ADULT BIKES

The Prevelo Bike Sizer 3000

What's the difference?

Balance bike: For riders who are using a balance bike without pedals.

Learning to pedal: The rider has never ridden a two-wheel pedal bike without assistance or training wheels, and is ready to learn to pedal. For new riders, we prioritize a slightly smaller fit to make learning easier and less intimidating.

Knows how to ride: The rider can pedal a two-wheel bike independently without assistance. For these riders, we prioritize a fit that balances comfort, control, and more efficient ergonomics.



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.

Which Prevelo bike is right for your child?

Use your child's inseam (inner-leg measurement) as the main sizing guide, with age as a rough starting point. Then choose a series by where they ride: Alpha for streets and paved paths, Zulu for trails and mountain biking, and Bravo for pump tracks and dirt jumps. When a rider is between sizes, the smaller wheel is easier to handle and the larger gives more room to grow. Each model links to its full specs.

Alpha Series

Best forStreets, paved paths and light trailsRider levelBeginner to advanced riders
Model Wheel size Rider age Recommended inseam Min. saddle height Weight *Price
Alpha Zero 12 inches ~ 1½ + 12½ to 16½ inches 10.9 in / 277 mm 6.9 lbs$259
Alpha One 14 inches ~ 3 to 5 14 to 17½ inches 14.75 in / 375 mm 11.3 lbs$489
Alpha Two 16 inches ~ 4 to 6 15½ to 22 inches 16.9 in / 430 mm 12.1 lbs$509
Alpha Three 20 inches ~ 5 to 9 19 to 23 inches 21.2 in / 540mm 16.9 lbs$759
Alpha Four 24 inches ~ 7 to 11 23 to 28 inches 26.1 in / 665mm 19.2 lbs$799
Alpha Five 26 inches ~ 9 to 13 25 to 30 inches 28 in / 712mm 21.5 lbs$859
Shop Alpha Series →

Zulu Series

Best forTrails and mountain bikingRider levelBeginner to advanced riders
Model Wheel size Rider age Recommended inseam Min. saddle height Weight *Price
Zulu One 14 inches ~ 3 to 5 14 to 17 inches 15.5 in / 395 mm 13.5 lbs$649
Zulu Two 16 inches ~ 4 to 6 16 to 22 inches 17.7 in / 450 mm 15.1 to 15.8 lbs$699
Zulu Three 20 inches ~ 5½ to 9 20 to 26 inches 21.7 in / 550 mm 20.5 lbs$1,299
Zulu Four 24 inches ~ 8 to 11 23 to 29 inches 24.8 in / 630 mm 22 lbs$1,399
Zulu Five 26 inches ~ 9 to 13 26.5 to 31 inches 27.6 in / 700mm 23.3 lbs$1,499
Shop Zulu Series →

Bravo Series

Best forPump tracks and dirt jumpsRider levelConfident to advanced riders
Model Wheel size Rider age Recommended inseam Min. saddle height Weight *Price
Bravo Two 16 inches ~ 4½ to 7 16 inches and up 17.5 in / 444mm 16.8 lbs$999
Bravo Three 20 inches ~ 6 to 10 20.5 inches and up 21.75 in / 552mm 19.8 lbs$1,199
Bravo Four 24 inches ~ 8 to 13 24 inches and up 25 in / 635 mm 21.5 lbs$1,299
Shop Bravo Series →

* without pedals

Have more questions about sizing, fit, and setup? See our Knowledge Base or contact us.