The oversteer/understeer thread got me thinking, rubber on the road?

[Anthony (M5 in Calgary)]

will make you understeer more as well, wow i never knew a thread i started could make people think lol.

Another thing i have heard is that wide tires are more sensitive to chamber change than norrower ones (in terms of grip), which may mean you get more uneven wear, as the 525i suspension wasn't designed for monster tyres although that is not from experience its a reasonable guess from what i know. personally i think the extra grip is not worth the cost or the loss of balance (ie having a more understeering car). sure if you have 300+ hp you might need that extra grip in the rear so you can use the throttle whilst going around a corner, but i don't think in a 525i you need all that extra tyre

Even with 300+ hp you don't need them. I run 17 x 8.5" on all 4 with 235/45R17Y. Yes, it can be a bit tail happy (but controllable) under high throttle in corners, but is well balanced otherwise. You'd need to be well over 300hp to worry about needing the extra traction and the handling/wear/cost tradeoff is a big factor to consider. That and you cannot rotate tires front to rear which will add to your running cost...

[Marshy]

Well, in the dry, you'll probably never unstick the back end

Put it this way: I've got the standard 225 15s on my 540i and I don't want wider rubber. I mean... where's the fun in that?

(Yeah, I know, probably not a totally helpful post. Hey ho, it's Friday night, etc etc.)

(Edit: When I wrote this, there were three posts followed by the quick reply box. Having posted the message, the thread's at over a page already. Colour me confused...)

[hakwuzhere]

(still Paging Jon!)

[Paul in NZ]

235 mm wide is more than a 535 with lsd needs

[rob101]

the 17x8.5's are the m5 throwing star wheels size(see sig picture)? i am confused as i thought my 235s (off e34 in sig picture) were on 8"
I am looking at 16" s for my car (e28 that is) but they all are 8" wide now i wanted to put only 225 and 215 (to counter suicidal e28 oversteer tendencies 225 on the rear of course)on them because my e28 definetely doesn't need 235s, 8" wide rims are the right size to take 225s and 215s? (225 r16/55's that is)

Even with 300+ hp you don't need them. I run 17 x 8.5" on all 4 with 235/45R17Y. Yes, it can be a bit tail happy (but controllable) under high throttle in corners, but is well balanced otherwise. You'd need to be well over 300hp to worry about needing the extra traction and the handling/wear/cost tradeoff is a big factor to consider. That and you cannot rotate tires front to rear which will add to your running cost...

[Anthony (M5 in Calgary)]

the 17x8.5's are the m5 throwing star wheels size(see sig picture)? i am confused as i thought my 235s (off e34 in sig picture) were on 8"
I am looking at 16" s for my car (e28 that is) but they all are 8" wide now i wanted to put only 225 and 215 (to counter suicidal e28 oversteer tendencies 225 on the rear of course)on them because my e28 definetely doesn't need 235s, 8" wide rims are the right size to take 225s and 215s? (225 r16/55's that is)

I use my M-Tech wheels for winter. Summer tires on AC Schnitzer 17 x8.5 ET13: