You should be at least 5 feet 4 inches tall to comfortably ride a 29-inch bike.
About 4'8-5'1.
when you sit on the bike, you should be able to touch the ground with your toes.
If you can sit on the bike and touch the floor with your feet, you are tall enough for the bike
To determine if the bike is too tall for you to ride comfortably, sit on the bike and make sure both feet can touch the ground flat. If you can't touch the ground comfortably, the bike may be too tall for you.
A bike for a 4 year old normally requires stabilizers, unless at least he or she is able to ride solo. A typical bike that suits this purpose is one with a mountain bike (MTB) frame.
For someone who is 5'2 tall, a bike with a frame size of around 15-16 inches would be a good fit. It's important to test ride different sizes to find the most comfortable one for you.
Tall enough so that when sitting on the bike, you can place both feet securely on the ground.
it depends on how tall you are if your somewhere between 5.3 and 5.5 you should get a 125cc but I can ride a 125cc and im only 5.1 it just depends on how good of a rider you are.if you between 5.6 and 5.10 you should get a 150cc dirtbike.If your 5.11 or taller you can ride any dirt bike you want.
There is not a specific height you have to be... it all depends on how comfortable you are on that bike. I ride a RM 125 and i can hardly touch the ground, yet i race it. I would suggest starting out with as big of a bike as you can get. -woody.eldridge@yahoo.com
A tall man looking for a comfortable and suitable ride should consider a bike with a larger frame size and adjustable components for a customized fit. Bikes with relaxed geometry, such as touring or hybrid bikes, may provide a more comfortable riding position. It is recommended to test ride different bikes to find the best fit for your body type and riding style.
Building a tall bike involves extending the frame and adding longer forks to raise the height of the bike. You will also need to adjust the seat and handlebars accordingly for a comfortable riding position. It is important to ensure the bike remains stable and safe to ride after modifications.
Well, you probably don't want to be any shorter than 5 ft. without making serious modifications to the bike.