Trek Youth Precaliber 12 Bike
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.

Frameset
Frame  Alpha Silver Aluminum, 12'' kids' frame size
Fork  Steel, 12'', threadless 1'' steerer
Wheels
Hub front  Steel, 84mm bolt-on
Hub rear  Coaster brake, 16T, 120mm bolt-on
Rim  Alloy 12'', 20-hole, schrader valve
Tire  Bontrager XR1, wire bead, 27 tpi., 12x2.25''
Drivetrain
Crank  Alloy, 26T, chainguard, 70mm length
Bottom bracket  Square taper, 68mm, sealed cartridge
Chain  HV410, 1/2x1/8
Pedal  Kids' Satellite, 9/16 thread
Components
Saddle  Kids' padded, integrated seatpost, with handle
Handlebar  Kids' steel, 25.4mm clamp, 80mm rise, 500mm width
Grips  Kids' grip, 107mm width
Stem  Bontrager Approved alloy, 25.4mm clamp, 15 degree rise, 50mm
Headset  1'' threadless
Accessories
Training wheel  Training Wheel Trek Dialed 12''
Weight
Weight  6.98 kg / 15.38 lbs
Weight limit  This bike has a maximum total weight limit (combined weight of bicycle, rider, and cargo) of 80 pounds (36 kg).