SUSPENSION qUESTION.
SUSPENSION qUESTION.
i new to this I have always messed with muscle cars over the years. I got a a 09 cobalt lt and im wanting to lower it, can i still use the stock shocks because i hate to replace them since the car only has 900 miles on it. I am looking at th eibach pro kit so i was just wanting some points of views on this.
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From: Fayetteville/Linden, NC/Myrtle Beach, SC
No, those blacks for sure are much larger. Mine are much larger diameter too 245/45-17 stock is 195/65-15
example with my aftermarket rims and stockers.
to get tire size multiply the width(245) times the aspect ratio(45) times 2 plus the height of the rims(17)
oh and for the In conversion there are 254mm in 1in.
245 X .45 X 2 = 220.5 / 25.4 = 8.68 + 17 = 25.68 inches.
195 x .65 X 2 = 253.5 / 25.4 = 9.98 + 15 = 24.98 inches.
Rotation distance(one rotation of 360* per wheel)
overall height times pi(3.14)
17's: 80.63 inches
15's: 78.43 inches
Rotations per mile(how many rotations a wheel does per mile)
5280ft X 12in = 63360in/mile
63360 / rotation distance
17's: 785.81
15's: 807.85
example with my aftermarket rims and stockers.
to get tire size multiply the width(245) times the aspect ratio(45) times 2 plus the height of the rims(17)
oh and for the In conversion there are 254mm in 1in.
245 X .45 X 2 = 220.5 / 25.4 = 8.68 + 17 = 25.68 inches.
195 x .65 X 2 = 253.5 / 25.4 = 9.98 + 15 = 24.98 inches.
Rotation distance(one rotation of 360* per wheel)
overall height times pi(3.14)
17's: 80.63 inches
15's: 78.43 inches
Rotations per mile(how many rotations a wheel does per mile)
5280ft X 12in = 63360in/mile
63360 / rotation distance
17's: 785.81
15's: 807.85
Last edited by tru2nrtt777; Aug 26, 2009 at 02:00 PM.
Stock VS Pedders on SS/SC w/ 245/40-18 This immediately after install. only drove 100ft to outside.Pics taken less than 1hr apart. Car sits high in back because I have no interior behind driver seat, and nothing in trunk except battery(a lighter than stock one at that)
Stock: Frt fender to ground 26 3/4" RR fender to ground 28 1/2"

Pedders: Frt fender to ground 26"(actually just under 26) RR fender to ground 27 1/2"

So drop = 3/4" front 1" rear.
Sorry for pics quality, hard to photograph yellow car with black wheels in bright sunlight with a black berry.
Stock: Frt fender to ground 26 3/4" RR fender to ground 28 1/2"

Pedders: Frt fender to ground 26"(actually just under 26) RR fender to ground 27 1/2"

So drop = 3/4" front 1" rear.
Sorry for pics quality, hard to photograph yellow car with black wheels in bright sunlight with a black berry.





