http://www.changemytyre.com/car/up-size-car-tyres/bmw/tyre-upsize-for-bmw-bmw-z4-f

Tyre Upsizing options for BMW – BMW Z4 (F)

Original Size: 225/40 R18

Tyre upsize options in +0 Inch up for BMW BMW Z4 (F)

No Option No Option No Option
No Option
No Option
No Option

Tyre upsize options in +1 Inch up for BMW BMW Z4 (F)

No Option No Option No Option
No Option
No Option
No Option

Tyre upsize options in +2 Inch up for BMW BMW Z4 (F)

No Option No Option No Option
No Option
No Option
No Option