Alpha One

125 reviews
Speed Silver
Braap Blue
Party Pink
Rapid Red
$19 shipping
in the Continental USA
Checked and Tuned
Each bike is checked & tuned prior to shipment.
Easy Assembly
Includes all the tools you need & easy instructions.

Loaded with Features Obsessively Thought Out for Kids



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  and the wall (the same place their bicycle seat will be).
  2. Measure the distance from the floor to the top of the book.
Prevelo Bike Inseam Kid

Rider Experience

Children who are learning are more sensitive to bicycle height than children who already know how to ride a bike. If the rider is new we recommend erring on the side of a smaller bike.  If the rider is experienced and confident, it is OK to err on the side of a larger bike.


We include ride age as guidance for our bikes as a quick reference. But because riders of the same age can have very different sizes, inseam is a more reliable size indicator than age.

    ModelMin InseamMax Inseam
    Alpha Zero12½ in16½ in
    Alpha One14 in17½ in
    Alpha Two15½ in22 in
    Alpha Three19 in23 in
    Alpha Four23 in28 in
    Alpha Five25 in30 in
    Zulu One14 in17 in
    Zulu Two16 in22 in
    Zulu Three21 in26 in
    Zulu Four24 in29 in
    Zulu Five25 in31 in

    Alpha One Assembly

    What the Bike Media is Saying


    One of the Best Kids Bikes of 2018

    "a ton of smart features"

    two wheeling tots

    "Exceptional ★★★★★....With high-end components, sophisticated, yet kid-specific design, and durability to last through several kids, you'll be wishing you were small enough to ride the Alpha One."

    Customer Reviews
    4.9 Based on 125 Reviews
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    Filter Reviews:
      Ryan O.
      United States United States
      • How would you rate the fit? SmallPerfectLarge
      • Rider's age in years 4

      We love our Alpha One

      I have a smaller than average four year old daughter (15' inseam) who had mastered her balance bike, but was struggling to ride her hand-me-down pedal bike because it was just too big for her to ride comfortably. We bought the Alpha one because of the low saddle height, and she was riding on her own the same day because she was able to have her feet flat on ground and finally feel comfortable enough to ride solo. The bike itself is built very well, and would last many kids which is a shame that my daughter is our last child so I won't be able to use this for again. I wish I would have discovered Prevelo years ago. Also, the purple color is amazing and adds to her excitement for riding. I now have a scheduled ride every night after I get home from work around the neighborhood as we cruise past much older, and bigger boys, who are still struggling with ill-fitted bikes with training wheels.

      Prevelo Bikes Alpha One Review
      Arnold D.
      United States United States
      • How would you rate the fit? SmallPerfectLarge
      • Rider's age in years 5

      Prevelo Alpha One

      The Alpha One is absolutely perfect for our 5 year old son! He transitioned from riding a balance bike to his Alpha One on the first day we got it and we couldn’t be happier! We are extremely grateful for the Prevelo team shipping the bike to us about one month before we were expecting it and for providing a military discount on top of that! We will definitely be recommending Prevelo to our friends and family in the future for their high quality products and top notch customer service!

      Jean P.
      Canada Canada
      • How would you rate the fit? SmallPerfectLarge
      • Rider's age in years 4

      The best bike and even better customer service!

      We ordered an Alpha One for our son's fourth birthday. He has been riding a balance bike for two years but had never used anything with pedals before. Half an hour after he got the bike, he was starting to put his feet up on the pedals and do a couple of rotations, and after an hour he was pedaling for several seconds. After that he was unstoppable, and 5 days after he got the bike, he went on a 8km ride! He also figured out the hand brakes without a problem. He says that it's the best present he's ever gotten! This bike is very high quality construction, nice and light, and fits him perfectly. He's low to the ground and we can tell that he feels comfortable and not "tippy". And, throughout our purchase, Jacob's customer service was incredible! He was friendly and helpful with sizing advice, and sent out the bike as quickly as he could so that it was here by my son's birthday.

      Jonathan K.


      I know a bit about bikes. After a childhood love affair with bikes led to a semi-pro cycling career after high school and university I opened and ran a successful bike shop for 12 years. When my daughter was born I left the bike industry but bikes never left me. When I had to buy my daughter her first bike :-) only the best would do. Abi's Prevelo is long and stable, the fork angle is perfect and the 14"wheels are like 29ers for a 3yo and yet the standover is lower than any competitor. The bike is light, easy to handle and every part is quality material. Specially conceived Q-factor, crank arm length, handlebar diameter and brake lever reach. There is nothing else on the market that comes close. Thank you, Jacob and company!

      Prevelo Bikes Alpha One ReviewPrevelo Bikes Alpha One ReviewPrevelo Bikes Alpha One Review
      Tanner P.

      Nothing compares

      The Alpha One is our family's second Prevelo. Our older son got an Alpha Two for his 4th birthday and we got the Alpha One for younger brother's 3rd birthday. Following the how to ride tips on the Prevelo blog, our new 3 year old was riding in a couple practice sessions. A month later he's tearing up a pump track and just rode for 6 miles. The Alpha One makes riding easier and therefore much more enjoyable. A few thoughts if you're considering the Alpha One: - Seat height matters. The low center of gravity makes a world of difference when learning to ride. Can't possibly overemphasize how important that is. - Freewheel is a must. You have to have a freewheel and hand brakes to make a good transition from a balance bike. The occasional stop in pedaling or accidental backwards pedal is a non-issue with a freewheel but will cause a spill with a coaster brake. - Resist the "grow into it temptation." By measurement our 3yr old was right at the low end of the Alpha Two range, which was very tempting. Jacob suggested the Alpha One and I'm so glad that's what we got. The frame and geometry are sized appropriately and set our son up for success. Measure it's worth by the amount of miles and smiles, not years. - Looking online doesn't do these bikes justice. Neighbors and co-worker dads are blown away at the difference in quality between the Prevelo and bike shop or department store bikes. The build quality and components are top notch. - If what you want is backordered, it's worth the wait. I waited a month after our kid's birthday for a backordered Prevelo - there's nothing else comparable with such a low seat height. Sure, he didn't have the bike with the balloon on it on his birthday, but that's how much I value the quality of the Prevelo and I'd do it again.