Thread: what size rim

i was wondering if anyone could tell me what the biggest rim i can ride on. i want to do 22"s but im affraid of messing up the transmission. i dont wanna go any smaller than a 20" tho. i was thinkin of maybe 22x8.5 or 20x8.5. let me kno what ya'll think.

anything bigger than the stockers is harder on your trans, but rims 8"-8.5" in width with a 42mm offset are the best bet So;

245/45 R18
245/40 R20
245/35? R22
Probably best tire sizes

20s on the 04+ body style look supreme. just remember to lower the car so it actually tucks and looks nice. 4x4 grand prix's are the worst.

yea it will definately be lowered. probably gonna do 20's with a 2" drop.

make sure you lower it correctly. you may need spacers for the motor/trans because of the offset geometry when you lower the car creating acceleration vibrations.

2" is a lot for these cars. intrax springs will do that for the most part, but the ride will be pretty harsh. coilovers are hella expensive.

Originally Posted by Bio248

make sure you lower it correctly. you may need spacers for the motor/trans because of the offset geometry when you lower the car creating acceleration vibrations.

2" is a lot for these cars. intrax springs will do that for the most part, but the ride will be pretty harsh. coilovers are hella expensive.

Be sure to look into these when you do this: http://www.grandprixforums.net/f51/m...back-1107.html

so what happens if i dont get the spacers? ive never heard of that and ive lowered alot of cars. never had any probs. the only springs i can find 1.75" drop so i might end up with that but i really dont think thats gonna be enough. are the spacers a must have?

without the spacers or shorter dogbones the car will more than likely have acceleration vibration. they arent very nice at all.

shorter dogbones are the easy way out. the plates that vinnie sells are the best way to go about it.

Originally Posted by 02BlueGT

anything bigger than the stockers is harder on your trans, but rims 8"-8.5" in width with a 42mm offset are the best bet So;

245/45 R18
245/40 R20
245/35? R22
Probably best tire sizes

Anything heavier than stocker is harder on your trans. I like 8.5" with +35mm offset myself. 245/40-20 is too tall of a tire. It is an inch larger diameter than stock. 245/35-20 would be closest at that width for 20s and to maintain near stock diameter for 22s you'd need a 245/25-22 (Do they even make that size?). Way too little sidewall in either case for me.

Out of your two choices, I'd definately say 20s. I'd go 19s, but have seen some really nice 04+ GPs with 20s and a few 97-03s that looked nice as well. I can't speak from personal experience as all of mine have had 17s/18s.

Never hurts to be on the safe side with the lowering as well. I'd hit him up for some spacers.

Good luck with whatever you choose!! Tastefully done, it will look beautiful!!

i run 20's and love them. also have a built tranny and am adding a 1" gmr chain in about two weeks

Originally Posted by suprchrgd

i run 20's and love them. also have a built tranny and am adding a 1" gmr chain in about two weeks

Yeah, Jason your's was the one I was thinking of for 97-03s running 20s. My favorite of this body style running them. Hell, one of my favorite GPs overall actually!

shut up ROC. 18s havin ass.

im either gonna cheap out and find some pregen 5-spokes so i can have a wider rim with a lower offset, or im going to go back with 19s and get a black set with a chrome lip.