I always see people asking how big can i go
This is a list of the Biggest Meats you can tuck under a thirdgen at full jounce and rebound :

15-INCH 15x8 with 4 1/2-inch backspacing front and rear. Use tires with an aspect ratio of 55 or less with a section width of 255

16-inch 16x8 with 4 1/2-inch backspacing front, 5 1/8 backspacing rear. Use a tire with a aspect ratio of 55 or less and a section width of 255

17-inch 17x9 with 5 1/2-inch backspacing front and rear. Use tires with an aspect ratio of 40 or less with section widths of 255 front, 275 rear

18-inch 18x9 1/2 with 5 1/2-inch backspacing front, 18x10 with 6-inch backspacing Use tires with an aspect ratio of 35 or less with section width of 275 front, 275-295 rear

Hope this help's some to make their thirdgen the baddest on the block

 

hey just to let u know i fit a pair of 275/60/15 tires on a pair of 86 monte SS rims on my 87 and they fit fine didnt rub once, so 255 isnt the biggest u can go with a 15 inch rim ,

------------------
87 IROC-z 305 TPI 5spd Borg warner 9-bolt 3.45 posi 4 wheel disc,8.8 Accel wires , bosch platinum +4 plugs,gutted air box,k&n oil filter,synthetic oil 10w30

 

Thanks, I was just talking with my friend about the next set of tires I'm getting. Here is my question though. What if I have 1.5" lowering springs? Does that change anything in the front? I have 16x8 245/50 right now and I want to put on 255/55.

------------------
, Jon (91 RS too many mods to list), getting new engine in summer

 

I know you can put larger wheels and tires
ex: everyone putting 17x11 on the rear without problems. i was just putting what
CHP printed out there for everyone.

 

you can use larger tires. I saw a 91 T/A at a carshow that had 17x10s out back with 315s. Look like a friggin steamroller from the back.

------------------
91 Trans Am WS6
Bright White
5.0 TPI auto
Flowmaster 3" 2 chamber catback
Trans Go shiftkit
2000 stall converter

Built on Wednesday