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Trek Precaliber 20

Trek Precaliber 20
  • Color: Miami Green
  • Color: Viper Red
Color: Viper Red
Size: 20-inch
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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 backward 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


Your kid is ready to leave training wheels behind, and you want to get them a fun, durable, bike that's simple to use. You don't want to settle for a big box brand, because you know the value of a high-quality bike that will keep your kid confident and in control.


A lightweight Alpha Silver Aluminum frame, one speed, and a coaster brake. Plus, a kickstand and a saddle with an integrated handle that can be swapped out for an integrated taillight mount. Everything on this bike is built to last, so it'll still feel like new when handed down to younger siblings.


This bike is the perfect choice for young riders who want to transition from a little kid bike to a big kid bike, with a simple, quality frame that will keep them upright and smiling while they ride at the park with friends or on the local bike paths with your family.


Wheel size20" kids'
A - Seat tube (cm) 25.5
B - Seat tube angle 72.0°
C - Head tube length (cm) 8.5
D - Head angle 70.0°
E - Effective top tube (cm) 44.5
F - Bottom bracket height (cm) 23.8
G - Bottom bracket drop (cm) 3
H - Chainstay length (cm) 37.2
I - Offset (cm) 4.2
J - Trail (cm) 5.3
K - Wheelbase (cm) 86.5
L - Standover (cm) 47.6
M - Frame reach (cm) 31.2
N - Frame stack (cm) 40.6
SizeRider Height (cm)Rider Height (in)
20" 114 - 132 3'9" - 4'4"


Frame Alpha Silver Aluminum, 20'' kids' frame size
Fork Kid's steel fork
Rims Alloy 20'', 32-hole, schrader valve
Hubs Front: Steel, 100mm, nutted axle
Rear: Coaster brake, 19T, 110mm bolt-on
Tires Bontrager XR1, wire bead, 27 tpi., 20x2.25''
Bottom Bracket Square taper, 68mm, sealed cartridge
Crankset ProWheel alloy, 32T steel ring w/double guard, 127mm length
Chain HV410, 1/2x1/8
Brakes Alloy linear-pull
Brake Levers Kids', alloy
Handlebars Kids' steel, 25.4mm clamp, 40mm rise, 560mm width
Tape/Grips Kids' grip, 107mm width
Stem Bontrager Approved alloy, 25.4mm clamp, 15 degree rise, 60mm
Headset Adjustable ball bearing, threadless
Saddle Kids' padded, integrated seatpost, with handle
Pedals Kids' Satellite, 9/16 thread
Accessories & Extras Kickstand

* Subject to change without notice.


1971 Clamp Adapter for D-Shaped Seatposts

The 1971 installs onto the clamps found on most Park Tool repair stands to more securely hold D-shaped seatposts by converting one jaw profile to a flat surface. This is useful for bikes with D-shaped seatposts and other non-traditional designs that would cause a less-than-ideal fit in traditional repair stand jaws. The 1971 is designed to fit over a clamp's existing jaw covers and is easy to remove and install by hand, making it a convenient accessory for your repair stand. ? Fix It: Did you know that Park Tool is the #1 resource for bicycle repair education? • Visit our YouTube Channel: • Visit the Repair Help section of • Check out The Big Blue Book of Bicycle Repair: ? About Park Tool: Park Tool has been manufacturing bicycle specific tools since 1963. Based out of St. Paul Minnesota, we are the world's largest bicycle tool manufacturer. A long-term dedication to quality, innovation, and customer service has made Park Tool the first choice of professional and home bicycle mechanics around the world. ? Subscribe: ? Like: ? Follow:

Part Numbers

Option UPC MPN Store SKU
Viper Red / 20-inch 768682594964 5271612 PRE24916502D