I think you've got that the wrong way. I'm sure the profile should be 45 on
the 8" rims, and 40 on the 9" rims.
My rear wheels is +41, I can't
If you don't know you should certainly check. Incorrect offsets can really
compromise the handling of a car. Especially with front wheels. It could be
the cause of the change in the steering feel.
AFAIK, all E36's have a 35mm positive offset front and rear. On the Z3 the
offset is 41mm, so although the wheels from a Z3 will physically fit on an
E36, they are bound to affect the steering.
Ideally the wheel offset should be the same on front wheels as the offset of
the wheel mounting face on the hub, so the steering geometry stays the same.
AFAIK the offset of a wheel allows the centreline of the wheels to be in the
correct position relative to the offset of the hub wheel mounting face.
IOW, no matter how wide the rims are, providing the offset is the same as
that of the hubs, their c/line stays the same. With rear wheels it's not so
important, but a different offset on front wheels must affect the steering,
as in effect you are altering the steering geometry. Whether the alteration
is acceptable, is something else.
As the wheel gets wider one starts to run out of room one side or the
other so there is usually some adjustment to the offset.
For an E36 the following are listed as original fitment...
6X15 offset of 42
7X15 offset of 47
7X16 offset of 46
7.5x17 offset of 41
If you got them from a Z3, they are not X5 wheels.
The Z3 tires and rims should be interchangeable with the other 3 Series
cars. The stagger, in and of itself, is not necessarily a problem, and the
stagger numbers you cite are normal stagger for the 3 Series cars.
Thanks all to your wonderful insights, they are all valid. Yeah, I
think the new offset should be acceptable, also it should have a little
effect on steering.
I think I'm getting used to the noise. I seem to hear it more when my
windows are closed as there is no outside noise to mask it.
I also looked closely on the stretch of asphalt road I take, and it's
unbelievably wobbled. The lanes have raised bumps on the sides perhaps
either it was pushed up or the usual tire track deepened. These are at
minimum an inch high. I think the switch to wider tires has made these
bumps more apparent. I needed to be more alert on steering when
On a flat road the effect of wider tyres is not usually very noticeable.
On an uneven road at times, the weight of the car might be only on the
outside or inside edge of the tyres. That alters the self centreing effect
of the steering, tending to bias it one way or the other, resulting in the
tramlining effect you mentioned in an earlier post.
That's the spirit. High Performance attention for a performance car with
performance tires. Me thinks you're starting to get Performance Driving.
Seriously, I think you're gonna like the new tires in the long run. If I was
doing it, I think I would NOT have done the stagger, that way I'd have more
options with rotating and such. Having said that, I do not generally rotate
my tires. I had a brand spanking new spare tire in the trunk that was more
than 10 years old. Now, I have a brand spanking new spare tire that is 2
years old. But, my spare is the same size as all 4 tires on the ground, so I
can have a flat on any corner and my spare will do the trick ...
If you're into performance rotating tyres isn't generally done as the
wear pattern on the front usually doesn't give good results when placed
on the rear.
As long as you have a spare that actualyl fits on all four corners it
doesn't really matter what the main road wheels are.
Hahaha. It's crazy true. First you get nice rims and tires. Next you're
thinking of upgrading exhaust and intake...Thanks!
BTW, will a stock M3 exhaust give me some benefit?
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