ted tcb Posted July 18, 2005 Report Share Posted July 18, 2005 I'm looking into switching the rubber from a 97 STS with a 99 STS. My 97 uses P225/60R16, while the 99 with older rubber has P235/60R16 ... dealer is willing to put my new rubber onto the 99 STS. Will the P225 fit the 99's stock rims? Also, I have four '97 original rims shorn with P225/60R16 snow tires ... come winter, can I put this tire/rim package onto the 99 STS? Thanks in advance. 1989 FWD Fleetwood, Silver 1995 STS Crimson Pearl on Black leather 1997 STS Diamond White 1999 STS Crimson Pearl 2001 STS Silver 2003 STS, Crimson Pearl Link to comment Share on other sites More sharing options...
johnnydone Posted July 18, 2005 Report Share Posted July 18, 2005 tire rack im pretty sure u can but check with tire rack Link to comment Share on other sites More sharing options...
Bob D Posted July 18, 2005 Report Share Posted July 18, 2005 No problems whatsoever. '93 STS.. opened, dropped, wide...fast. Link to comment Share on other sites More sharing options...
bigjayzway Posted July 19, 2005 Report Share Posted July 19, 2005 Absolutely, without a hitch! You will actually get better traction in the snow with a thinner tire! The 225 is a little thinner than the 235. They are both the same profile, so the only difference is in the width(minimal difference in hight) hight difference is so small you won't even notice it. Big Jay At last a topic I am a pro in...TIRES! Life is too short to grow up! Link to comment Share on other sites More sharing options...
ted tcb Posted July 19, 2005 Author Report Share Posted July 19, 2005 Thanks for the responses 1989 FWD Fleetwood, Silver 1995 STS Crimson Pearl on Black leather 1997 STS Diamond White 1999 STS Crimson Pearl 2001 STS Silver 2003 STS, Crimson Pearl Link to comment Share on other sites More sharing options...
JasonA Posted July 19, 2005 Report Share Posted July 19, 2005 You'll also see lower rolling resistance (less tread on the pavement), better fuel economy, and better overall performance (less weight). Jason(2001 STS, White Diamond) "When you turn your car on...does it return the favor?" Link to comment Share on other sites More sharing options...
KHE Posted July 19, 2005 Report Share Posted July 19, 2005 I think the speedometer will read higher than the actual speed as the 225-60 tire is smaller in circumference than the 235-60 tire. Kevin '93 Fleetwood Brougham '05 Deville '04 Deville 2013 Silverado Z71 Link to comment Share on other sites More sharing options...
Bill K Posted July 20, 2005 Report Share Posted July 20, 2005 Here is a site that will calculate the differences in size and what it does to your speedometer. http://www.1010tires.com/TireSizeCalculator.asp Link to comment Share on other sites More sharing options...
Bob D Posted July 20, 2005 Report Share Posted July 20, 2005 Your speedo will read 1.7% fast. Ie; 60 mph read on the speedometer will equal 59 mph actual road speed. '93 STS.. opened, dropped, wide...fast. Link to comment Share on other sites More sharing options...
bigjayzway Posted July 20, 2005 Report Share Posted July 20, 2005 You'll also see lower rolling resistance (less tread on the pavement), better fuel economy, and better overall performance (less weight). Jason, you are right, there will be a difference, but with one size it will be minimal. With running them in the winter, you won't be able to notice, as a matter of fact on snowy days, it will be worse. Resistance in cutting through the snow causes less mpg's. Big Jay Life is too short to grow up! Link to comment Share on other sites More sharing options...
JasonA Posted July 20, 2005 Report Share Posted July 20, 2005 Jason, you are right, there will be a difference, but with one size it will be minimal. With running them in the winter, you won't be able to notice, as a matter of fact on snowy days, it will be worse. Resistance in cutting through the snow causes less mpg's.Big Jay I don't understand how a thinner tire (however minimally) would cause MORE resistance cutting through snow. ?? Jason(2001 STS, White Diamond) "When you turn your car on...does it return the favor?" Link to comment Share on other sites More sharing options...
cardio-doc Posted July 20, 2005 Report Share Posted July 20, 2005 You'll also see lower rolling resistance (less tread on the pavement), better fuel economy, and better overall performance (less weight). What he said. Exactly. Only get the 235 tire if you want the 'fuller' look of it. (style issues) If that does not have value then DEFINITELY get the 225 tire. cheers, ~Doc --- Direct Performance on Ebay CaddyInfo.com Cadillac Conversations Blog Link to comment Share on other sites More sharing options...
bigjayzway Posted July 20, 2005 Report Share Posted July 20, 2005 I don't understand how a thinner tire (however minimally) would cause MORE resistance cutting through snow. ?? What I am saying, is it really won't make a difference.....The milage(minimal) that you could save by going down one tire size, will not make a differece, when you drive in snowy conditions. A dry smooth road that is free of anything is going to have less resistance than a road that is covered in snow, rain, slush, etc.... A bicycle tire has resistance cutting through snow....come on, I hope this was a joke? Big Jay Life is too short to grow up! Link to comment Share on other sites More sharing options...
JasonA Posted July 20, 2005 Report Share Posted July 20, 2005 I think we're agreeing, but on different terms. My point is that given the choice of a 235mm tread width or a 225mm tread width, the 225mm tire will offer less rolling resistance, and have less weight. Minimal though the difference may be, the difference is there. I thought your previous comment (on 20 Jul, above) was saying that the thinner tire would produce more resistance in snow than a thicker tire would, and I was asking why that would be (because it wouldn't). Now I know you were merely pointing out that you'll get poorer mileage driving in the snow than in the dry, which is true, all else being equal. Jason(2001 STS, White Diamond) "When you turn your car on...does it return the favor?" Link to comment Share on other sites More sharing options...
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