I have a 97 Toyota t100 and I put 2012 Toyota Tacoma stock wheels and tires 18 inch on the t100 now I'm getting a rough ride at speeds 45 or over steering wheel shaking any suggestions to fix this problem?

 

Tires balanced?
all your steering parts & front end(ball joints, wheel bearings, TRE's etc) components in good shape?

 

My front end parts are good only change in the driving was when I swapped rims and tires. I guess I'll take the to get balanced. Im thinking is got something to do with differen't offset wheels?

 

Even though they are 2012 rims, anytime I swap rims, I have just the rim put on a tire balancer without the tire and make sure they are round and true. Previous owner may have hit a pot hole in the road and damaged them. A lesson I learned the hard way.