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      06-19-2010, 11:13 AM   #6
scollins
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Drives: 2024 X3 M40i
Join Date: May 2007
Location: Renton, WA

iTrader: (3)

I've done a little digging, and I think this may be your problem:

18" Z4 E89 wheel specs:
Front: 8x18 ET 29
Rear: 8.5x18 ET 40
From here: Post by Ramius

19" Style 313's have specs:
Front: 8x19 ET 37
Rear: 9x19 ET 39
From here: For Sale post from United BMW

If we plug those specs into our handy calculator, you get:
Front: 8mm less clearance on the strut side. Your tire is also 10mm wider, or 5mm wider on each side. That may cut your strut clearance by 13mm from stock. You might be rubbing in the front.

Rear: 15mm less clearance on the inside! And your tire is also taller by 1/4" and 10mm wider overall (5mm per side). So that cuts your potential clearance on the inside down by 20mm. You might not have that much room to give, especially when going up to a larger wheel and tire diameter.

I'd take off your wheels and inspect the inside edges for any wear. You may want to chalk the tire and wheels and then drive around some and see if it wears off.
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Scott
2024 G01 X3 M40i, Brooklyn Grey Metallic /// 2015 F15 X5 35i, Space Gray Metallic, 99K miles /// 2013 F30 320xi, Mojave Metallic, 112k miles
2019 Ford F450 STX, Oxford White
2013 Ducati Multistrada Touring S, Red
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