just bought a 89 mallard sprinter, 22ft. back tires are coopers, srm2 8.00 r16.5 slt. still a lot of treadware+no cracking. on the front they had goodrich tires that are worn badly on the edges, due 2 either over inflating or aligenment? what i,d like to know is if it would unwise 2 buy just 2 new coopers for the front???? were talking 135 bucks a tire here. appreciate any info.