CobaltCpe

im really interested in purchasing these rims/tires on ebay. But im wondering what size tires i should get. I plan on dropping it with the ssc lowering springs that are a 1.5" front and 1.3" rear. Heres the link of the tires/rims on ebay. There adr rims.

http://cgi.ebay.com/ebaymotors/17-AD...88507134QQrdZ1

please help me out, thanks

I got a lt 07 black coupe with window tint and black projectors now.

yellowcobaltss05

go 21/45/17

CobaltCpe

thanks, mine are 4x100 lug pattern right for the stock hubcaps.

yellowcobaltss05

everyone that i have seen w/ the 2.2 cobalts that have 17" rims always go with the 21/45/17 tire size

CobaltCpe

what offset do i need. I see there is +40mm or +45mm on some of the rims im looking at.

yellowcobaltss05

im not sure about that. Someone else im sure will chime in

Listerman

im running 225/40/18 with 40mm offset and its pretty flush with the body. 45 may be a little out like very little

edit: pics in gallery may show how they sit. search Listerman

JMH

Try to match the "overall diameter" as closely as possible to stock, and avoid an expensive trip to the alignment shop for camber adjustments. Otherwise you'll end up with a contact patch the size of a gerbles' nuts, and your new" wide meats" will be blowing in the wind anyway. The sizes you quoted differ in O/S diameter by 14.75mm.......this could effect your lowering posibilities aswell. If you go wider......you will usually want to drop your aspect ratio to compensate. It maintains your final drive ratio aswell, otherwise you lose acceleration, have a f'ked-up speedometer and it stresses the drivetrain (clutch in particular) more than intended. Just do some math and save yourself some headaches. aspect ratio (40,45 series etc) is a precise % of the tires sidewall height vs. its width . ie: 205/45/17 (stock SS?) 45% of 205mm which equals 92.25mm sidewall height. Add this to 17 inch wheels (432mm) and you have an overall diameter of 524.25mm. This is the number you're shooting for regardless of the wheel/tire combinations you put together. Good luck.

DarkSergeant

^^ God damn, I guess the schools in Canada really are better.