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20 X2


Hydraulic Disc Brakes. Microshift 9-speed drivetrain with trigger shift. Atlas Air Fork. 20″ knobby tires for off-road riding. Lightweight aluminum hydroformed frame with internal routing. Wide, stable handlebars. Quick release seat post. The Forth 20 X2 opens up new possibilities for your kid to crush more single-track, dirt park, or whatever else gets thrown at it.

SKU: PK028 Categories: , , ,
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(1 customer review)

20 X2 Kids Bike

Forth 20 X2 Pedal Bike - Aviator Grey - ISO View
Lightweight, durable aluminum hydroformed frame.

Forth 20 X2 Pedal Bike - Aviator Grey - front fork
Atlas air fork with lockout and rebound adjustment, along with Shimano hydraulic disc brakes.

Forth 20 X2 Pedal Bike - Aviator Grey - controls
Wide, stable controls, with lock-on grips, trigger shifter, and easy squeeze brake levers.

Forth 20 X2 Pedal Bike - Aviator Grey - drivetrain
Wide-ratio microSHIFT drivetrain will take your little rider further, higher, and faster, with less effort.


AHF-6061 Heat Treated, Hydroformed Aluminum


Atlas Air Fork

Fork Travel

80 mm

Fork Adjustment

Rebound, Compression, Lockout

Handlebar Diameter

31.8 mm, 22.2 mm (at grips)

Handlebar Width

600 mm

Handlebar Rise

20 mm

Handlebar Sweep

9 degrees


115 mm, lock-on

Stem Type

Zoom – Alloy

Stem Diameter

31.8 mm

Stem Dimensions

L:35 mm H:36 mm

Seatpost Diameter

27.2 mm

Seatpost Length

250 mm




Platform, Alloy, 108 x 95mm, 9/16" thread


Shimano BR-MT200 Hydraulic Disc

Brake Levers

Shimano BL-MT200


microSHIFT SL-M6190-R – 9 speed


microSHIFT RD-M6195S – 9 speed


microSHIFT CS-H093 – 11-38T


KMC – Z9


Prowheel Alloy – 30T

Crank Arm Length

127 mm

Bottom Bracket

Neco – B910


20” x 1.75, Alloy


Jackl – Alloy, Sealed Bearings, Quick Release


Bend Sender – 20" x 2.3

Weight (w/o pedals)

10.9 kg (24.0 lbs)

Min. Seat Height


Brake Rotor Size

F:160 mm R:160 mm

Forth Bike Geometry

WB – Wheelbase: 857 mm
FC – Front Center: 519 mm
RC – Rear Center: 340 mm
TTL – Top Tube Length (effective): 449 mm
Reach: 319 mm
Stack: 424 mm
HTA – Head Tube Angle: 69.0 °
HTL – Head Tube Length: 100 mm
FL – Fork Length: 352 mm
STA – Seat Tube Angle: 71.0 °
STL – Seat Tube Length: 275 mm
BB – Bottom Bracket Rise (Drop):

Kids Bike Sizing Chart

Sizing a bike for your child is tricky. Kids grow fast! Getting them on a properly sized bike will help grow confidence and set them up for years of success riding bikes. Happy kids will result in happy parents! We’ve put together a “rough” size chart to help you get started. We’re not guaranteeing this will be 100% accurate, but based on our experience, this at least provides a place to start:

Forth Bike Size Chart
*There are many factors affecting sizing. This is a only guide, but may not be accurate for every kid.

For further sizing tips/advice, check out our page on choosing the right bike for your child.

1 review for 20 X2

  1. Shaun

    I have been searching for a high-quality bike designed for kids, and unfortunately, many of the large adult bike brands seem to put most of their attention into adult bikes and not the kid bikes. That is why I am so happy I found Forth Bikes. These kids’ bikes are beautifully designed with fantastic components. My son loves the bike, and it will allow him to venture into the wonderful world of mountain biking!

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