Stretched Tyres

[haste33]

i got a sprinter with 15'x9.5 -22 offset with 205,50,15 and 15x 9 - 22 offset 195,50,15 on it u get less side wall flex when drifting anr a stiffer ride

[D_I_F]

I have 235's on my 9inch rims.. they suck!

[adam-__-]

You got any pics of you car/wheels haste33?

[silver gts-t]

i do it for cost and so the wheels sit better in the guards

ive got 205's on a 8.5" on the front and 225's on a 9.5" for the rear.

looks depend on the tyre also, previously i had a set of dunlops that were 235 on the rear and they looked like they were stretching more than my current 225's

[Russman]

i do it for cost and so the wheels sit better in the guards

ive got 205's on a 8.5" on the front and 225's on a 9.5" for the rear.

looks depend on the tyre also, previously i had a set of dunlops that were 235 on the rear and they looked like they were stretching more than my current 225's

I've also had the same thing with dunlop and bridgestone 235/45/17's being quite different on my 9in rim. The Bridgys look stretched and the dunlop sat square.

I like the look of it and the less sidewall flex.

[FOG35]

I always had 235's on 10.5" rims. Same reason as said before, any bigger would rub.

[ali-turko]

iv had 265s on 12" wide wheels with no problems

[markimak]

seen 205 on 10inch.. lol

im planning to use 195-205 on the 8 i have.. and running 225 contisport 2

[scathing]

from a grip standpoint, your getting less tread on the road though

Not exactly true. The tyre width does not determine the size of the contact patch. All else being equal, a 225 tyre will have the same surface area touching the ground as a 245 width tyre.

[Russman]

Not exactly true. The tyre width does not determine the size of the contact patch. All else being equal, a 225 tyre will have the same surface area touching the ground as a 245 width tyre.

Huh? Am I missing something? skinny tyre=less surface contact, fat tyre=more surface contact?

[Guilt-Toy]

I think he is confused with the profile of the tyre

[adam-__-]

I always had 235's on 10.5" rims. Same reason as said before, any bigger would rub.

That's pretty good fitment mate.

Not exactly true. The tyre width does not determine the size of the contact patch. All else being equal, a 225 tyre will have the same surface area touching the ground as a 245 width tyre.

Any chance you can explain?

[dodgybrooks]

With your 14x10 Longchamps, you've dumped it till sparks off man holes and with as much camber as you can dial in the tyre still hits the guard, you need to stretch. This is where the fad all started ladies and gentlemen.

And here it is, 195/60/14 on 10inch.

[adam-__-]

Shit, that's pretty crazy. I wonder what the cops would think if they saw that.

[Russman]

Looks like its gunna pop off the bead just sitting there!

[Wink]

That is the most stretched tyre I've ever seen. Crazy.

[scathing]

Any chance you can explain?

I had another read of the post, and in the context it was posted I'm probably wrong. With an ultra-stretched sidewall, that doesn't flex as much as one with a "proper" fitment, the contact patch will be smaller.

Which is probably why didn't reply to his post the first time......

But if you run two tyres of different sizes on rims that they're "suited" for (like say a 215 width tyre vs a 245 width tyre on a 7.5" wide rim) then the difference in contact patch between them is minimal.

[Mr Eps]

right australian manufacturers know everything...

ahhhh this is why in germany cars such as porsche and mercedes come with stretched tyres from the factory....

that's right, it's PORSCHE that know nothing., ah keyboard warriors were right the whole time, should've known...

[Rolls]

Any chance you can explain?

"Imagine driving on to a glass road and looking up underneath your tyres. This is the example contact patch (in red) for the situation I explained above. The narrower tyre has a longer, thinner contact patch. The fatter tyre has a shorter, wider contact patch, but the area is the same on both."

Because you now have more space the weight is less per cm so the contact patch decreases. Of course all sorts of factors change this, eg tyre pressure, how much its stretched etc.

Stolen from http://www.chris-longhurst.com/carbibles/tyre_bible_pg2.html

ahhhh this is why in germany cars such as porsche and mercedes come with stretched tyres from the factory....

that's right, it's PORSCHE that know nothing., ah keyboard warriors were right the whole time, should've known...

They might stretch them but its not ridiculous stretch eg a 195 on a 9.5" rim.

Edited August 18, 2007 by Rolls

[adam-__-]

Ah I see what you mean. You learn something new everyday.

Cheers