AUTHOR A-Matrix 24D 2026 12.5" White/Black/Blue

The Author A-Matrix 24D kids' bike is designed for children with a height of 125–140 cm who have already mastered the basics of riding and want to experience the feel of a real mountain bike. The lightweight aluminium frame, combined with a suspension fork, helps to handle uneven terrain. TEKTRO hydraulic disc brakes ensure safe stopping in any situation. Thanks to its sportier geometry and 8-speed Shimano derailleur, young riders will enjoy longer routes and more technical sections.

Frame and Fork for Off-Road Riding

The foundation of the bike is a lightweight duralumin frame with sporty geometry, which gives children confidence during faster rides and better control on varied terrain. The ZOOM suspension fork ensures comfort on uneven surfaces. It offers 50mm of travel, effectively absorbing shocks from roots or stones and allowing for a smoother ride over light terrain. Thanks to the low weight of the entire bike, it's easy for children to handle, not only when riding but also when carrying it.

Precise Shifting and Reliable Brakes

The bike is equipped with Shimano components that ensure smooth operation. Shimano Acera shifters combined with a Shimano TOURNEY RD-TX800 derailleur offer 8 speeds. A cassette with a range of 11–34 teeth provides plenty of gears for riding up hills and on flat ground. A key feature is the TEKTRO hydraulic disc brakes with 160mm diameter rotors. They provide high and easily modulated braking power in both dry and wet conditions.

Stable Wheels and Durable Components

The riding characteristics are supported by 24-inch wheels fitted with KENDA Aptor tyres. With a width of 1.95 inches, they provide good stability and grip on various surfaces. The rims are made of aluminium and have a double-wall construction, which increases their strength and durability. The bike is complemented by other aluminium components such as the handlebars, stem, and seatpost, which contribute to its overall low weight.