Fave RS4 Pic

[okkim]

Why have are you running different profiles front to back and have you experinced these problems?

You "have to" use different profiles if the tires width are different. Otherwise the center differential gets hurt because the diameter if the tire is different.

[dace]

You are right Mike it was.

On another note............... Stuffy London Rent Boys!

LOL Dave. Thought you'd be happy we pi$$ed off the scousers with a fine 94th minute equaliser. The enemy of my enemy is my friend and all that.

Lol Nice one, I was going to keep my gun powder dry, however could not resist....

[Jhcolling]

Why have are you running different profiles front to back and have you experinced these problems?

You "have to" use different profiles if the tires width are different. Otherwise the center differential gets hurt because the diameter if the tire is different.

I'm running 8.8 front and 9.5 rear, what profiles and tire widths should i have?

[Jarv]

You are right Mike it was.

On another note............... Stuffy London Rent Boys!

LOL Dave. Thought you'd be happy we pi$$ed off the scousers with a fine 94th minute equaliser. The enemy of my enemy is my friend and all that.

Lol Nice one, I was going to keep my gun powder dry, however could not resist....

Just watch your backs on Saturday, with all them rent boys running around and all.

[rsmonkey918]

The aspect ratio of the tyre ie. 30,35,40,45 etc is the percentage of the width of the tyre, which affects the rolling radius, so for instance off the top of my head a 17" 215/40 would roughly approximate to a 18" 225/35- gone up a width and down an aspect ratio- there are various permutations- some people like a 'square' sidewall profile, I personally like a more rounded look so may go down a width but keep the aspect ratio the same for a slightly 'stretched ' look. Some manufacturers build in some roundness to the shoulder anyway. One thing to bear in mind is that the lower the aspect ratio, the thicker the sidewall cross-section and the more rigid or stiff it is with obvious ride/handling/comfort issues on top of the manufacturers intent for that kind of tyre with regards to compound mixes etc. Also need to check pressures much more regularly as the sidewalls deform to a lesser extent when low on pressure masking deflation problems.

[Jhcolling]

The aspect ratio of the tyre ie. 30,35,40,45 etc is the percentage of the width of the tyre, which affects the rolling radius, so for instance off the top of my head a 17" 215/40 would roughly approximate to a 18" 225/35- gone up a width and down an aspect ratio- there are various permutations- some people like a 'square' sidewall profile, I personally like a more rounded look so may go down a width but keep the aspect ratio the same for a slightly 'stretched ' look. Some manufacturers build in some roundness to the shoulder anyway. One thing to bear in mind is that the lower the aspect ratio, the thicker the sidewall cross-section and the more rigid or stiff it is with obvious ride/handling/comfort issues on top of the manufacturers intent for that kind of tyre with regards to compound mixes etc. Also need to check pressures much more regularly as the sidewalls deform to a lesser extent when low on pressure masking deflation problems.

So if I have 255/35 front I should put 265/30 at the rear? I must admit I'm finding it difficult to understand "why" this should be so.

[rsmonkey918]

Well you seem to have got the idea ok! If you go for a wider tyre you will need to drop an aspect ratio to maintain the rolling radius. Good idea is to visit a friendly upmarket tyre centre and ask to look at the various sizes/widths/ratio and profiles of various tyres. Stand a 255/35/19" next to a 265/30/19" and see the relative sizes of each. Other considerations are compound- can't be sure but if the ASC is really sensitive given the power of the RS4 it may even detect very small changes in grip between different manufactures/compounds.

[Devil]

my favourit pics of my RS