Author Ultima 24

2017 YouthRoad youth Manufacturer page

Suspension: Rigid
Wheels: 24″
Drivetrain: 1 × 8 32t / 11–34t
Gear range: 309%
Weight: 10.9 kg 24.0 lb · Reference configuration not specified
Frame: Aluminum
Brakes: Rim brake

Rider height by size (cm)

Size guide

12" 125–150

Components

8 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 24" (L) Not identified

Suspension

1 part

Fork

hi-ten Not identified

Drivetrain

5 parts

Cassette
- Shimano CS-HG31-8 8 speeds
CS-HG31
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

steel Not identified
Tires

24" x 1.50" Not identified

Cockpit and contact points

6 parts

Grips
- Author
Handlebar

steel 20 mm 580 mm Not identified
Pedals

resin Not identified
Saddle
- Author
Seatpost

alloy (27.2) Not identified
Stem

alloy Not identified

Sizes and geometry

1 size Open in the geometry plotter

Enter your height to highlight matching ranges.

Size 12"

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 1 published size

Complete manufacturer geometry by size
Measurement
Top tube lengthmm	492
Seat tube lengthmm	318
Head tube lengthmm	100
Head tube angle	70°
Seat tube angle	73.5°
Chainstay lengthmm	395
Wheelbasemm	956
Front centermm	562
Bottom bracket dropmm	20
Fork rakemm	45

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
Fork material: Steel
Bicycle weight: 10.9 kg

24.0 lb

Suspension

Suspension configuration: Rigid

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 32
Largest chainring: 32
Rear sprockets: 8
Smallest sprocket: 11
Largest sprocket: 34
Lowest gear: 22.6 in
Highest gear: 69.8 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Rim brake

Fit and controls

Seatpost: Rigid seatpost
Shifting: Mechanical

Additional specifications

Tire width: 1.5″
Wheel material: Aluminum
Wheel size: 24″

Gearing

Estimated speeds at 80 rpm

Lowest gear: 8.7 km/h
Highest gear: 26.7 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: 22.6–69.8 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.

Changes since 2016

Changes since 2016
Specification	2016 Author Ultima 24	This bicycle Author Ultima 24
Frame
Bicycle weight	11.5 kg	10.9 kg
Drivetrain
Front chainrings	3	1
Smallest chainring	24	32
Largest chainring	42	32
Smallest sprocket	14	11
Largest sprocket	28	34
Lowest gear	20.6 in	22.6 in
Highest gear	72.0 in	69.8 in
Rear sprockets	Not informed	8