Precaliber 12 12 Flamingo Pink

Precaliber 12 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-free training wheels that are super easy to install and remove. It's a great fit for kids ages 3-4, between 36-40˝ tall.

• This bike is a memory-maker: seeing your child ride their bike for the first time is something you'll never forget
• 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
• Investing in a kids' bike from an established bike brand is worth it—Trek kids' bikes are designed and assembled by people who know bikes
• Like all Precaliber bikes, the frame is lower so it's easier for kids to stand over and hop on and off

Integrated handle

Hidden handle under the saddle helps you guide your child while they learn to ride.

Toolless training wheels

When your little one is ready to ditch the training wheels, the only tools you'll need are your hands.

A better way to produce aluminum

Starting in 2024, we began removing high-emission aluminum from our manufacturing and replacing it with low-emission aluminum made with renewable energy. By October 2025, nearly every alloy bike we make - this one included - had made the switch, driving a major drop in our footprint.

Upgrade your pedals and love your bike more

Pedals are two of the five touchpoints that connect you with your bike, and even though this bike comes with a pair, upgrading to pedals that boost control and grip will greatly improve your ride. See the pedal guide and find the best pedals for your riding style. We recommend flat pedals for simple versatility.

Frame	Alpha Silver Aluminum, 12'' kids' frame size
Fork	Steel, 12'', threadless 1'' steerer
Tire	Bontrager XR1, wire bead, 27 tpi., 12x2.25''
Hub Front	Steel, 84mm bolt-on
Hub Rear	Coaster brake, 16T, 120mm bolt-on
Rim	Alloy 12'', 20-hole, schrader valve
Crank	Alloy, 24T steel ring, chainguard, 70mm length
Bottom Bracket	Square taper, 68mm, sealed cartridge
Chain	HV410, 1/2x1/8
Pedal	Kids' Satellite, 9/16 thread
Saddle	Kids' padded, integrated seatpost, with handle
Handlebar	Kids' steel, 25.4mm clamp, 80mm rise, 500mm width
Stem	Bontrager Approved alloy, 25.4mm clamp, 15 degree rise, 50mm
Headset	Adjustable ball bearing
Grips	Kids' grip, 107mm width

Geometry Chart

B B Drop	0.5
B B Height	16.2
Chainstay Length	24.3
Eff Top Tube	36.5
Frame Reach	26
Frame Size Letter	12"
Frame Stack	44.1
Head Angle	70.0°
Head Tube Length	8
Offset	2.5
Seat Tube	17.5
Seat Tube Angle	69.5°
Standover	34.3
Trail	3.4
Wheelbase	62.9
Wheel Size	12" kids'