Author Seance

2017 UrbanCommuter Manufacturer page

Fork travel: 50 mm
Wheels: 700c
Gear range: 309%
Weight: 15.6 kg 34.4 lb · Reference configuration not specified
Frame: Aluminum
Brakes: Rim brake

Rider height by size (cm)

Size guide

17" 155–169
19" 167–182

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

alloy 6061 700c (L) Not identified

Suspension

1 part

Fork
- RST

Drivetrain

5 parts

Cassette
- Shimano CS-HG31 8 speeds
CS-HG31HG-31
Chain
- KMC
Crankset
- Prowheel
Rear derailleur
- Shimano Tourney TX RD-TX800 8 speeds
RD-TX800
Shifters
- Shimano

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

alloy 32 holes Not identified
Spokes

stainless steel Not identified
Tires
- CST

Cockpit and contact points

6 parts

Grips
- Author
Handlebar
- Kalloy
Pedals
- Author
Saddle
- Author
Seatpost

UNO suspension (27.2) Not identified
Stem

UNO adjustable Not identified

Sizes and geometry

2 sizes Open in the geometry plotter

Enter your height to highlight matching ranges.

Size 17"

Table

Geometry diagram unavailable

The drawing needs reach and stack, which the manufacturer did not publish. Available facts remain in the table.

Size Reported by the manufacturer

Complete manufacturer geometry table 2 published sizes

Complete manufacturer geometry by size
Measurement
Top tube lengthmm	522	567
Seat tube lengthmm	432	483
Head tube lengthmm	155	155
Head tube angle	69°	69°
Seat tube angle	75°	75°
Chainstay lengthmm	459	459
Wheelbasemm	1077	1122
Front centermm	623	668
Bottom bracket dropmm	50	50
Fork rakemm	44	44

Not published by the manufacturer: Reach, Stack, Bottom bracket height, Standover height, Trail, 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: Aluminum
Bicycle weight: 15.6 kg

34.4 lb

Suspension

Suspension configuration: Hardtail
Front travel: 50 mm

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 34
Largest chainring: 34
Smallest sprocket: 11
Largest sprocket: 34
Lowest gear: 29.0 in
Highest gear: 89.6 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Rim brake

Fit and controls

Seatpost: suspension
Shifting: Mechanical

Additional specifications

Tire width: 40c
Wheel material: Aluminum
Wheel size: 700c

Technical analysis

2 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 within the central range for this class.

Cohort: Urban / Commuter Model year: 2017
Sample: 112 bicycles with this information
Coverage: 74.1% of the class

Highest gear

89.6 gear inches

This value is below the central range for this class.

Cohort: Urban / Commuter Model year: 2017
Sample: 112 bicycles with this information
Coverage: 74.1% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 11.1 km/h
Highest gear: 34.3 km/h

Total gear range 309%

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: 29.0–89.6 gear inches
Class reference (p10–p90): 16.3–126.6 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Urban / Commuter Model year: 2017
Lowest gear: 112 bicycles with this information, 74.1% of the class
Highest gear: 112 bicycles with this information, 74.1% 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.

Changes since 2016

Changes since 2016
Specification	2016 Author Seance	This bicycle Author Seance
Frame
Bicycle weight	16.1 kg	15.6 kg
Drivetrain
Front chainrings	3	1
Smallest chainring	24	34
Largest chainring	42	34
Smallest sprocket	14	11
Largest sprocket	28	34
Lowest gear	24.9 in	29.0 in
Highest gear	87.0 in	89.6 in