I've been thinking of getting some 19'' rims, but I also knw that you risk horse power loss by putting a bigger wheel. So do any off you know how mush of a decrease I would be looking at. And yes my car is natrually asperated with a cold air intake, and axle baxk exaust. So if you have the slightests of answeres I would realy appreciate the info.

 

i don't think you could put a number to it, just think of it this way; it's adding unnecessary weight, and since the weight is unsprung, handling, braking, tire wear, and your suspension are all negatively affected.

however, i don't think it's that big of a deal if you aren't aiming for the most power that your car can possibly put to the ground. if you're just doing it for looks and don't mind making the sacrifice, go ahead and do it. i'll probably go with 19's the next time i change wheels.

 

One pound of "unsprung" weight is equal to 8 pounds of "sprung" weight. Depending on the weight of your wheel/tire combo compared to stock, you could be adding a lot of unsprung weight.

You're adding a lot of unsprung weight by getting larger, heavier wheels... not to mention you're also pushing the rotational mass of the wheel OUTWARD, which makes it harder to turn (Requires more work). There's no magic number that's used to determine how much the performance is hurt.. the only real way is to tell via a dyno test with before/after results.

 

Unless you go with lightweight wheels, you'll feel the lagginess...If you have an auto, you'll DEFINATELY feel it.

Going from the stock 17's to 23lb 18" Unknowns created a definate decrease in speed for me. I noticed it right when i got off the lot :\

 

the heavier the rims. ummm. more gas burning. yeeii

 

ok ok so maybe now ill go with an 18" wheel, and yes im trying to get the most power out of the vehicle. the optional 18's from the factory sya that they are the "same weight" as the stiock 17'', so if i can find a nice after market whell do u think that would be best. i think i read some where(been a while) that our cars were made for an 18" upgrade and wouldnt affect the drivability

 

ironically enough, the owner's manual says that putting 18's on would dramatically decrease gas mileage and stuff....it doesn't say "larger wheels" it says "18" wheels" specficially.

Either way, many are running them..

There is no best wheel. It's all personal preference. I would suggest that you also research a wheel's weight when making your decision.