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20″ air filled tires. Quick release seat post. 8×1 geartrain with trigger shift. Disc brakes. Lightweight aluminum frame and fork. 3-piece crank. Wide, stable handlebars. The PARK 20 opens up new possibilities for your kid to crush the street, park, trail, and more.

SKU: PK019 Categories: , ,
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(6 customer reviews)

PARK 20 Kids Bike

Cruise the streets and paths, and even tackle new terrain and explore trails with the larger 20″ tires and simple gearing. This is the perfect 20 inch bike for your kid ready to move up from a 16″ bike.

Forth PARK 20 Pedal Bike - Intense Pink - ISO ViewLightweight, strong and durable aluminum frameset is designed to go from street riding to bike parks or trails.
Forth PARK 20 Pedal Bike - Intense Pink - front fork
Sure-stopping mechanical disc brakes mounted to a sturdy aluminum fork. Forth PARK 20 Pedal Bike - Intense Pink - controls
Comfortable cockpit with wide, stable handlebar featuring lock-on grips, trigger shifter, and easy-squeeze brake levers. Forth PARK 20 Pedal Bike - Intense Pink - drivetrainWell-equipped Shimano drivetrain keeps your rider rolling smooth and efficient.


6061 Heat Treated Aluminum


Aluminum Tig Welded

Fork Adjustment


Handlebar Diameter

25.4 mm, 22.2 mm (at grips)

Handlebar Width

560 mm

Handlebar Rise

40 mm

Handlebar Sweep

10 degrees


115 mm, lock-on

Stem Type


Stem Diameter

22.2 mm

Stem Dimensions

L:40 mm H:41 mm Rise:10°

Seatpost Diameter

27.2 mm

Seatpost Length

250 mm




Platform, Composite, 95 x 85 mm, 9/16" thread


Tektro MD-M280 Mechanical Disc


Shimano SL-M315-8R – 8 speed


Shimano Tourney RD-TX800 – 8 speed


Shimano HG-200-8 – 11-32T


KMC – Z6


Samox Alloy – 25T

Crank Arm Length

127 mm

Bottom Bracket

Neco – B910

Brake Rotor Size

F:160 mm R:160 mm

Brake Levers

Tektro – JL510-TS


20” x 1.75, Alloy


Jackl – Alloy, Sealed Bearings, Quick Release


Kenda Small Block 20" x 2.1

Weight (w/o pedals)

9.39 kg (20.7 lbs)

Min. Seat Height




Forth Bike Geometry

WB – Wheelbase: 832 mm
FC – Front Center: 484 mm
RC – Rear Center: 350 mm
TTL – Top Tube Length (effective): 439 mm
Reach: 296 mm
Stack: 419 mm
HTA – Head Tube Angle: 69.0 °
HTL – Head Tube Length: 100 mm
FL – Fork Length: 330 mm
STA – Seat Tube Angle: 71.0 °
STL – Seat Tube Length: 275 mm
BB – Bottom Bracket Rise (Drop): (30 mm)

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.

6 reviews for PARK 20

  1. Cory (verified owner)

    I got the Park 20 for my 5 year-old son as an upgrade from his single speed coaster break bike so he can go on trail rides with me and his older brother. Before I found Forth Bikes, I did a ton of research and narrowed it down to a few common 20″ bikes, but I’m so glad I eventually found out about the Park 20. We’ve only had it for a few weeks, but so far this bike is great! The best part is that it was over $100 cheaper than the big name brands, but as far as I can tell it has all the same level of components and build quality. My only gripe so far is that the derailleur and rear brake cables are not covered with housings all the way back, but this is a minor thing that I can live with. Don’t hesitate of you’re on the fence like I was, buy this sucker and watch your kid have a blast on their first mountain bike!

  2. Clay

    Got this for my 6-year old as he had outgrown his 16″ bike. He loves riding it and I love the value. Great build with attention to detail. Like the other review above, I too would appreciate full cable housing along the entire length. This is definitely the best bang for your bike “serious” bike for your kid on the market. Just buy it.

  3. Holley Mathiesen (verified owner)

    We took a bit of a risk, jumping from the Park 14” bike to the Forth 20” for our 5-yr-old daughter, who is 45” tall. SO glad we did! She fits great and has ALL the confidence on her new bike!

  4. Carl Lauren (verified owner)

    We like everything about the bike. We bought a Park 20 for our 6 year old and he loves it and excels on it. We had a small warranty issue and it was addressed and rectified immediately. Great bike, great customer service.

  5. Jeanne (verified owner)

    My 6 year is confidently riding roads, hills , and easy trails. He’s come up through the park line of bikes and was just now ready for the min standover height. He’s naturally in a very good riding position due to bike geometry and adjusted so quickly to the trigger shifters. Bike was a pretty easy assembly with video guidance. Rocket red colour is lovely albeit every so slightly pinkish is the right light.

  6. Fred (verified owner)

    We just purchased the Forth Park 20 for our 7 year old grandson. Great value, prompt delivery, super easy to assemble and adjust. I like the kid-perfect geometry and quality components. Trigger shifter, Shimano 8 speed cassette, Tektro disc brakes, Kenda knobby tires, lightweight aluminum frame. The little guy instantly started zipping around the neighborhood, negotiating hills and gravel paths with ease. He’s a happy guy. Nice job, Forth.

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