bigjayzway Posted October 19, 2006 Report Share Posted October 19, 2006 I need a set of winter rims and tires for my 98 STS. Will 15" be ok? I can get a smokin deal on a set from a Pontiac, but they are only 15". They have 205/70/15 on them right now. Jay Life is too short to grow up! Link to comment Share on other sites More sharing options...
Ed Hall Posted October 19, 2006 Report Share Posted October 19, 2006 Should work just fine as long as the bolt pattern is correct. With the narrower 205 tread width, you'll also have better traction in snow. Link to comment Share on other sites More sharing options...
bigjayzway Posted October 19, 2006 Author Report Share Posted October 19, 2006 I am pretty sure the bolt patterns are the same? I am not 100%. They look like they are from a grand prix, and I am sure they are 115mm. Jay 15" wheels. This is the link to them. Doesn't say if they are from a Grand Prix. Says 5 x 100, but I have not seen that size for Pontiac before. Jay Life is too short to grow up! Link to comment Share on other sites More sharing options...
Cadillac Jim Posted October 19, 2006 Report Share Posted October 19, 2006 I wouldn't bet on a Pontiac bolt hole pattern being the same. In the old days, Pontiac had a bolt circle diameter that was a little different from anybody else, although I don't believe that this distinction survived the bass-o-matic scrambling of GM makes in the 1980's. A quick way to check is to look at the wheel listings on The Tire Rack's web site. Look for wheels that will fit your car, and see if any Pontiacs are also listed for that wheel. It does seem like a crime to put smaller wheels on an STS. The Touring package includes a handling upgrade that you will basically throw away with smaller, narrower wheels. Also, you probably won't match the rolling radius, which will effectively give you a lower final drive gear ratio and throw off your speedometer. I wouldn't trust it at speeds over about 80 mph on 15" wheels. -- Click Here for CaddyInfo page on "How To" Read Your OBD Codes-- Click Here for my personal page to download my OBD code list as an Excel file, plus other Cadillac data -- See my CaddyInfo car blogs: 2011 CTS-V, 1997 ETC Yes, I was Jims_97_ETC before I changed cars. Link to comment Share on other sites More sharing options...
Dadillac Posted October 19, 2006 Report Share Posted October 19, 2006 The bolt patterm will be fine. I am not sure that there is enough room for the calipers though. It is pretty tight with the 16's. Don "Modern warriors saddle iron horses of chrome." Link to comment Share on other sites More sharing options...
Bill K Posted October 19, 2006 Report Share Posted October 19, 2006 Sounds like they could work and the size isnt too much different. http://www.1010tires.com/TireSizeCalculato...p?action=submit Link to comment Share on other sites More sharing options...
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