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AskAuthor Cosmic 20 2025 (black/orange)
Wheel diameter 20"
□ Suitable for rider height 115–135 cm
□ Weight 8.8 kg
□ Lightweight aluminium frame
□ SHIMANO Revoshift components, 6-speed
□ TEKTRO V-brakes
□ Quality AUTHOR Speed Master 20" × 1.75" tyres
The best-selling model in this category and a true mainstay of the Author range – thats the Author Cosmic 20, which has been the benchmark in its class for many years. It is suitable for children aged around 4–6 years with a height of 115–135 cm. A lightweight aluminium frame with proven geometry, quality Shimano components and branded Tektro brakes make up a proven recipe for a successful kids bike. Several generations of children have already ridden it, and many older bikes are still faithfully in service. It even comes in 4 colour versions, so theres something for everyone. The ideal companion for a little cyclist on family trips along cycle paths and gravel forest and farm tracks.
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 |
| 10" | 115 | 135 | 254 | 435 | 420 | 90 | 360 | 836 | 73 | 72 | 316 | 10 | 35 |
Additional information
 |  |  |
| frame: | dural 6061 20 |
| pedals: | plast |
| front wheel / hub: | QUANDO, 20 děr / dural, 20 děr |
| rear wheel / hub: | QUANDO, 20 děr / dural, 20 děr |
| tires: | AUTHOR Speed Master, 20x1.75 |
| rear derailleur: | SHIMANO TY200 |
| saddle: | AUTHOR Pilot |
| chain: | KMC Z6 |
| fork: | hi-ten |
| brake levers: | TEKTRO dural |
| brakes: | TEKTRO V |
| shifters: | SHIMANO Revoshift (6) |
| cranks: | PROWHEEL, 36 zubů, 127 mm kliky / VP COMP |
| cassette: | SHIMANO MF-TZ510-6, 14-28 (6) |
| EAN: | 8590816087316 |
| seatpost: | dural (27.2) |
| model year: | 2025 |
