Re: 1997 540I wheels on 1991 535i?? Works?

["coolguy" <bike0001@xxxxxxx>]

well, lets see:

your tires are 60% of 225 which gives 135.0 mm divided by 25.4 equals 5.31
inches. multiply by 2 for both ends and add 15 inches of rim diameter gives
25.63 inches.

the combo you want to put on has these dimensions:

55% of 225 is 123.75 mm divided by 25.4 equals 4.87 inches. multiply by 2
for both ends of wheel and add you 16 inches of rim diameter gives an
overall diameter of 25.74inches.

pirelli says +/- 1% is or something like that in deviation. so lets see:
(25.74 - 25.63) / 25.63 = 0.0043 and multiply by 100 gives a deviation of
0.43%.

That looks like a good match to me. Concerning speed/odo meter its, a near
perfect match. It shouldn't rub unless the wheels (rims) aren't displaced
the same from the bolt site -- maybe others on the digest might want to
comment on offset or dish? stuff.

hope this helps.

aaron young
'87 325
'97 M3/4 - soon to be replaced by new E39 528 touring.  :-) and :-(


- ----- Original Message -----
From: Jon Posner <jon@domain.elided>
To: <bmw-digest@domain.elided>
Sent: Wednesday, July 21, 1999 11:05 PM
Subject: 1997 540I wheels on 1991 535i?? Works?


> Does anyone know, offhand, if wheels from a 1997 540i, P225/55 16", will
> fit on my 1991 535i (currently 225/60 15")?  I really have very little
> understanding of these matters and could really use a little education
> here.
>
> Will it be a straight swap?  Would the appropriate tires be 225/55 16  or
> 225/50 16 so as to keep speed/odometer readings the same and eliminate any
> possibility of rubbing/ other problems?
>
> Help.
>
> Jon Posner
> '91 535i
>
>
>
>

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