The AUTHOR A-Matrix 24D is a junior hardtail bike with 24-inch wheels, designed for active riding in the city, parks, bike paths, and light gravel routes. The model is built around a lightweight aluminium frame in size 12.5" and is suitable for riders approximately 125–140 cm tall. It features a ZOOM Disc 24 suspension fork with 50 mm travel, an 8-speed Shimano drivetrain, and Tektro hydraulic disc brakes for reliable and controlled stopping power.

With its 24-inch wheels, comfortable geometry, and easy-to-use drivetrain, the AUTHOR A-Matrix is a great option for young riders moving to a more capable junior bike.

Main specifications:

• Model: AUTHOR A-Matrix 24D
• Model year: 2026
• Bike type: junior mountain bike, hardtail
• Frame size: 12.5"
• Recommended rider height: 125–140 cm
• Frame material: aluminium
• Frame: aluminium 24" L
• Wheel size: 24"
• Front fork: ZOOM Disc 24
• Fork travel: 50 mm
• Headset: PRESTINE Integrated 1-1/8"
• Number of speeds: 8
• Rear derailleur: SHIMANO TX800
• Shifters: SHIMANO Acera, 8-speed
• Cassette: SHIMANO CS-HG31-8, 11–34T
• Crankset: PROWHEEL, 32T
• Crank length: 140 mm
• Bottom bracket: VP COMP cartridge
• Chain: KMC Z8.3
• Brakes: TEKTRO HD-J2820 hydraulic disc brakes
• Rotors: 6"
• Brake levers: TEKTRO HD-J2820
• Hubs: QUANDO Disc, 28 holes
• Rims: aluminium, 28 holes
• Spokes: black steel, 1.8 mm
• Front tire: KENDA Aptor 24" x 1.95"
• Rear tire: KENDA Aptor 24" x 1.95"
• Handlebar: alloy rise 20 mm, 580 mm width
• Grips: AUTHOR kraton rubber
• Stem: aluminium
• Seatpost: aluminium, 27.2 mm
• Seat clamp: AUTHOR, 31.8 mm
• Saddle: AUTHOR Racer
• Pedals: plastic
• Weight: 12.8 kg

The AUTHOR A-Matrix 24D is a practical choice for young riders who need a reliable bike with an aluminium frame, quality Shimano components, comfortable front suspension, and efficient hydraulic disc brakes.