The Prevelo Bike-o-matic 3000

Step 1: Choose to size by either inseam or height (inseam is more accurate)

Step 2:

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.

Inseam vs. Height vs. Age

Inseam is the most reliable size indicator. If you don't have the rider's inseam, but know the rider's height you can use the rider's height to size a bike. We do not recommend sizing based on age. 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.

Riding Style

When riding dirt jump and pump tracks, like the Bravo Series is designed for, many riders are most comfortable on a slightly smaller bike. Many riders go to a smaller wheel size for Bravo Series bikes.

ModelMin InseamMax InseamMin HeightMax Height
Alpha Zero12½ in 16½ 33 in 43 in
Alpha One14 in 17½ 35 in 44.5 in
Alpha Two15½ in 22 38 in 44.5 in
Alpha Three19 in 23 42.5 in 52.5 in
Alpha Four23 in 28 49.5 in 59.5 in
Alpha Five25 in 30 53.5 in 64.5 in
Zulu One14 in 17 36.5 in 43 in
Zulu Two16 in 22 39.5 in 54.5 in
Zulu Three21 in 26 46.5 in 58 in
Zulu Four24 in 29 50 in 60.5 in
Zulu Five26.5 in 31 54 in 66 in
Bravo Two16 in -- 40 in --
Bravo Three20.5 in -- 45 in --
Bravo Four24 in -- 51 in --