Can some of you tell me why so many people choose 19" rims over 20"? It seems that even tires are cheaper for the 20" rims, plus the sidewall is the same height so i would assume the ride is the same quality. I want to get 20" to fill in the gap more (the car will not get lowered), any reason why i shouldn’t?

I dont mind the weight factor, im not gonna race, is there anything else im missing?

 

I got 19 cause the biggest they got is 19 for the rim i wanted.

 

Depends on what stock wheel size your car came with before but if you're going from a 17" or 18" stock size with stock suspension, moving up to 19" or 20" will not reduce the wheel gap. The difference in overall tire height will not change that much if you get the correct size tires for either 19" or 20" wheels but from appearance, getting larger size wheels looks like your wheel gap will increase due to lower profile tires. If you want to basically change your wheel gap, you will be force to lower your car, not increase wheel size.

 

The 20" wheels will fill in more space. I used a tire calculator, and here are the results:

Stock : 225/50/17
Sidewall: 4.43
Width: 8.86
Diameter: 25.86
Cirmum: 81.24
Revs: 804.33

Aftermarket: 245/35/20
Sidewall: 3.38
Width: 9.65
Diameter: 26.75
Cirmum: 84.04
Revs: 777.57

If speedometer reads 65, you are going 67.24.

Would 20"s void my warranty?

 

Anyone? This is important..im planning on buying wheels tomorrow.

 

If you're going strictly for looks, 20's are the way to go. If performance is your goal, get some lightweight 19's. Don't for a minute think 19's and 20's have the same sidewall, however. With an inch difference in wheel diameter, basic math tells you the 20's have a half inch less sidewall when sized appropriately.

 

Looks like you have done your homework. I have been doing the same calculating and have come up with 245/35-20 F, and 265/35-20 R, to keep the same .5 difference in tire height from front to rear (recommended for the ABS to function properly). With this setup you will reduce the space from your wheel to the fender by approximately .5. With a fender diameter of approximately 30 inches, as tire height in the 27 inch range would give you 1.5 inches of seperation from tire to fender, and would look the best. I am actually also considering 255/35-20 F, and 275/35-20 R. This 20mm difference in width front to rear means I will need to look for a wheel that offers 2 widths that are 1 inch differnce, like 8.5 and 9.5, or 9 and 10.

 

+1...

 

so for 20's the right tires are 245/35/20 and 265/335/20? i thought the right setup for 20's was 245/35/20 and 275/35/20? so this means with the 275's my ABS wont function properly?

 

Your tires will depend on the width of your rims and the look you're after. Some people like fat rims and fat tires. Others like fat rims but stretched tires to prevent rubbing if lowered. There are many variables in determining tire sizes. Maybe you can post specs of your rims and someone can guide you better.

 

Weight of the wheels really depends on the actual wheel...for example there are 20 inch wheels that weigh less than some 18 inch wheels.

But the killer is rotational mass, can't defy physics. The larger the wheel, the more force it takes to turn them. 20's decrease your acceleration and braking more than 19's.

Personally, I think 19's are the best wheel thats a compromise between looks and performance.

20 inch tires are cheaper because they are more mass produced, but as time goes by 19 inch tires are getting cheaper because they are also becoming more and more mass produced.

 

get 20's........they look a lot better

 

Yep, 19s all the way.