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AskAuthor A-Matrix 24D 2026 (matte titanium/black/red)
The Author A-Matrix 24D is a bike for kids who have mastered the basics and want to get closer to the feel of a "real" mountain bike.
For young riders ready to take the next step
Sportier geometry, quality components and a higher level of control give young riders the confidence to tackle faster riding, longer routes and more technical sections.
The lightweight aluminium frame combined with a suspension fork helps handle rough terrain, while reliable hydraulic disc brakes provide precise, safe braking in every situation. The A-Matrix 24D is the ideal transition between a kids bike and a junior MTB – with no compromise on handling or safety.
The ideal choice for children 125–140 cm tall who want to ride actively, take on new challenges and have a bike that grows with them.
Technical features for confidence and control
- KENDA Aptor 24x 1.95 tyres – stability and better off-road rolling
- Suitable for rider height 125–140 cm – ergonomics adapted to growing riders
- Lightweight aluminium frame – low weight, strength and long service life
- ZOOM suspension fork – more comfort and control over bumps
- SHIMANO, 8-speed – a wide gear range for hills and fast riding
- TEKTRO hydraulic disc brakes – strong, sensitive braking in all weathers
The Author A-Matrix 24D is a bike that gives young riders more control, more options and more confidence. A natural step towards real cycling – safely, sportily and with a desire to ride further.
Geometry
| size | min. height | max height | s_t_c_t | s_t_c_c | t_t_h | t_t_a | h_t | c_s | w_b | s_t_ang | h_t_ang | f_l | bb_drop | reach | stack | f_r | handlebars | stem | crank |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 12.5" | 125 | 140 | 318 | 492 | 100 | 395 | 956 | 73.5 | 70 | 410 | 20 | 345 | 494 | 42 |
Additional information
 |  |  |
| speeds: | 8 |
| frame: | hliník 24 |
| pedals: | plast |
| front wheel / hub: | QUANDO Disc, 28 děr |
| rear wheel / hub: | QUANDO Disc, 28 děr |
| tires: | KENDA Aptor 24 x 1.95 |
| rear derailleur: | SHIMANO TX800 |
| saddle: | AUTHOR Racer |
| chain: | KMC Z8.3 |
| fork: | ZOOM Disc 24 (50 mm) |
| brake levers: | TEKTRO HD-J2820 |
| brakes: | TEKTRO HD-J2820, kotoučové hydraulické (6″ kotouče) |
| shifters: | SHIMANO Acera (8) |
| cranks: | PROWHEEL, 32 zubů, 140 mm kliky |
| cassette: | SHIMANO CS-HG31-8, 11-34 zubů (8) |
| manufacturer code: | 42963601 |
| EAN: | 8590816089723 |
| seatpost: | Hliník (27.2) |
| model year: | 2026 |
