Is a 245 tire on a 71/2" rim a real no no or just not ideal??
02-26-2006, 04:46 AM
#2
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Dont do it...
I had 245/45 on an 8" rim and it sucked *** the car felt real chunky and the tires always made noise , my suspension blew faster then usual. Now I switched to 235/40 and it made a huge difference.
02-26-2006, 04:57 AM
#3
Please don't........>>
Unless you want your car to handle like crap. 245's call for a minimum 8" rim width. If you place vanity above safety and your car handling right than go right ahead...
"A rim that is too narrow in relation to the tyre width will allow the tyre to distort excessively sideways under fast cornering (sidewall roll). On the other hand, unduly wide rims on an ordinary car (stretched) tend to give rather a harsh ride because the sidewalls have not got enough curvature to make them flex over bumps and potholes."<ul><li><a href="http://www.chris-longhurst.com/carbibles/tyre_bible.html">Get smart....Read this</a></li></ul>
"A rim that is too narrow in relation to the tyre width will allow the tyre to distort excessively sideways under fast cornering (sidewall roll). On the other hand, unduly wide rims on an ordinary car (stretched) tend to give rather a harsh ride because the sidewalls have not got enough curvature to make them flex over bumps and potholes."<ul><li><a href="http://www.chris-longhurst.com/carbibles/tyre_bible.html">Get smart....Read this</a></li></ul>
02-26-2006, 05:43 AM
#4
Well, since I'm responsible for this thread getting started in the first place...
I did some searching and found that Dunlops are wider than Michelins in the 225/45/17 size etc, etc. Does anybody else know width specs on other tires? The standard 225mm is 8 3/4 inches, and my Avons are approximately 8 1/2 so how much more width will actually fit on the stock 7 1/2 inch fat fives?
Just so you know, I'm a little light in the wallet at the moment and need tires anyway, so I'm trying to get a little wider tire for looks only without changing too much of the stock suspension geometry.
In other words, I don't want to change the overall rolling diameter more than 3%, and I only want to use spacers as a last resort.
Any input would be appreciated.
Just so you know, I'm a little light in the wallet at the moment and need tires anyway, so I'm trying to get a little wider tire for looks only without changing too much of the stock suspension geometry.
In other words, I don't want to change the overall rolling diameter more than 3%, and I only want to use spacers as a last resort.
Any input would be appreciated.
02-26-2006, 10:02 AM
#7
Specifically, what I want to know is this:
if 225mm equals 8.75 inches
and my tires are 8.5 inches
which brands are actually 8.75 inches wide
and are there any brands that are 8.75+ in a 225 size?
Thanks again.
and my tires are 8.5 inches
which brands are actually 8.75 inches wide
and are there any brands that are 8.75+ in a 225 size?
Thanks again.
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02-26-2006, 10:22 AM
#8
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Here's something, I did this today, since it was bothering me and I wanted to talk about it.
<img src="http://pictureposter.audiworld.com/90421/pzeroms.jpg">
<img src="http://pictureposter.audiworld.com/90421/potenzaso3.jpg">
The first picture is from my 225/45-17 Pirelli PZero M&S, as you can see from teh picture the tread is 7.75" wide. The second picture is my Bridgestone Potenza SO-3's in 225/40-18 that I just got last weekend. These measure a tread width of 8.5". The casing on the Pirelli's is only maybe 1/4" narrower, but there is an enormous difference between the two tires.
<img src="http://pictureposter.audiworld.com/90421/potenzaso3.jpg">
The first picture is from my 225/45-17 Pirelli PZero M&S, as you can see from teh picture the tread is 7.75" wide. The second picture is my Bridgestone Potenza SO-3's in 225/40-18 that I just got last weekend. These measure a tread width of 8.5". The casing on the Pirelli's is only maybe 1/4" narrower, but there is an enormous difference between the two tires.
02-26-2006, 11:47 AM
#10
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Yes, but I was measureing the tread width, not the casing width, and 3/4" is substantial.
I know the casing width will vary, especially since my 17's are a 17x7 and the 18's are an 18x8. But the part of the tire that is designed to touch the road varies from 7.75" to 8.5". I saw the same kind of thing when I went from 195 michelins to 195 Dunlops with my Scirocco many moons ago. The dunlops tread was 15mm wider than the michelins, for the same "size" tire.