Precaliber 12 Boys' | Trek Bikes (AU)
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SALE 2019

Precaliber 12 Boys'

$199.99 $249.99 Model 21883

Precaliber 12 Boy's is the perfect first bike for little riders who are ahead of the curve and ready for two wheels at a younger age than most. It has a handle built into the saddle so you can guide them as they ride, and tool-less stabilisers that are super-easy to install and remove. It's a great fit for kids aged 3-4, between 34–40˝ (86–102 cm) tall. 

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It's right for you if...

Your kid may be young and small, but they're ready to ride!You want to make their first real bike experience a great one with a bike that's comfortable, durable and fun. You also understand the importance of adjustability and want to be able to pop off the stabilisers without tools and adjust the fit easily when the time is right. 

The tech you get

This toddler-friendly bike has a handle built right into the saddle so you can help guide your child while they ride, plus tool-less stabilisers that can be installed and removed at the turn of a dial. The lightweight aluminium frame is easy for your little one to manoeuvre, and it's equipped with parts that are easy to adjust as they grow.

The final word

When it comes to your child's first bike, you want to make sure they're riding something that's comfortable, durable and fun. Each of our bikes, all the way down to the smallest size, is built to our highest standards, so you can feel confident when you choose Trek for your family. 

favorite_borderWhy you'll love it

  1. This bike is a memory-maker: seeing your child ride their bike for the first time is something you'll never forget
  2. We all know that kids grow up fast, and our adjustable Dialed Fit system allows this bike to grow with them
  3. This bike is hand-me-down heaven: it's built to last, so younger siblings can inherit this bike and it'll still feel like new
  4. You shouldn't buy your kid's bike where you buy your cereal – Unlike big box brands, Trek kids' bikes are assembled by people who know bikes



  • Frameset

    12˝ Dialed frame size, Alpha Silver Aluminium
    Dialed 12˝, high-tensile steel
  • Wheels

    Front hub
    Rear hub
    Coaster brake
    12˝ 20-hole alloy
    Bontrager Dialed 12x1.75˝
  • Drivetrain

    Alloy, 26T w/chainguard
    Bottom bracket
    Sealed cartridge
    Dialed 1/2˝, platform
  • Components

    Dialed 12˝ size, padded
    Integrated with saddle
    Dialed 12˝ size
    Dialled, Kraton
    Alloy, 4 bolt
    Head set
    Adjustable ball bearing
  • Accessories

    Trek adjustable and tool-less stabilisers, integrated saddle handle
  • Weight

    7.67 kg/16.9 lbs
    Weight limit
    This bike has a maximum total weight limit (combined weight of bicycle, rider,and cargo) of 36 kg (80 lb).
We reserve the right to make changes to the product information contained on this site at any time without notice, including with respect to equipment, specifications, models, colors, and materials.
Bike and frame weights are based on Trek pre-production painted frames at the time of publication. Weights may vary in final production

Sizing & fit

Proper bike fit is essential for best performance and comfort. Any size and geometry measurements shown on are for general comparison purposes only. To find your perfect fit, visit an authorised Trek retailer, where an expert skilled at sizing will help you find the appropriate bike and size for your individual needs.


Rider Height

All measurements provided in cm unless otherwise stated.

Wheel size A — Seat tube B — Seat tube angle C — Head tube length D — Head angle E — Effective top tube G — Bottom bracket drop H — Chainstay length I — Offset J — Trail K — Wheelbase L — Standover M — Frame reach N — Frame stack Saddle rail height minimum (w/short mast) Saddle rail height maximum (w/tall mast)
12" kids' 17.5 69.0° 8.5 69.0° 36.6 -1.0 23.1 2.0 3.9 62.2 36.3 26.3 26.9 41.5 50.5

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