[Joe240]

Factory specs below:

Bolt pattern: 5x112
Center Bore: 66.6mm
Bolt: M14 x 1.25
Torque: 140nm (103 ft lbs)

Factory 18s:
8"x18"et20
9"x18"et28
225/45 front tire
255/40 rear tire

Factory 19s:
9"x19"et32
10"x19"et40
255/35 front tire
275/35 rear tire



Here are some wheel options that were pulled from Tire Rack (TR) and 1010tires. Both have been reliable in the past for aftermarket wheels that fit on stock suspension without any modifications:

FRONT:
9et35 - 3mm closer to strut, 3mm further from fender (TR)
9et30 - 2mm from strut, 2mm closer to fender (1010tires)
9et25 - 7mm from strut, 7mm closer to fender (1010tires & TR)
9et20 - 12mm from strut, 12mm closer to fender (1010tires)
9.5et30 - 4.3mm closer to strut, 8.3mm closer to fender (TR)
9.5et25 - .7mm from strut, 13.4mm closer to fender (TR)
9.5et26 - .3mm closer to strut, 12.4mm closer to fender (2018 m5 19" wheel)

REAR:
10.5et30 3.7mm from strut, 16.4mm closer to fender (1010tires)
10.5et42 8.3mm closer to strut, 4.3mm closer to fender (TR)
10.5et38 4.3mm closer to strut, 8.3mm closer to fender (TR)
10.5et35 1.3mm closer to strut, 11.4mm closer to fender (TR)
10.5et28 5.7mm from strut, 18.4mm closer to fender (2018 m5 19" wheel)

The M5 19" wheels should theoretically fit since they fall within the ranges confirmed by TR and 1010tires (with the exception of the rear 10.5" which is only off by 2mm from a confirmed fit).


If you're looking for more grip, then MPS4S are the best out there without going streetable autocross/track tires.
275/30ZR19 MPS4S Recommend 9.5" wheel ($312.99)
295/30ZR19 MPS4S Recommend 10.5" wheel ($349.99)
305/30ZR19 MPS4S Recommend 11" wheels, but the mounting range starts at 10.5" ($377.99)

Yes, the 275/30 and 295/30 are smaller overall diameter than the factory 255/275, but only marginally and would cause a speedo error of ~2%, or .6mph (speedo reads 30mph, you're actually doing 29.4mph, radar gun would probably read 29-31mph depending on level of accuracy).