i have a 90 gts with 17 inch rims, should i have 45s on there now and theyr too big should i go with 40s or 35s for my new tires. thanks

the origional tires were 50s with 17 inch wheels

For 17 inch wheels you will want to go with 215/40-17 for your size tire to keep the correct speed-o reading.

thanks