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Kids' bike 12-inch Trek Precaliber 12 viper red
Kids' bike 12-inch Trek Precaliber 12 red for 0.86 to 1.02 m, saddle handle, 6.84 kg
$454.81
Incl. Tax
Recommended supplier selling price in 2026
Trek Precaliber 12 Viper Red: a sturdy little bike for those first rides
Bold Viper Red and an Alpha Silver aluminium frame: the Trek Precaliber 12 is a first bike built to last, happy to be handed down from an older child to a little brother or sister. It rolls on 12-inch wheels, has a coaster brake and weighs 6.84 kg according to Trek. Trek recommends it for children from 86 to 102 cm, or 3 and 4 year olds.
Technical specifications
| Frame | Alpha Silver aluminium, 12-inch kids' frame |
| Fork | Steel, 1-inch straight steerer |
| Drivetrain | 1 speed: 70 mm alloy chainset, 24-tooth steel chainring with chain guard, HV410 chain |
| Brakes | Coaster brake in the rear hub (16 teeth) |
| Wheels / tyres | 12-inch alloy rims, 20 spokes, Schrader valve / Bontrager XR1 12 x 2.25-inch |
| Cockpit | 500 mm steel handlebar, 80 mm rise, 50 mm Bontrager stem, 107 mm kids' grips |
| Saddle / seatpost | Padded kids' saddle, integrated seatpost and parent handle |
| Equipment | Removable stabilisers, kids' satellite pedals |
| Weight | 6.84 kg, one size (Trek figure) |
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At a glance
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Who is it for?
For families who want a sturdy first bike rather than a toy, one that can take falls, being left out in the rain and the passing years. It is made for children eager to ride like their older siblings, and for parents who want to guide them without running bent double behind them.
The LVR workshop view
Alpha Silver aluminium, a grown-up frame on a 12-inch bike. Alpha is the name Trek gives to its aluminium alloys, and the Silver version is also used on its adult Marlin mountain bikes. On this Precaliber 12, it forms a small frame that will not rust, paired with a steel fork that shrugs off falls and kerbs. The 24-tooth chainring is hidden behind a chain guard, so fingers and trousers stay well clear.
| Precaliber 12 | Precaliber 16 | Precaliber 20 Freewheel | |
| Stage | First pedal bike | After the 12-inch | First big-kid bike |
| Frame / fork | Alpha Silver alloy / steel | Alloy / steel | Alpha Silver alloy / steel |
| Reference bike | 6.84 kg, 86 to 102 cm | 8.35 kg, 99 to 117 cm | 9.45 kg, 114 to 132 cm |
| What it means | Brakes by pedalling backwards | Two hand brakes | Hand brakes, kickstand |
In other words: a 6.84 kg first pedal bike with no brake lever to operate, plus stabilisers and a saddle handle to help your child along. Trek recommends it for 3 and 4 year olds.
The aluminium frame will not rust, a real plus for a bike that often lives in the garage or on a patio. The steel fork takes knocks against kerbs, and the chain guard protects both curious fingers and trouser legs.
The 500 mm handlebar with its 80 mm rise keeps your child fairly upright, looking well ahead, which helps them keep their balance. The 107 mm kids' grips are sized for small hands. With the stabilisers on, they can take their first rides in a park; without them, they discover balance on a flat path.
Which Precaliber should you choose?
| Model | Wheels | Child's height | Gears / brakes | Weight |
| Precaliber 12 | 12 in | 86 to 102 cm | 1 speed, coaster brake | 6.84 kg |
| Precaliber 16 | 16 in | 99 to 117 cm | 1 speed, 2 V-brakes | 8.35 kg |
| Precaliber 20 Freewheel | 20 in | 114 to 132 cm | 1 speed, 2 V-brakes | 9.45 kg |
| Precaliber 20 7-speed | 20 in | 114 to 132 cm | 7 speeds, 2 V-brakes, 35 mm fork | 10.90 kg |
Our take: this Viper Red Precaliber 12 weighs 6.84 kg and fits children from 86 cm. When your child grows past 1 metre and wants hand brakes, the Precaliber 16 (8.35 kg) is the next step.
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LVR sizing advice Trek recommends this bike from 86 to 102 cm, which corresponds to 3 and 4 year olds according to its data. Sitting on the saddle, your child should be able to put both feet flat on the ground to feel safe. Come and try it with them in our Béziers shop: we adjust the saddle on the spot.
Source: Trek size guide. Bike fitting available in our Béziers shop. |
Your questions
| Can it be handed down to a younger sibling? | Yes, the aluminium frame and steel fork are built to last; a workshop check is all it needs. |
| When should the stabilisers come off? | As soon as your child pedals in a straight line and brakes on their own, often after a few weeks. |
| How do you pump up the tyres? | With a Schrader valve, the same as on a car. |
| Is the red bright? | Yes, it is a bold, vivid red that girls and boys love alike. |
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The LVR Cycles verdict A seriously built first bike, with an aluminium frame, steel fork and chain guard, ready to serve several children. Its bold Viper Red gives it the look of a real grown-up bike.
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Why buy from LVR Cycles? Our Béziers workshop checks the coaster brake, adjusts the saddle and handlebar to your child's height and inspects the bike before it is handed down to the next one.
TRK-5271577
Data sheet
- Application
- Kids Cycling / Beginner
- Year
- 2026
- Material
- Aluminum
- Gender
- Man - Unisex
- Promotion
- Moins de 10%
Specific References
- ean13
- 0601479150427
- upc
- 601479150427
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Kids' bike 12-inch Trek Precaliber 12 red for 0.86 to 1.02 m, saddle handle, 6.84 kg
