rear tire size

[studysession]

From what I have read so far - Seems a lot of the frame size and what size of engine is all based on rear tire size.


What size of tire is to big for a mini-bike? This will be driven mostly on the street (not off road). I'd like to make one using a car tire but unsure how that would work.

Thanks -
Keith

 

[Gokarts4Life-11]

A car tire will be way to big, I think that the max height should be around 18 inches, but it all depends on the size of your engine and chassis.

 

[studysession]

Thanks -
At 18 inches, what is the widest you would recommend and how much power would it take to push it at a decent speed?

 

[Gokarts4Life-11]

Once again it depends on how wide your frame is, you can get 18 tires that are 5 inches wide or 10 inches wide, with the right gear ratio and lets say a 6.5 hp engine you could probably get to 40mph but the acceleration might not be to hot. With a torque converter it would be easy.

 

[studysession]

I am going to build the frame. Trying to decide motor and engine to help me determine how wide the frame needs to be etc....

 

[studysession]

Thanks for the help -

Just shows I have a lot of planning to do before I start.

 

[mckutzy]

On my build I bought one of those 6.5hp honda clones and then started to collect stuff for it. I found a car spare and decided to build the frame around that, its 15"rim 24"OD 5 3/8" wide. My bike doesnt have super fast take off but it does haul a$$ pretty fast once its going.