I have 86 z w original door frame stickers & that is the size it came with

 

I have an 89 Iroc and I am wanting to put on 275/30/20 on the rear and 245/35/20 on the front. would they fit?

 

whats the biggest tire/rim combo on we can put on stock 87 GTA

 

hey guys and girls was quickly looking thew this thread to see if there was a mention on different tire size for a gta rim so i,m hoping it the right thread to ask in but i got a 1984 trans-an with 88 ground effect and 88 gta rims the proper two at the front and the proper two at the rear of the vehicle what i want to now is the tire size on them is a 235/55/16 the steel belt are showing on the tire from four years of wear and tear as are the back tires showing sever weather cracking on the side walls so i don,t feel safe driving the car now i am finding it hard to find a decent used set of tires for the car in that size (p235/55/16) was wonder what other tire size i can use that won,t have me needing to space the tires and i,m not to worried about a little rubbing your replies would be appreciated