Author Classic

2018 UrbanCommuter Manufacturer page

Fork travel: 60 mm
Wheels: 700c
Drivetrain: 3 × 9 28–48t / 11–34t
Gear range: 530%
Weight: 13.8 kg 30.4 lb · Reference configuration not specified
Frame: Aluminum
Brakes: Rim brake

Rider height by size (cm)

Size guide

16" 150–167
18" 164–177
20" 174–187
22" 184–200

Components

15 of 20 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

alloy 6061 700c Not identified

Suspension

1 part

Fork
- RST

Drivetrain

6 parts

Cassette
- Shimano CS-HG200-9 9 speeds
CS-HG200
Chain
- KMC
Crankset
- SR Suntour
Front derailleur
- Shimano Altus
Rear derailleur
- Shimano Altus
Shifters
- Shimano Altus

Brakes

1 part

Brakes
- Tektro

Wheels and tires

5 parts

Front hub

QUANDO 32 holes Not identified
Rear hub

QUANDO 32 holes Not identified
Rims
- Author
Spokes

black steel Not identified
Tires
- Author

Cockpit and contact points

6 parts

Grips
- Author
Handlebar

steel 20 mm 660mm Not identified
Pedals
- Author
Saddle
- Author
Seatpost
- Author
Stem
- Zoom

Sizes and geometry

4 sizes Open in the geometry plotter

Enter your height to highlight matching ranges.

Size 18"

Table

Reach 433mm

Stack 602mm

Wheelbase 1064mm

Head angle 71.0°

Seat angle 73.0°

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 4 published sizes

Complete manufacturer geometry by size
Measurement
Frame
Reachmm	418	433	459	418
Stackmm	593	602	611	583
Top tube lengthmm	560	580	600	620
Seat tube lengthmm	406	457	508	559
Head tube lengthmm	130	150	170	180
Head tube angle	71°	71°	71°	71.5°
Seat tube angle	73°	73°	73°	73°
Chainstay lengthmm	440	440	440	440
Wheelbasemm	1044	1064	1085	1105
Front centermm	611	631	652	672
Bottom bracket dropmm	60	60	60	60
Fork rakemm	42	42	42	42
Trailmm	114	112	120	41
Stack/reach ratio	1.42	1.39	1.33	1.40
Suspension and parts
Crank lengthmm	170	175	175	170
Handlebar widthmm	700	700	700	710
Stem lengthmm	90	100	110	70

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

Specifications

Frame and fork

Intended fit: Unisex
Frame material: Aluminum
Bicycle weight: 13.8 kg

30.4 lb

Suspension

Suspension configuration: Hardtail
Front travel: 60 mm

Drivetrain

Derived by Bikelake

Front chainrings: 3
Smallest chainring: 28
Largest chainring: 48
Rear sprockets: 9
Smallest sprocket: 11
Largest sprocket: 34
Lowest gear: 23.9 in
Highest gear: 126.6 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Rim brake

Fit and controls

Seatpost: Rigid seatpost
Shifting: Mechanical

Additional specifications

Tire width: 42c
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 within the central range for this class.

Cohort: Urban / Commuter Model year: 2018
Sample: 142 bicycles with this information
Coverage: 75.5% of the class

Highest gear

126.6 gear inches

This value is within the central range for this class.

Cohort: Urban / Commuter Model year: 2018
Sample: 142 bicycles with this information
Coverage: 75.5% of the class

Shifting

Mechanical

4 of 188 bicycles with this information use electronic shifting.

Cohort: Urban / Commuter Model year: 2018
Sample: 188 bicycles with this information
Coverage: 100.0% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 9.1 km/h
Highest gear: 48.5 km/h

Total gear range 530%

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: 23.9–126.6 gear inches
Class reference (p10–p90): 17.7–126.6 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Urban / Commuter Model year: 2018
Lowest gear: 142 bicycles with this information, 75.5% of the class
Highest gear: 142 bicycles with this information, 75.5% of the class