Rolling Diameter on Quattro

[Kielan]

Just wanna confirm that running a 225/40/18 and a 245/40/18 will be ok? Based on my math it's a rolling diameter difference of 2.5%, it also helps that the new 225s I'm getting run a little big, so it's probably more like 2-2.2%. Will that be alright?

[stbk]

i had 1.2% of on my 4 motion system. they say that i wont take dmg of that little. so im guessing 2.2% wont be problem either.

[Tuck&Poke]

Just my 2 cents. The quattro system in the B series chassis Audi's is Torsen, meaning its a fully mechanical gear setup. While there is some tolerance built in for tire wear, its not designed to have any difference in rolling diameter, unlike the Haldex based systems in the R32, or the viscious systems in for example an AWD Porsche. If you can keep the rolling diameters the same, I would recommend it.

[stbk]

Just my 2 cents. The quattro system in the B series chassis Audi's is Torsen, meaning its a fully mechanical gear setup. While there is some tolerance built in for tire wear, its not designed to have any difference in rolling diameter, unlike the Haldex based systems in the R32, or the viscious systems in for example an AWD Porsche. If you can keep the rolling diameters the same, I would recommend it.

hm, maybe you are right sir. cause i had the Haldex system in my 4 motion.

[pDubs]

Just run a 235/40r18 all around. haha

[Kielan]

Doesn't even matter now. Got a set of 225/40s for cheap so I got all 4 hahah.