tire upsized

tire upsized

by Ernst

I have an old BMW 540i with 235/45x17 tires on 8J wheels.

I'm considering a purchase of a set of winter tires at a very good price but they are 225/60x17.
The increased diameter will affect the speedometer but that's not a concern for me.
I'm more concerned with
i) clearance, esp in the front (possible rubbing when turning)
ii) ABS?
iii) handling

Larger Sized Tires:

As you might already know this swap that you propose is not one that I, or most tire technicians would recommend: largely due to the increase in overall diameter of the tire.

Yes, rubbing is a major concern and frankly I would say that the only way to know, for sure, if this will work on your vehicle is to do a test mounting in the location where you have the least amount of available space and see what happens.

If, after you test you find there is no rubbing and you are prepared to put up with the speedometer error, then you could go ahead with the swap. You may lose a bit of power on your drive wheels but proper handling control shouldn't be dangerously affected.


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