Vaast A/1 - Gravel 650B

2020 RoadGravel Manufacturer page

Last known price: $2,499

Prices shown first for United States
Suspension: Rigid
Wheels: 650b
Drivetrain: 1 × 11 42t / 11–42t
Gear range: 382%
Frame: Magnesium
Brakes: Hydraulic disc

Rider height by size (cm)

Size guide

SM 160–167.6
MD 170.2–184
LG 181–194
XL 192–203.2

Components

15 of 17 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

Allround-Allroad 700c/650b disc, AE81 ALLITE® Super Mag™, VAAST Allroad geometry, internal cable routing, dropper post ready. Rack and fender ready Not identified

Suspension

1 part

Fork
- Vaast

Drivetrain

6 parts

Bottom bracket
- Praxis
Cassette
- SRAM
Chain
- SRAM
Crankset
- Praxis 42t
Rear derailleur
- SRAM
Shifters
- SRAM

Brakes

2 parts

Wheels and tires

3 parts

Rims
- Stan's NoTubes
Spokes

Double butted stainless Not identified
Tires
- Maxxis Rambler

Cockpit and contact points

4 parts

Sizes and geometry

4 sizes Open in the geometry plotter

Enter your height to highlight matching ranges.

Size MD

Table

Reach 380mm

Stack 563mm

Wheelbase 1023mm

Head angle 71.0°

Seat angle 72.5°

Every size is drawn to the same scale, in millimeters. Explanatory schematic on an assumed 650b wheel; exact published values are in the table below.

Size Reported by the manufacturer

Complete manufacturer geometry table 4 published sizes

Complete manufacturer geometry by size
Measurement
Frame
Reachmm	365	380	395	410
Stackmm	536	563	595	620
Top tube lengthmm	534	557	583	605
Seat tube lengthmm	520	540	560	580
Head tube lengthmm	115	140	170	195
Head tube angle	70°	71°	72°	72°
Seat tube angle	72.5°	72.5°	72.5°	72.5°
Chainstay lengthmm	425	425	425	425
Wheelbasemm	1008	1023	1038	1061
Front centermm	592	607	623	645
Bottom bracket dropmm	68	68	68	68
Standover heightmm	774	797	821	841
Fork rakemm	50	50	50	50
Trailmm	67	61	55	55
Stack/reach ratio	1.47	1.48	1.51	1.51
Suspension and parts
Crank lengthmm	170	172.5	172.5	175
Handlebar widthmm	400	420	420	440
Stem lengthmm	90	90	90	90

Not published by the manufacturer: Bottom bracket height, Front travel, Rear travel, Stem angle, Seatpost length and Dropper post travel.

Specifications

Frame and fork

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

Suspension

Suspension configuration: Rigid

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 42
Largest chainring: 42
Rear sprockets: 11
Smallest sprocket: 11
Largest sprocket: 42
Lowest gear: 27.5 in
Highest gear: 105.0 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
Wheel material: Aluminum
Wheel size: 650b

Technical analysis

3 measures

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

Lowest gear

27.5 gear inches

This value is within 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

105.0 gear inches

This value is below 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: 10.5 km/h
Highest gear: 40.2 km/h

Total gear range 382%

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: 27.5–105.0 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