Hi Lucas92w
The tube is listed here
https://www.outdoorking.com.au/ride...ts/tube-13-x-5.00-x-6-bent-valve-ptu1862I take it If a tube is listed as "13 x 5.00 x 6", it is designed to fit a tire that is also sized "13 x 5.00 x 6".
13: This is the overall diameter of the tire when inflated, measured in inches.
5.00: This is the width of the tire across its tread, measured in inches.
6": This is the diameter of the rim (the metal wheel itself) that the tire mounts onto, measured in inches.
Cheers
Max.