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      11-26-2018, 04:32 PM   #19
InspireSiR
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Drives: 2013 BMW M3 E92
Join Date: Oct 2005
Location: Los Angeles, CA

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GTS uses a 5mm spacer in the front. I'm thinking it has something to do with the 30mm stagger front to rear (255/285) compared to stock 245/265.

As far as tire sidewall height being shorter in the rear with 285/30, I'm not sure the car knows a difference as someone said previously. It's a very small percentage change from 265/35.
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