NEED HELP ON THE OFFSET FOR A SUZU HOMBRE

SCOOTER IS GETTIN A NEW SET OF WHEELS AND ISNT SURE WHAT OFFSET AND BACKSPACIN HE NEEDS,WHAT IS GONA BE THE BEST SIZE 18" WHEEL FOR THIS TRUCK AND THE DESIGN OF THE PAINT JOB

depends on how wide it is, use this guide once you get a couple sizes in mind:

http://www.s10forum.com/new-updated-rim-tire-fitment-for-s-trucks

kool so im guessin a 18x7 would require a 4"bs and a 18x8 would be a 4.5bs????

am i readin that right???????