Quote:
Originally Posted by LoveZ4
I'm so confused, I need to replace 2 rear wheels due to cracks, but considering putting aftermarket wheels on the Z4, as it's more cost effective than original BMW wheels. However, my tyres are runflats and staggered. I'm getting conflicting information and need to know if my runflats will be compatible with the aftermarket wheels. Changing to regular tyres on a Z4 that has minimal boot space and 2 tyre sizes, is not an option for me now. Would I have to replace these wheels with the original BMW wheels? ��
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The short answer is NO, you do not need original BMW wheels, any aftermarket wheel will work with RFT's. Just need to be sure the diameter and width of the new wheels are the same or close to what you have now if you are going to use the tires off your existing OEM wheels to transfer to the new wheels.
If you go the new wheels route, you might consider an offset that give it a wider stance? Or you can use wheel spacers as I have on my stock 18" style 325 wheels. I went with 15mm fronts and 20mm rears and like the increased stance with these additions per this thread:
https://e89.zpost.com/forums/showthread.php?t=1997777
Stock wheels specs are as follows, addition of spacers effectively only change the offset:
Front: 8Jx18 ET+29 Offset. With the addition of the 15mm spacers, the new effective offset is ET+14
Rear: 8.5Jx18 ET40. With the addition of the 15mm spacers, the new effective offset is ET+20
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Current: G01 X3 M40i (Carbon Black / Black Vernasca, Blue stitch Leather), E89 Z4 35i (Alpine White / Kansas beige leather), Ram 1500 Limited 4x4 (Black / Black leather), 2004 Honda Goldwing - Previously owned BMW's: E36 M3, E46 330i, E46 M3, F25 X3 3.5i M Sport, G12 750ix M Sport, F32 435i xdrive M Sport.