Size Guide

Prevelo Bike Sizing

Getting your kids the right size bike is important and, fortunately, also easy. You just need two pieces of information about your little rider:

  • Inseam
  • Rider Experience

Measuring Inseam

  1. Have the rider stand against a wall, hold a book between their legs so that it is firmly against their crotch (the same place their bicycle seat will be).
  2. Measure the distance from the floor to the top of the book.

Rider Experience

Children who are learning are more sensitive to bicycle height than children who already know how to ride a bike. For this reason, our recommendations for bicycle sizing vary slightly based on the experience lever of the rider. The chart below takes into account the fact that experienced riders tend to adapt better to a bike that is slightly larger. For this purpose we categorize young riders as either "Learners" or "Pedalers"

  • Learner: riders who either have not yet learned to ride a pedal bike, or are still frequently putting their feet on the ground while riding.
  • Pedaler: riders who can ride confidently and only put their feet down to stop.
Model Wheel
Approx. Rider Age
Learner Inseam
Pedaler Inseam
Alpha Zero 12" 1½ + 12.5 to 16.5
Alpha One 14" 3 to 5 13.5 to 16.5 13 to 16.5
Alpha Two 16" 4 to 6 16.5 to 22
15 to 22 
Alpha Three 20" 5 to 9 20 to 23 17.5 to 23
Alpha Four 24" 7 to 11 24.5 to 28 23 to 28
Zulu Three 20" 5½ to 9 22 to 26 20 to 25
Zulu Four 24" 8 to 11 25 to 29 23 to 29

Zulu One: Sold Out - Back in Spring 2020

Wheel Size
14 inches

Approx. Age Range
3 to 5 years


No Training Wheels
Optimized for 2 wheels

$15 Shipping
in the Continental USA

Shipping Terms

Checked and Tuned
Each bike is checked & tuned prior to shipment.

Easy Assembly
Includes all the tools you need & easy instructions.

1% for the Planet
Prevelo donates 1% of sales to planet worthy causes.

NOTE: Zulu Ones shipped within the United States come with a coaster brake. The package also includes a separate wheel with a freewheel and disc brake rotor that can be installed by the customer. Please call if you have questions.
The Prevelo Zulu One packs high performance mountain bike features into a tiny 14-inch wheel size package. Every component is the real deal and is carefully chosen to provide the best performance and fit for young riders ready to tear up the trails. It features:
  1. Prevelo confidence inspiring low and narrow geometry. Prevelo geometry keeps the rider low, balanced and in control.
  2. Ships with a bonus short seat post for additional height adjustment.  Includes the tool required to change seat post.
  3. Lightweight 6061 aluminum frame with custom formed tubing and BOXT rear stays and forged rear dropouts.
  4. Lightweight aluminum alloy fork with chromoly steerer.
  5. Tektro front and rear hydraulic disc brakes with reach adjustable short levers.
  6. Three piece crank with squared taper cartridge bearing bottom bracket and ultra narrow Q factor.
  7. Custom made cranks. All Prevelo cranks are sized specifically for each model bike, down to the millimeter.
  8. Double alloy chain wheel guard.
  9. 95% assembled. Just install the handlebar, seatpost, and pedals.

What the bicycle media is saying

two wheeling tots logo

The Prevelo Zulu One is the best 14" mountain bike we've ever encountered.

Kid Centric Features

prevelo kids mountain bike crank

Kid Engineered Crank

prevelo kids mountain bike disc brake

Tektro Hydraulic Disc Brakes

prevelo kids saddle

Ergonomic Kids Saddle

Prevelo Confidence Inspiring Geometry
Slack, Long and Low



Sealed Bearings

prevelo kids mountain bike tire

14 x 2.1 Trail Specific Tires

prevelo kids mountain bike dropout

Built Kid Tough with BOXT Rear Stays

zulu one jump

100% Kid Powered


prevelo zulu one 14


Customer Reviews

5 Based on 10 Reviews
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Customer Photos
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    United States United States

    Amazing Quality

    The craftsmanship and quality is unparalleled in kids bikes from any manufacturer I know. I bought this bike after tons of research and talking with people who have one and everyone said this was THE best kids bike on the market . They weren’t lying so happy with this bike!

    Anonymous verified customer review of Zulu One
    Bruce E.
    United States United States

    Great product

    My grandson has been on his balance bike since two, now at 32 months we gave him the Zulu One. He saw bigger kids, us and parents peddling and was asking if he could peddle too. In three days on his new bike he was handling it well, balance, peddle and brakes!

    Bruce E. verified customer review of Zulu OneBruce E. verified customer review of Zulu OneBruce E. verified customer review of Zulu One
    Matt M.
    United States United States

    Zulu one

    Thank you very much for the quality bicycle and great customer service. My grandson loves his new “big bike”. This bike should hold up well. I have received many compliments on the Zulu one

    Jared J.
    United States United States

    Best kids bike out there!

    I have been around and worked in the bike industry for years so I know a quality bike when I see it. And honestly, this bike is second to none. The amount of increased confidence and desire to ride that my 3 year old daughter experienced within 1 hour after getting on here Zulu 1 is staggering. Do your kiddo a favor and buy them this bike! You’ll be setting them up for a lifetime of happiness and health on 2 wheels.

    Jared J. verified customer review of Zulu One
    Nick S.
    United States

    Awesome Bike

    This is a very very well built bike that can take the abuse of kids!