miff13

Hi,

I've got 18" P1 alloys on my classic and they are rubbing on the strut spring cups on the inside of the rear wheel, they are only just touching and don't appear to be doing any damage but obviously I don't want to risk any damage being caused. I've been told on here that I could modify the strut spring cups but I wouldn't know where to start and am very reluctant to start hitting the suspension with a hammer!

The wheels have 225/40 pirelli tyres on, and I'm fairly certain that if I put 215/40 tyres on the rear they will no longer rub. Can I have different width tyres front and rear? will it affect handling in any way? If I can't get 215/40 for the rear could I use 225/40 on the front and 215/35 on the rear?

The other thing is I can't seem to find the same brand of pirellis (on the web anyway). I assume different brands of tyre front and rear is a definite no no?

Any advice appreciated.

Cheers

Matt

Paul666

Matt,
Don't do it! Different size tyres will have a different rolling radius and that will damage your drivetrain. That is why they say you should rotate your tyres, front to back, so you get even wear and the same radius.

You can have 225/35/18 or 215/35/18 with P1s on a Classic (225's with the ET53 offset) or so I am told, not tried it yet but will be doing shortly.

Thanks,
Paul.

miff13

Cheers Paul,

Just did a search on the subject, should have done that first, sorry guys!

Didn't want to put new tyres on all round, as the tyres are all fairly new, still would prefer Eagle F1's so now I guess I've got a good excuse.

Thanks

richiewong

As mentioned the rolling circumference will be different and maybe enough to cause diff wind up.

Classics should ideally run 215/35/18 or 225/35/18

225/40/18 is a newage tyre size really.

wrx_yank

all tires should be same brand, size width and wear grade...

if you get a flat, and you have more than a few thousand miles on the set of 4.... you need to replace all 4,

says pg. 11-34 in your owners manual... on a newage.

Mark'sWRX

What is meant by diff wind up? Is the diff thinking you are driving round a sharp bend all the time?

How much damage does this do, because I had to replace a punctured tyre with a new one, but am able to get an identical part worn next week. I didn't want to chuck away 3 half worn tyres for the sake of a week.

I've been driving very gently (very boring) hoping this will help the diff, but is my saving a couple of hundred quid now going to cost more later...?