Trek Precaliber 20

Precaliber 20 Coaster Brake will have your little rider begging to go out for a pedal on their first real big kid bike. It's a great transition model from training wheels. It has one speed, a coaster brake, and a saddle with an integrated handle that can be swapped out for a light mount. For kids ages 6-8, between 45-52˝ tall.

• One speed is all you need—a simple set-up gives kids confidence and helps them stay in control
• Coaster brakes are simple and intuitive for kids to use—they just pedal backwards to stop!
• You can replace the saddle's integrated handle with an integrated light mount to boost visibility on family adventures and solo excursions
• Like all Precaliber bikes, the frame is lower so it's easier for kids to stand over and hop on and off
• 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

Integrated handle

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

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, 20'' kids' frame size
Fork	Kid's steel fork
Tire	Bontrager XR1, wire bead, 27 tpi., 20x2.25''
Hub Front	Steel, 100mm, nutted axle
Hub Rear	Coaster brake, 19T, 110mm bolt-on
Rim	Alloy 20'', 32-hole, schrader valve
Crank	ProWheel alloy, 32T steel ring w/double guard, 127mm length
Bottom Bracket	Square taper, 68mm, sealed cartridge
Chain	HV410, 1/2x1/8
Brake	Alloy linear-pull
Brake Lever	Kids', alloy
Pedal	Kids' Satellite, 9/16 thread
Saddle	Kids' padded, integrated seatpost, with handle
Handlebar	Kids' steel, 25.4mm clamp, 40mm rise, 560mm width
Stem	Bontrager Approved alloy, 25.4mm clamp, 15 degree rise, 60mm
Headset	Adjustable ball bearing, threadless
Grips	Kids' grip, 107mm width

Geometry Chart

B B Drop	3
B B Height	23.8
Chainstay Length	37.2
Eff Top Tube	44.5
Frame Reach	31.2
Frame Size Letter	20"
Frame Stack	40.6
Head Angle	70.0°
Head Tube Length	8.5
Offset	4.2
Seat Tube	25.5
Seat Tube Angle	72.0°
Standover	47.6
Trail	5.3
Wheelbase	86.5
Wheel Size	20" kids'

Size

S