ZuluFour

Size Guide
Sizing

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
Size
Approx. Rider Age
(years)
Learner Inseam
(inches)
Pedaler Inseam
(inches)
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

16 reviews
Zulu Four: Back in Stock Spring 2020
Zulu Four HEIR: Back in Stock Spring 2020


Wheel Size
24 inches

Approx. Age Range
8 to 11 years

Speeds
10 or 12

Trail Optimized


$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: Final component spec is slightly different from the image above. See the "Components" section below for a detailed break down of the components included.
The Prevelo Zulu Four packs high performance mountain bike features into a 24-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. Zulu specific slack head tube angle and short chainstays keep the bike controlled over rough terrain.
  3. Lightweight aluminum frame with custom formed 6061 triple- butted tubing and TRAPT™ downtube profile.
  4. Available with a lightweight HEIR® 80mm travel airfork with HM Carbon Fiber / AL6061 lowers & AL7050 hard anodized 30mm stanchions and adjustable rebound, lockout and compression and 15mm Thru-Axle.
  5. Stealth cable routing and stealth dropper post ready.
  6. Available with tubeless ready wheels and tires.
  7. Rear hub with 12mm Thru-Axle.
  8. Flat mount rear brake caliper keeps the rear brake caliper tucked away and protected between the rear chain stays.
  9. Tektro front and rear hydraulic disc brakes.
  10. Wide Span Shimano drive trains and available with either SHIMANO DEORE SHADOW RD+ 10-speed or SHIMANO SLX 7100 12-speed 
  11. Available 10-51T wide span gearing gives riders plenty of range to spin up tough hills.
  12. Kid engineered direct mount crank. All Prevelo cranks are sized specifically for each model bike, down to the millimeter.
  13. 95% assembled. Just install the handlebar, seatpost, frontwheel, and pedals.



 Zulu Four HEIR


#zulufour

Customer Reviews
5 Based on 16 Reviews
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Filter Reviews:
    RM
    03/25/2019
    Ryan M.
    United States
    Amazing Product and value!

    The Zulu four is an amazing bike! This was a Christmas gift for my 6 year old - and it has helped to transform his riding! Before he was a solid rider on his 16” rigid single speed, we could do 4-6 miles rides, but there was many walking breaks. Now he flies! We’re up to 9-10 mile rides and he is pushing most of the hills and taking single track like a champ. He begs to ride more and is taking on obstacles like a stud. It did introduce a problem though, my 4.5 year old is chanceless of keeping up on the 16” hand me down bike and I’m eying the Zulu 3 20” for him. And Mom also needs and upgraded bike to keep up with him....

    Ryan M. verified customer review of Zulu FourRyan M. verified customer review of Zulu Four
    KJ
    08/18/2017
    Kelly J.
    American Fork, Utah
    Confidence Inspiring!

    This is the best kids hard tail mountain bike I've been able to find for under $1000 for my 9 year old son. The geometry on this bike is dialed for young riders! Low stand over and low bottom bracket equals more confidence and ability to control the bike. Correct width handlebars get your kid in a good riding position and improves handling. My son has been having a blast since throwing a leg over this bike. It's light enough for him to climb on real single track trails and built for shredding back down. Hydraulic disc brakes give him plenty of stopping power and keep his little hands from getting sore and tired. Real air fork, grippy tires, crisp shifting and plenty of gears to keep up with mom and dad. I'd recommend this bike to anyone looking to get their kids out on the trails! Thanks for making a proper mountain bike that works for the groms!

    CH
    01/03/2020
    Chad H.
    United States United States
    Top quality kids bikes

    We love this product. Hi quality and great customer service

    TZ
    01/01/2020
    Travis Z.
    United States United States
    Wow! Amazing Bikes!

    So glad we chose the Zulu Fours when it was time for the 9 year olds to upgrade. First day on these bikes and the kids were tackling sections they'd previously walked. The geometry is perfect, stand over height is great and the crank arm length is ideal. From the air fork to the components, everything is dialed. Jacob and his team were incredible to work with. They put a ton of thought into running an amazing business and building amazing bikes. The kids continuously ask when we're riding next and, as a biking family, that makes us smile. Thanks Prevelo!

    Travis Zarins verified customer review of Zulu FourTravis Zarins verified customer review of Zulu FourTravis Zarins verified customer review of Zulu Four
    TZ
    01/01/2020
    Travis Z.
    United States United States
    Wow! Amazing Bikes!

    Our 9 year olds were ready to upgrade and we're so glad we chose the Zulu Fours. These are phenomenal kids trail bikes with no detail overlooked. The geometry is perfect. Great stand over height, perfect crank arm length, and beautifully spec'd components that work flawlessly the minute they arrived. Jacob and his team are incredible. The type of folks you really want to work with. Our kids continuously ask when they can ride again....and that's a dream come true for a trail riding family!

    Travis Zarins verified customer review of Zulu FourTravis Zarins verified customer review of Zulu FourTravis Zarins verified customer review of Zulu Four

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