Author Spirit

Name: Author Spirit
Brand: Author

2026 MountainCross-country Manufacturer page

Fork travel: 100 mm
Wheels: 29″
Gear range: 580%
Weight: 14.4 kg 31.7 lb · Reference configuration not specified
Frame: Aluminum
Brakes: Hydraulic disc

Rider height by size (cm)

Size guide

29"/17" 168–180
29"/19" 177–190
29"/21" 187–202

Components

15 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

hydroformed alloy 29" Not identified

Suspension

1 part

Fork
- RST

Drivetrain

6 parts

Cassette
- Shimano CS-LG400-10 10 speeds
CS-LG400-10
Chain
- KMC XGlide 11 speeds
Crankset
- Shimano Cues
Front derailleur
- Shimano Cues FD-U6000 2 speeds
FD-U6000
Rear derailleur
- Shimano Cues RD-U6020
RD-U6020
Shifters
- Shimano Cues SL-U6000
SL-U6000

Brakes

1 part

Brakes
- Tektro HD-M280 / HD-M281
HD-M280HD-M281

Wheels and tires

5 parts

Front hub

QUANDO Disc, 32 holes Not identified
Rear hub

QUANDO Disc, 32 holes Not identified
Rims
- Author
Spokes

black stainless steel 2.0 mm Not identified
Tires
- Vittoria

Cockpit and contact points

5 parts

Sizes and geometry

3 sizes Open in the geometry plotter

Enter your height to highlight matching ranges.

Size 29"/19"

Table

Reach 444mm

Stack 630mm

Wheelbase 1161mm

Head angle 69.0°

Seat angle 74.0°

Every size is drawn to the same scale, in millimeters. Explanatory schematic on an assumed 29″ wheel; exact published values are in the table below.

Size Reported by the manufacturer

Complete manufacturer geometry table 3 published sizes

Complete manufacturer geometry by size
Measurement
Reachmm	423	444	460
Stackmm	616	630	644
Top tube lengthmm	600	625	645
Seat tube lengthmm	432	483	535
Head tube lengthmm	100	115	130
Head tube angle	69°	69°	69°
Seat tube angle	74°	74°	74°
Chainstay lengthmm	450	450	450
Wheelbasemm	1135	1161	1183
Front centermm	693	719	741
Bottom bracket dropmm	65	65	65
Bottom bracket heightmm	309	309	309
Fork rakemm	51	51	51
Trailmm	88	89	88
Stack/reach ratio	1.46	1.42	1.40

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: Aluminum
Bicycle weight: 14.4 kg

31.7 lb

Suspension

Suspension configuration: Hardtail
Front travel: 100 mm

Drivetrain

Derived by Bikelake

Front chainrings: 2
Smallest chainring: 22
Largest chainring: 36
Smallest sprocket: 11
Largest sprocket: 39
Lowest gear: 16.4 in
Highest gear: 94.9 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Hydraulic disc

Fit and controls

Seatpost: Rigid seatpost
Shifting: Mechanical

Additional specifications

Fork spring: Air
Tire width: 2.25″
Wheel material: Aluminum
Wheel size: 29″

Technical analysis

2 measures

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

Front travel

100 mm

This value is within the central range for this class.

Cohort: Mountain / Cross-country Model year: 2026
Sample: 1,209 bicycles with this information
Coverage: 90.0% of the class

Shifting

Mechanical

156 of 1,318 bicycles with this information use electronic shifting.

Cohort: Mountain / Cross-country Model year: 2026
Sample: 1,318 bicycles with this information
Coverage: 98.2% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 6.3 km/h
Highest gear: 36.4 km/h

Total gear range 580%

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: 16.4–94.9 gear inches

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 2026 builds
Specification	This bicycle Author Spirit	Author Spirit ASL
Frame
Bicycle weight	14.4 kg	13.8 kg
Drivetrain
Front chainrings	2	1
Smallest chainring	22	32
Largest chainring	36	32
Largest sprocket	39	50
Lowest gear	16.4 in	18.6 in
Highest gear	94.9 in	84.4 in

Changes since 2025
Specification	2025 Author Spirit	This bicycle Author Spirit
Frame
Bicycle weight	14.8 kg	14.4 kg
Drivetrain
Front chainrings	1	2
Smallest chainring	34	22
Largest chainring	34	36
Rear sprockets	12	Not informed
Smallest sprocket	10	11
Largest sprocket	51	39
Lowest gear	19.3 in	16.4 in
Highest gear	98.6 in	94.9 in
Other specifications
Fork spring	Coil	Air
Tire width	2.1″	2.25″