Tire size for wheels

Hello, I’m new to karting. I have 5/5 and a 5/7- 3/4 , wheels. What size mg reds do I need?

The class dictates the tire size. The typical adult 2 cycle kart uses 4.6 front and 7.1 rear tires.

206 karts typically use 4.6 front and 6.0 rear tires.

Your rear wheel width looks a little narrow to be used with a 7.1 inch wide tire.

Check the rules of your local kart series.