Author Instinct 27.5 ASL

2023 MountainCross-country Manufacturer page

Fork travel: 100 mm
Wheels: 27.5″
Drivetrain: 1 × 11 32t / 11–51t
Gear range: 464%
Weight: 11.9 kg 26.2 lb · Reference configuration not specified
Frame: Aluminum
Brakes: Hydraulic disc

Rider height by size (cm)

Size guide

16" 155–170
18" 168–185

Components

16 of 18 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

double butted hydroformed alloy 6061 27.5" (ASL) Not identified

Suspension

1 part

Fork
- RST

Drivetrain

5 parts

Cassette
- Shimano Deore CS-M5100-11 11 speeds
CS-M5100-11
Chain
- KMC X11 11 speeds
Crankset
- Shimano Deore FC-M5100-1 11 speeds
FC-M5100
Rear derailleur
- Shimano Deore
Shifters
- Shimano Deore SL-M5100
SL-M5100

Brakes

1 part

Brakes
- Shimano BR-MT410
BR-MT410

Wheels and tires

5 parts

Front hub
- Author
Rear hub
- Author
Rims
- Author
Spokes

black stainless steel 2.0 mm Not identified
Tires
- Vittoria

Cockpit and contact points

5 parts

Sizes and geometry

2 sizes Open in the geometry plotter

Enter your height to highlight matching ranges.

Size 16"

Table

Reach 375mm

Stack 606mm

Wheelbase 1064mm

Head angle 69.5°

Seat angle 73.0°

Every size is drawn to the same scale, in millimeters. Explanatory schematic on an assumed 27.5″ wheel; exact published values are in the table below.

Size Reported by the manufacturer

Complete manufacturer geometry table 2 published sizes

Complete manufacturer geometry by size
Measurement
Reachmm	375	397
Stackmm	606	615
Top tube lengthmm	560	585
Seat tube lengthmm	406	457
Head tube lengthmm	120	130
Head tube angle	69.5°	69.5°
Seat tube angle	73°	73°
Chainstay lengthmm	435	435
Wheelbasemm	1064	1090
Front centermm	633	659
Bottom bracket dropmm	45	45
Bottom bracket heightmm	310	310
Fork rakemm	44	44
Trailmm	86	86
Stack/reach ratio	1.62	1.55

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: 11.9 kg

26.2 lb

Suspension

Suspension configuration: Hardtail
Front travel: 100 mm

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 32
Largest chainring: 32
Rear sprockets: 11
Smallest sprocket: 11
Largest sprocket: 51
Lowest gear: 17.3 in
Highest gear: 80.0 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: 27.5″

Technical analysis

4 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: 2023
Sample: 1,907 bicycles with this information
Coverage: 95.2% of the class

Lowest gear

17.3 gear inches

This value is below the central range for this class.

Cohort: Mountain / Cross-country Model year: 2023
Sample: 1,578 bicycles with this information
Coverage: 78.8% of the class

Highest gear

80.0 gear inches

This value is below the central range for this class.

Cohort: Mountain / Cross-country Model year: 2023
Sample: 1,578 bicycles with this information
Coverage: 78.8% of the class

Shifting

Mechanical

223 of 2,002 bicycles with this information use electronic shifting.

Cohort: Mountain / Cross-country Model year: 2023
Sample: 2,002 bicycles with this information
Coverage: 100.0% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 6.6 km/h
Highest gear: 30.6 km/h

Total gear range 464%

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: 17.3–80.0 gear inches
Class reference (p10–p90): 17.7–101.5 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Mountain / Cross-country Model year: 2023
Lowest gear: 1578 bicycles with this information, 78.8% of the class
Highest gear: 1578 bicycles with this information, 78.8% 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 2023 builds
Specification	This bicycle Author Instinct 27.5 ASL	Author Instinct 29	Author Instinct 29 ASL
Frame
Bicycle weight	11.9 kg	12.5 kg	12.3 kg
Drivetrain
Front chainrings	1	2	1
Smallest chainring	32	26	32
Largest chainring	32	36	32
Largest sprocket	51	42	51
Lowest gear	17.3 in	18.0 in	18.2 in
Highest gear	80.0 in	94.9 in	84.4 in
Other specifications
Wheel size	27.5″	29″	29″