Are 20's a performance killer?

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07-03-2007, 04:28 PM

#11

06musgt

2nd Gear Member

Join Date: Jul 2006

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Posts: 328

RE: Are 20's a performance killer?

thats why i wanna keep my 17's because if theres a difference between 20's and 18's.theres gotta be a slight difference between the 18's and 17's wouldn't you think?

07-03-2007, 06:24 PM

#12

TrIpOd

3rd Gear Member

Join Date: Jun 2007

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Posts: 624

RE: Are 20's a performance killer?

Quote:

ORIGINAL: Black06GT40324

rotating mass hurts . . . and it changes your gear ratio . . .

LARGER RIMS DO NOT CHANGE YOUR GEAR RATIO!!!! only if the tires you purchase are a larger diameter than the stock wheels which the diameter is 27.2. the most common size for 20" rims is 255/35/20 which is a 27" diameter. thats not enough to change your gear ratio.

07-03-2007, 07:08 PM

#13

Dex

5th Gear Member

Join Date: Mar 2007

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Posts: 2,257

RE: Are 20's a performance killer?

hes right

07-03-2007, 10:22 PM

#14

Mustang3GT07

6th Gear Member

Join Date: Mar 2007

Location: Chicago, IL

Posts: 6,169

RE: Are 20's a performance killer?

They hurt your car alot!

07-03-2007, 10:30 PM

#15

PLstang

5th Gear Member

Join Date: May 2007

Location: N/A

Posts: 2,690

RE: Are 20's a performance killer?

I'm sorry I dont know much about the technical side of the issue, I just never cared for them on the S197's.

07-03-2007, 11:23 PM

#16

wozz

2nd Gear Member

Join Date: Nov 2006

Location: Manchester, UK

Posts: 346

RE: Are 20's a performance killer?

All depends on the wheels fitted. For example my friend lost 52lbs of weight on the wheels by changing from a 16" stock wheel adn tyre to a 17" wheel with semi slick tyres. Made quite a big difference and as rotating radius was identical speedo was spot on.

If you have chrome wheels chances are yes there hurting your performance. If you went with a light weight 20" set they could possibly be lighter than the stock 18's if you get some decent lightweight wheels.

07-04-2007, 12:48 AM

#17

FastLane034

3rd Gear Member

Join Date: Feb 2006

Location: Muskegon, MI

Posts: 538

RE: Are 20's a performance killer?

I HATE 20's on s197's.... People say "they really set off the car" yeah well I just think they look horrible. The ONLY 20 acceptable is a chrome or black bullitt, but still not even close to worth it for the performance loss.

07-04-2007, 01:43 AM

#18

brad281

4th Gear Member

Join Date: Mar 2007

Posts: 1,249

RE: Are 20's a performance killer?

20's kill performance. You can feel it the first time you drive the car. I really like how they look and that makes it up for me. I also have a vert whcih is also a performance killer in the extra weight. Ride is stiffer, but car does handle better with smaller and stiffer bfg sidewalls.

07-04-2007, 02:51 AM

#19

Treatz

2nd Gear Member

Join Date: Mar 2006

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Posts: 167

RE: Are 20's a performance killer?

the same can be said for a lighter wheel.
I myself was looking at some ultra light 18 and 19's which SHOULD weigh less then my stock 17's

www.tirerack.com has a nice set of ASA AR1's in 18' which look like the FR500 mustang wheels.
they weigh 23lb's per wheel on 18 x 8

|SIDEBAR| what do the Stock 17's on a GT weigh?