Gain Ratio = (Radius of Rear Wheel ÷ Crank Length) x (Number of Teeth in Chain Ring ÷ Number of Teeth in Rear Cog)
Use
Dirt path, single-track
Wheel Size
14 in
Age
~ 3 to 5 years
Type
Mountain Bike
Weight
13.5 lbs
Inseam
14" to 17"
Description
The new Zulu One builds on its legacy of innovation with significant weight reductions and groundbreaking BALANCE-TEC™ conversion system. The patent-pending BALANCE-TEC system is the first-ever balance-bike-to-pedal-bike conversion that doesn't compromise pedaling performance.
The Zulu One features:
- A new smaller rear cog combined with a smaller chainring reduces weight while maintaining climbing-friendly gear ratios
- Adjustable rear dropouts enable precise chain tension and wheelbase tuning
- THRU-TUBE seat tube design increases fit range to accommodate growing riders
- Sealed cartridge bearings throughout for superior durability
- High-volume Kenda Booster tires for improved traction and ride comfort
- Hydraulic disc brakes deliver category-leading control and safety
Measurements
Gain Ratio = (Radius of Rear Wheel ÷ Crank Length) x (Number of Teeth in Chain Ring ÷ Number of Teeth in Rear Cog)
Components
Size Guide

Balance-Tec™
Kid Optimized Cockpit
THRU-TUBE™ Frame
Precision Dropouts
Compact Drivetrain and Kid Size Cranks
Promax Hydraulic Disc Brakes
Zulu One
I purchased the Zulu One for my 2.5 yr old who is showing balance and the desire to lift his feet on the current balance bike and just coast. I am truly blow away by the quality of this bike and its customization. The bike was packaged with quality, thought, and care—clearly with the customer in mind. The bike itself is a beast. This thing could be thrown off a cliff and be just fine. I have no doubt my little dude will have this for years to come in multiple phases of his childhood. Amazing product with OUTSTANDING quality.
Buy this for your little shredder!
We love this bike. It arrived early, was well packaged, and easy to assemble. Now my little guy can join me on the trails, and I couldn't be happier!
Enabler!
Had the bike for 2 1/2 weeks now, and we have unlocked new levels. Learning to use the brakes combined with learning to kick speed and start pedaling to get going independently and put the feet to the ground while braking to stop without falling over has made it possible for me as a dad to grab my own bike and ride along rather than running behind to save her from falling over. Now we can cover new ground and go for longer rides, and she just wants to go riding at every opportunity. I have added a kidreel for towing uphill, which definitely is recommended accessories. Great bike, well done! Will surely stop by for tacos if we ever make it across the pond:)
Customer for life
I cannot recommend Prevelo enough. As an avid cyclist (mostly mountain) I very much appreciate that Prevelo recognizes that coaster brakes are a big hinderance to establishing good habits and an enjoyable experience. Having the option to get a rear disc brake with a freehub was a major consideration for purchasing my son(s) a bike. The quality of the Zulu one is exactly what I was looking for in a kids bike. The thought was put in for all of the components– both size and quality. I'm confident that this bike will be able to handle my first son and be able to be handed down to my second son. The geometry was also well thought out. Especially with mountain biking, giving kids a confidence inspiring ride is extremely important. On top of all of that Jacob really took care of me and made sure I was able to get my son a bike in time for his 3rd birthday. In just a few emails, it became abundantly clearly that Jacob takes great pride in what he does. That is the type of person and company that I want to support. I encourage you to do the same.
The BEST!!!
Ok, so my husband and I did months of research before buying our 3 y.o daughter a bike. We are mtn bikers ourselves and really want her to learn right from the start! The addition wheel and back disc brake is great! The hand brakes are UNREAL!! She can reach them, and she can pull them with literally two fingers!!! It’s mind blowing how good this bike is. We could not be any happier with our purchase and are having so much fun teaching her the basics. Thanks prevelo for producing such an incredible quality bike for this age. Our daughter is pretty small for her age and this bike is going to last us 2 years for sure!