PLEASE ENSURE YOU HAVE THE CORRECT SIZE BEFORE ORDERING. For the rear wheels: 9x8--This is a 9 inch diameter tire and the wheel is 8 inches wide; 3+5 backspacing is a 3 inch inset ( on inside) and 5 inch inset (on outside). Bolt pattern is 4/110. For the front wheels: 10x5-this is a 10 inch diameter tire and the wheel is 5 inches wide; 3+2 backspacing is a 4 inch inset (on inside) and 1 inch (on outside). Bolt pattern is 4/144. This size wheel is commonly used with extended width A-Arms. IMPORTANT---If you have any questions, please contact us and we will be very happy to help! Your satisfaction is guaranteed. If you receive these and are not happy, you can return them.