Other components

2 parts

Fenders

None-Fitted Not identified
Racks

None-Fitted Not identified

Specifications

Frame and fork

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

Suspension

Suspension configuration: Rigid

Drivetrain

Derived by Bikelake

Front chainrings: 2
Smallest chainring: 34
Largest chainring: 50
Rear sprockets: 12
Smallest sprocket: 11
Largest sprocket: 34
Lowest gear: 29.0 in
Highest gear: 131.8 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: BSA
Tire width: 32c
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

29.0 gear inches

This value is above the central range for this class.

Cohort: Road / Gravel Model year: 2025
Sample: 1,536 bicycles with this information
Coverage: 76.6% of the class

Highest gear

131.8 gear inches

This value is above the central range for this class.

Cohort: Road / Gravel Model year: 2025
Sample: 1,536 bicycles with this information
Coverage: 76.6% of the class

Shifting

Mechanical

688 of 1,999 bicycles with this information use electronic shifting.

Cohort: Road / Gravel Model year: 2025
Sample: 1,999 bicycles with this information
Coverage: 99.7% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 11.1 km/h
Highest gear: 50.5 km/h

Total gear range 455%

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: 29.0–131.8 gear inches
Class reference (p10–p90): 22.8–126.6 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Road / Gravel Model year: 2025
Lowest gear: 1536 bicycles with this information, 76.6% of the class
Highest gear: 1536 bicycles with this information, 76.6% 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 2025 builds
Specification	This bicycle Dolan GXA Aluminium Disc Shimano 12s 105 R7120	Dolan GXA Aluminium Disc Shimano 12s 105 R7170 Di2	Dolan GXA Aluminium Disc Shimano GRX RX610 1x12 2x12	Dolan GXA Aluminium Disc Shimano GRX RX820 1x12 2x12	Dolan GXA Aluminium Disc Shimano GRX RX825 Di2 2x12
Drivetrain
Front chainrings	2	2	1	1	2
Smallest chainring	34	34	40	40	31
Largest chainring	50	50	40	40	48
Largest sprocket	34	34	34	30	30
Lowest gear	29.0 in	29.0 in	34.1 in	38.7 in	30.0 in
Highest gear	131.8 in	131.8 in	105.5 in	105.5 in	126.6 in
Cockpit
Shifting	Mechanical	Electronic	Mechanical	Mechanical	Electronic