Author Impulse ASL

Name: Author Impulse ASL
Brand: Author

2026 MountainCross-country Manufacturer page

Fork travel: 100 mm
Wheels: 29″
Drivetrain: 2 × 9 22–36t / 11–36t
Gear range: 536%
Frame: Aluminum
Brakes: Hydraulic disc

Rider height by size (cm)

Size guide

29"/16" 155–168
29"/18" 166–182

Components

13 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

alloy 29" (ASL) Not identified

Suspension

1 part

Fork
- SR Suntour XCM32

Drivetrain

5 parts

Cassette
- Shimano CS-LG300-9 9 speeds
CS-LG300
Chain
- KMC XGlide 11 speeds
Crankset
- Shimano Cues
Rear derailleur
- Shimano Cues RD-U3020 9 speeds
RD-U3020
Shifters
- Shimano Cues SL-U4000
SL-U4000

Brakes

1 part

Brakes
- Tektro HD-M275 / HD-M276
HD-M275HD-M276

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 1.8 mm Not identified
Tires
- Author

Cockpit and contact points

5 parts

Handlebar
- Author
Pedals

plastic Not identified
Saddle
- Author
Seatpost
- Author
Stem
- Author

Sizes and geometry

2 sizes Open in the geometry plotter

Enter your height to highlight matching ranges.

Size 29"/16"

Table

Reach 400mm

Stack 629mm

Wheelbase 1119mm

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 2 published sizes

Complete manufacturer geometry by size
Measurement
Reachmm	400	418
Stackmm	629	634
Top tube lengthmm	580	600
Seat tube lengthmm	406	457
Head tube lengthmm	115	120
Head tube angle	69°	69°
Seat tube angle	74°	74°
Chainstay lengthmm	450	450
Wheelbasemm	1119	1139
Front centermm	676	696
Bottom bracket dropmm	60	60
Bottom bracket heightmm	314	314
Fork rakemm	51	51
Trailmm	89	89
Stack/reach ratio	1.57	1.52

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

Suspension

Suspension configuration: Hardtail
Front travel: 100 mm

Drivetrain

Derived by Bikelake

Front chainrings: 2
Smallest chainring: 22
Largest chainring: 36
Rear sprockets: 9
Smallest sprocket: 11
Largest sprocket: 36
Lowest gear: 17.7 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: Coil
Tire width: 2.2″
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: 6.8 km/h
Highest gear: 36.4 km/h

Total gear range 536%

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.