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.

Help them gain confidence

A hidden handle under the saddle helps you guide your child along while they gain confidence and learn to ride on two wheels.

Smaller grips for little hands

Smaller diameter grips make it easy for little hands to stay in control and navigate their next turn.

Lightweight aluminum frame

All Trek kids' bikes are built with lightweight and easy-to-maneuver aluminum frames that are durable enough for whatever adventures lie ahead.

Reliable coaster brake

Coaster brakes engage when pedaling backward to help new riders learn how to stop intuitively.

Removable training wheels

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

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 Number	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'

Size

12