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:

Wheel Size
14 inches

Approx. Age Range
3 to 5 years


No Training Wheels
Optimized for 2 wheels

$15 ShippingIn 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.

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 6 reviews
5 ★
4 ★
3 ★
2 ★
1 ★
Customer Photos
Write a Review
  • Reviews

Thank you for submitting a review!

Your input is very much appreciated. Share it with your friends so they can enjoy it too!

    Nick S.
    United States

    Awesome Bike

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

    Timothy M.
    United States

    Wonderful bike!

    The Zulu One is the perfect bike for transitioning to a pedal bike for younger and shorter children. My 3-yo had been riding a couple of different push bikes since he was one, and has been asking for a pedal bike. Although he had never pedaled anything before, he was able to balance and started pedaling on his first ride. The additional short seat post and overall ergonomics of the bike are perfect, and the bike will grow with him for several years. I also like that there are real hand brakes instead of coaster brakes, and they are very adjustable. My son is learning to use them instead of learning to use coaster brakes, which he won't have on his bigger bikes. This was a major selling point. Finally, the build of the bike is top-notch. It's not too heavy and will last a long time. This is good not just because it is bound to take some hits from my son, but it will retain it's resale value for the future.

    Chris S.
    United States

    Kiddo loves it!

    I bought this for my son to upgrade from a balance bike. The Zulu One fits him perfectly (he's five, and about 41" tall), and the disc brakes are an awesome addition. It does great on dirt, and I can't wait to take him on some longer rides!


    Very cool Bike!

    I'm excite..... and I would like to be a little boy again!

    United States

    Top quality!

    Worth every penny, no doubt. For the very first real bike I see no better option.