changing tyre size for blazer k5
 

Hello everyone


I own a 82' blazer k5 5.0L.
The size of the tyres listed on my vehicle licence is 31/10.5/15.
I would like to change it to 33/12.5/15.
The problem is that the ministry of transportation here does not have the Autodata of such an old vehicle so I can't get O.K. for that change.
They told me that if I could get some kind of an official reference from abroad (Autodata USA Eg) that this change can be technically done they will confirm my request.
I wonder if someone can help me by sending the required information?

33 inch tires might rub. i had a 85 k5 blazer with a 2 inch body lift and new 33/12.50 inch tires and they would hit around tight corners or hitting hard bumps like backing out of the driveway with the tires turned