Author A-Matrix 24 2025 (lime/black/blue)
Wheel diameter 24"
□ Suitable for rider height 125–140 cm
□ Weight 11.7 kg
□ Lightweight aluminium frame
□ SHIMANO components, 18-speed
□ RST Capa suspension fork
□ VP cartridge bottom bracket
The best-selling model in the 24" bike category has long been the Author A-Matrix 24. It is designed for children aged 6–9 years with a height of 125–140 cm. This versatile model handles family rides at a relaxed pace as well as more adventurous trips on off-road trails in nature. It isnt afraid of the occasional sporty outing at kids races either. It does all this at a reasonable price, making it the ideal choice for those who prefer excellent value for money. It features a lightweight aluminium frame and an RST suspension fork with a soft spring. For easier handling, the model has a single chainring at the front and 8 speeds at the rear, all operated with a classic Shimano Revoshift twist shifter. Two colour versions, with the fork and saddle colour-matched to the rest of the bike. Quality branded Tektro brakes ensure safe stopping. In a nutshell, one of the most popular kids bikes.
Frame geometry
| Size | min height | max height | S/T c-t | S/T c-c | T/T h | T/T a | H/Tt | C/S | W/B | S/T ang. | H/T ang. | F/L | B/B | reach | stack | F/R | hb | stem | crank |
| 12.5" | 125 | 140 | 318 | 492 | 480 | 100 | 395 | 956 | 73.5 | 70 | 410 | 20 | 42 |
- S/T c-t - seat tube (center-top), seat tube length from the centre of the bottom bracket to its top
- S/T c-c - seat tube (center-center), seat tube length from the centre of the bottom bracket to the top tube axis
- T/T h - top tube horizontal, horizontal top tube length
- T/T a - top tube actual, actual top tube length
- H/T - head tube, head tube length
- C/S - chain stay, chainstay length
- W/B - wheel base, wheelbase (distance between the front and rear wheel axles)
- S/T ang. - seat tube angle, angle between the seat tube axis and an imaginary line connecting the front and rear wheel axles
- H/T ang. - head tube angle, angle between the head tube axis and an imaginary line connecting the front and rear wheel axles
- F/L - fork length, fork length from the bottom of the headset to the centre of the front wheel
- B/B drop - bottom bracket drop, distance between an imaginary line connecting the wheel centres and the centre of the bottom bracket
- F/R - fork rake, distance between the head tube axis and the fork axle measured at the centre of the front wheel, the so-called offset
- hb - handlebars
- stem - stem
- crank - cranks
Additional information
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| frame: | dural 6061 24 |
| pedals: | plast |
| front wheel / hub: | QUANDO, 32 děr / dural, 32 děr |
| rear wheel / hub: | QUANDO, 32 děr / dural, 32 děr |
| tires: | AUTHOR Speed Master, 24x1.75 |
| rear derailleur: | SHIMANO TX800 |
| saddle: | AUTHOR |
| chain: | KMC Z8.3 |
| fork: | RST Capa T 24 (50 mm) |
| brake levers: | TEKTRO dural |
| brakes: | TEKTRO V |
| shifters: | SHIMANO Revoshift (8) |
| cranks: | PROWHEEL, 32 zubů, 152 mm kliky / VP COMP, zapouzdřené |
| cassette: | SHIMANO CS-HG31-8, 11-34 (8) |
| EAN: | 8590816087385 |
| seatpost: | dural (27.2) |
| model year: | 2025 |


















































































































































































































































































































































































































































































