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2026 Author

A-Matrix 24D

A 24″ aluminum frame road youth bike with mid-range components and tektro hydraulic disc brakes.
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Weight25.4 lbs  
FrameAluminum
SuspensionHardtail, 50mm
Wheels24″ Aluminum
Drivetrain1 × 8
GroupsetTourney, Acera
BrakesTektro Hydraulic Disc
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Insights
Ride Feel

Based on frame geometry and build specs.

Rider Position
relaxedaggressive
A-Matrix 24D
Other Road Youth bikes
Gearing

A bike with lower gearing will be easier to ride up steep hills, while a higher top end means it will pedal faster down hills.

Lowest gear

(climbing)

21 mph

A-Matrix 24D

Highest gear

(descending)

Sizing
12"

4'1" – 4'8"

Rider Fit Notes

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Geometry
Specs
Build
Frame

alloy 24"

Colors: Titan-Matt / Black / Red; White / Black / Blue; - / Black / Lime

Fork

ZOOM Disc 24 (50 mm)

Travel: 50mm

Stem

alloy

Handlebar

alloy, rise 20 mm, 580 mm

Saddle

AUTHOR Racer

Seatpost

alloy (27.2)

Type: Rigid

Pedals

plastic

Groupset
Rear Derailleur

SHIMANO TX800

Crank

PROWHEEL, 32 teeth, 140 mm cranks

Shifters

SHIMANO Acera (8)

Cassette

SHIMANO CS-HG31-8, 11-34 teeth (8)

Chain

KMC Z8.3

Brakes

TEKTRO HD-J2820, disc hydraulic (6" rotors)

Type: Tektro Hydraulic Disc

Wheels
Rims

alloy, 28 holes

Spokes

black stainless steel 1.8 mm

Front Hub

QUANDO Disc, 28 holes

Rear Hub

QUANDO Disc, 28 holes

Tires

KENDA Aptor 24" x 1.95"

Rider Notes
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First added December 6

Last updated May 30