there are calculators online to find the correct, or at least close to correct, tire size in 20" diameter to equal the revs-per-mile you have with your current tires (one is on discounttiredirect.com). I agree the ride will suffer a little, but handling will prob be a lot tighter, and with the correct total diameter it will not effect the performance- at least until you get so involved in racing that you're worried about the difference in unsprung weight....
I only have 18's but I think 20's look better and fill the gigantic wheel wells better.
it will effect your take off and accel. do not do it that is alot of rotating mass and will make you slower not to mentiong the ride and handling will suffer you will feel every little bump alot more then you do know.
plus the braking power will be drastically reduced, you need no more then an 18" rim for ride and handling anything bigger is for show only.
i know this hot girl from tennesee got 20" arellis on her 06 v6 coupe.. looks nice. but im not fan of 20" rims. She hasnt complained about her acceleration slowin down but 18" are plenty big. 20" equal more expensive tires= waisted money that could be spent on other mods
I personally like the look of the 20' rims, but I've read that your ride quality suffers. For a show car, I would do it. However, for an everyday drive, I would stick with the 18', of course lowered a little bit.
When I had my V6, I swapped my 16" wheels for 17" and I could easily notice the loss on take off and acceleration.
On my GT, I went from 17" to 20" and once again could easily notice the loss on take off and acceleration. Keep in mind that in both cases the new tires were creating more friction. But in general the car feels much heavier when starting and stopping.
Don't forget this all means less MPG and more wear on the brakes.
You'll be fine putting 20" rims on. Also, when you ask a question like this (about 20" rims) you'll get a lot of people chiming in with their opinion - at the end of the day - do what you like and can afford to do.
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