Viathon G.1 105

Name: Viathon G.1 105
Brand: Viathon

2020 RoadGravel Manufacturer page

Last known price: $2,300

Prices shown first for United States
Suspension: Rigid
Wheels: 700c
Drivetrain: 2 × 11 34–50t / 11–32t
Gear range: 428%
Frame: Carbon
Brakes: Hydraulic disc

Rider height by size (cm)

Size guide

52cm 158–170
54cm 168–177
56cm 175–185
58cm 183–190
60cm 188–198

Components

16 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

VIATHON G.1 GRAVEL CARBON FRAME Not identified

Suspension

1 part

Fork

VIATHON G.1 GRAVEL CARBON FORK Not identified

Drivetrain

7 parts

Bottom bracket
- Shimano SM-BBR60
SM-BBR60
Cassette
- Shimano 105 CS-R7000 11 speeds 11–32t
CS-R7000
Chain
- Shimano CN-HG601-11
CN-HG601-11
Crankset
- Shimano 105 FC-R7000 11 speeds 34t
FC-R7000
Front derailleur
- Shimano 105 FD-R7000 2 speeds
FD-R7000
Rear derailleur
- Shimano 105 RD-R7000-GS 11 speeds
RD-R7000-GS
Shifters
- Shimano 105 ST-R7020
ST-R7020

Brakes

3 parts

Brake levers
- Shimano 105 ST-R7020
ST-R7020
Brakes

SHIMANO105 DISC ST-R7020 Not identified

ST-R7020
Disc rotors
- Shimano SM-RT70
SM-RT70

Wheels and tires

2 parts

Cockpit and contact points

5 parts

Sizes and geometry

5 sizes Open in the geometry plotter

Enter your height to highlight matching ranges.

Size 56cm

Table

Reach 388mm

Stack 582mm

Wheelbase 1024mm

Head angle 72.0°

Seat angle 73.5°

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 5 published sizes

Complete manufacturer geometry by size
Measurement
Reachmm	378.9	382.8	387.6	392.1	408
Stackmm	545	565.8	582	598.2	612.5
Top tube lengthmm	530	545	560	575	595
Seat tube lengthmm	520	540	560	580	600
Head tube lengthmm	125	145	160	175	190
Head tube angle	71°	71.5°	72°	72.5°	72.5°
Seat tube angle	74.5°	74°	73.5°	73°	73°
Chainstay lengthmm	425	425	425	425	425
Wheelbasemm	1013	1019	1024	1029	1049
Front centermm	598	604	609	613	634
Bottom bracket dropmm	69	69	69	69	69
Bottom bracket heightmm	280	280	280	280	280
Fork rakemm	48	48	48	48	48
Trailmm	68.4	65.2	61.9	58.8	58.8
Stack/reach ratio	1.44	1.48	1.50	1.53	1.50

Not published by the manufacturer: Standover height, 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: 34
Largest chainring: 50
Rear sprockets: 11
Smallest sprocket: 11
Largest sprocket: 32
Lowest gear: 30.8 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
Wheel material: Carbon
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

30.8 gear inches

This value is above the central range for this class.

Cohort: Road / Gravel Model year: 2020
Sample: 640 bicycles with this information
Coverage: 82.6% of the class

Highest gear

131.8 gear inches

This value is above the central range for this class.

Cohort: Road / Gravel Model year: 2020
Sample: 640 bicycles with this information
Coverage: 82.6% of the class

Shifting

Mechanical

123 of 774 bicycles with this information use electronic shifting.

Cohort: Road / Gravel Model year: 2020
Sample: 774 bicycles with this information
Coverage: 100.0% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 11.8 km/h
Highest gear: 50.5 km/h

Total gear range 428%

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: 30.8–131.8 gear inches
Class reference (p10–p90): 24.3–131.8 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Road / Gravel Model year: 2020
Lowest gear: 640 bicycles with this information, 82.6% of the class
Highest gear: 640 bicycles with this information, 82.6% 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 2020 builds

Differences across 2020 builds
Specification	This bicycle Viathon G.1 105	Viathon G.1 Force	Viathon G.1 GRX 600	Viathon G.1 GRX 800	Viathon G.1 Red eTap AXS	Viathon G.1 Rival
Drivetrain
Front chainrings	2	1	2	1	1	1
Smallest chainring	34	42	30	42	42	42
Largest chainring	50	42	46	42	42	42
Rear sprockets	11	11	11	11	12	11
Smallest sprocket	11	10	11	11	10	10
Largest sprocket	32	42	34	42	33	42
Lowest gear	30.8 in	29.0 in	25.6 in	29.0 in	36.9 in	29.0 in
Highest gear	131.8 in	121.8 in	121.3 in	110.7 in	121.8 in	121.8 in
Cockpit
Shifting	Mechanical	Mechanical	Mechanical	Mechanical	Electronic	Mechanical
Other specifications
Bottom bracket standard	BSA	Not informed	BSA	BSA	Not informed	Not informed
Wheel material	Carbon	Aluminum	Aluminum	Aluminum	Carbon	Aluminum
Tire width	Not informed	40c	40c	40c	40c	40c