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2026 Author

A-Matrix 27.5D

A 27.5″ aluminum frame road youth bike with mid-range components and tektro hydraulic disc brakes.
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Weight30.4 lbs  
FrameAluminum
SuspensionHardtail, 80mm
Wheels27.5″ Aluminum
Drivetrain1 × 9
GroupsetCUES
BrakesTektro Hydraulic Disc
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Insights
Ride Feel

Based on frame geometry and build specs.

Rider Position
relaxedaggressive
A-Matrix 27.5D
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)

24 mph

A-Matrix 27.5D

Highest gear

(descending)

Sizing
14"

4'7" – 5'3"

16"

5'1" – 5'7"

Rider Fit Notes

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Geometry
Specs
Build
Frame

alloy 27.5"

Colors: White / Silver / Gold; Black / Red

Fork

SUNTOUR XCE28 27.5 (80 mm)

Travel: 80mm

Spring Type: Coil

Stem

alloy

Handlebar

alloy, rise 20 mm, 640 mm

Saddle

AUTHOR Cadet

Seatpost

alloy (27.2)

Type: Rigid

Pedals

plastic

Groupset
Rear Derailleur

SHIMANO Cues 4000

Crank

PROWHEEL, 32 teeth, 165/170 mm cranks

Shifters

SHIMANO Cues 4000 (9)

Cassette

SHIMANO CS-LG300-9, 11-46 teeth (9)

Chain

KMC XGlide

Brakes

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

Type: Tektro Hydraulic Disc

Wheels
Rims

AUTHOR Argon 27.5, 28 holes

Spokes

black stainless steel 1.8 mm

Front Hub

QUANDO Disc, 28 holes

Rear Hub

QUANDO Disc, 28 holes

Tires

KENDA Aptor 27.5" x 2.10"

Rider Notes
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First added January 5

Last updated May 30