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


We will be closed Nov 9 - 15. Orders will ship Nov 16.

Zulu One: In Stock

Wheel Size
14 inches

Approx. Age Range
3 to 5 years


Fast and Free Shipping

Shipping Terms

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

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

  • 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.
  • Specifications

    Weight (without pedals) 15.9 lbs / 7.2 kg
    Minimum Saddle Height 16 in / 406 mm
    Maximum Saddle Height 25.0 in / 635 mm
    Bottom Bracket Height 7.1 in / 182 mm
    Gain Ratio 3.7


    zulu one kids mountain bike 14 geo
    A Wheel Size 14"
    B Wheelbase 27.1 in / 688 mm
    C Effective Top Tube Length 13.0 in / 330 mm
    D Head Angle 66°
    E Seat Tube Angle 74°
    F Chain Stay Length 10.6 in / 270 mm
  • Components

    FRAME 6061 heat treated aluminum alloy custom formed tubing
    FORK Rigid lightweight aluminum alloy fork with chromoly steerer - 40mm wide short offset fork legs
    SEAT CLAMP Aluminum alloy
    FRONT BRAKE Tektro hydraulic with 140mm rotor
    REAR BRAKE Tektro hydraulic with 140mm rotor
    CRANK SET Prevelo alloy 3-piece square taper with 85MM crank length
    SPROCKET 25T with dual alloy chainring guards
    BB SET Sealed cartridge
    HEAD SET 1 1/8" threadless
    RIM Aluminum
    FRONT HUB Lightweight alloy 1-piece forged CNC
    REAR HUB Lightweight alloy 1-piece forged CNC with 14T Freewheel Cog
    TIRE & TUBE Innova MTB 14 × 2.1 - Presta valve tube
    SADDLE Prevelo small kid saddle
    HANDLEBAR HEIR aluminum medium bore - 520mm width x 35mm rise with 25.4mm to 19mm taper
    HANDLEBAR STEM HEIR 30mm extension
    GRIP Kraton rubber
    PEDAL Composite with 9/16 chromoly axle
  • Trying to decide between the Alpha One and the Zulu One? Click here to learn the difference:  
  • Custom Color Grips

    Customize your new Prevelo with grips in the rider's favorite color. Made for Prevelo out of 100% silicone by ESI in Southern California.  We will install the grips on your Zulu One before shipping.

    custom grip colorsprevelo custom colored grips


    Rider Name Lettering

    • Custom cut out of 2.5 mil vinyl right here at Prevelo HQ in California and applied to BOTH seatstays before shipment.
    • With a bit of work the decal can be removed when it comes time to hand the bike down.


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


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Kevin L.
United States

Best Bike In It’s Class

Our son loves this bike. It’s close to the ground so it instills confidence he’s already riding down a couple of stairs thanks to the slack geometry. And the 14” wheels are perfect for his 4 year old body. Just a great bike there is nothing else like it.

Kevin L. verified customer review of Zulu OneKevin L. verified customer review of Zulu One