Ready to ride
The bike is always professionally tuned and ready to go.
We will be happy to advise you
We provide expert advice on selection and configuration.
Free warranty inspection
Free warranty inspection after driving 200–500 km
Official TREK Store
Lifetime warranty on the frame, Crash Replacement, Carbon Care.
There are many children's bikes on the market that have one major problem – they are too heavy. This is due to cheaper (and therefore heavier) materials, which applies not only to the frame but also to the components. Our ARX children's bikes, on the other hand, are designed to be as light as possible, making cycling easy, safe, and fun for children.
ALUXX Aluminum Technology | ![]() |
ARX bikes are built around a high-quality ALUXX aluminum frame and aluminum fork, both manufactured in our own factory. The frame geometry is designed with a lower center of gravity for improved stability. The ARX 20 model is available in several different colors so that children can choose the color they really like. We have also achieved a low weight for the entire bike with high-quality (and lightweight) components that are designed specifically for children's bikes. We should mention the easy-to-use V-brakes, precise Shimano Altus shifting and derailleur, aluminum cranks, rims and wheel hubs, and tires with optimal width and tread.
Founded in 1972, Giant is the largest bicycle manufacturer in the world.
Giant is the world's leading brand of high quality bicycles and cycling equipment. As part of the Giant Group, founded in 1972, the Giant brand combines craftsmanship, advanced technology and innovative design.
Giant has long been one of the leading innovators in cycling. They introduced lighter and stronger aluminium frames at a time when steel was the industry standard. They were the first to make carbon fibre bikes widely available to the world. They defined modern road bike design with Compact Road geometry. And the patented Maestro suspension revolutionized the full-suspension bike segment.
| Sizes | One size (20" wheels) |
| Color | Phoenix Fire, Cobalt, Soap Suds, Lime Punch, Metallic Green, Mushroom |
| Frame | ALUXX-grade aluminum |
| Fork | alloy |
| Shock absorber | - |
| Handlebars | Giant Youth, 480mm width, 31.8mm |
| Grips | Giant Junior |
| Stem | Ahead, alloy, 25.4x60mm |
| Seatpost | alloy, 27.2mm |
| Saddle | Selle Royal Vivo Jr. |
| Pedals | platform |
| Shifters | Shimano Altus SL-M315 |
| Front derailleur | - |
| Rear derailleur | Shimano Altus RD-M310 |
| Brakes | alloy, linear pull |
| Brake levers | alloy, junior MTB |
| Cassette | Shimano HG200, 12x32 |
| Chain | KMC Z8 |
| Cranks | alloy, forged, three-piece, 32t, 115mm |
| Bottom bracket | sealed cartridge |
| Rims | Giant Kids 20", alloy |
| Hubs | alloy, F 24h QR, R 24h |
| Spokes | stainless, 14g |
| Tires | Innova IB-3010, 20x1.5" |
| Accessories | bell, rear derailleur guard, chain guide |
| Weight | Unfortunately, there is no standard for weighing bikes that all manufacturers adhere to, and the weights listed are often inaccurate. To find out the exact weight of a bike in a given size, you need to have the bike weighed at the store, as well as a model from a competing brand – this is the only way to get accurate figures for weight comparison.
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