18x8 ET 57 with 245/40/18 and 18x9 ET 43 with 285/35/18 - will I need spacers?

[KRAM36]

The front would need a 13mm spacer, the back will fit fine, you will actually have 9mm more room to the inside on the back wheels. 245 tire on a 8" rim is the max recommended, but for the 9" rear 265 is the max recommended size tire.

I got may spacers from here. 2003 Porsche Boxster Roadster S H6 3.2L - ECS Tuning

[KRAM36]

Have you already bought the tires? I hear 245 are a bad size for the front of the boxster for street use, they tend to follow road grooves really bad.

A better daily driver setup would be 235/40ZR18 275/35ZR18

[stephen wilson]

Originally Posted by KRAM36

Have you already bought the tires? I hear 245 are a bad size for the front of the boxster for street use, they tend to follow road grooves really bad.

A better daily driver setup would be 235/40ZR18 275/35ZR18

Not true, I put 245/40's on my 987 and didn't notice any increased "tramlining" than with the 235's.

[KRAM36]

Originally Posted by stephen wilson

Not true, I put 245/40's on my 987 and didn't notice any increased "tramlining" than with the 235's.

I should have been more specific. I've been told this about the 986 model, your 987 has electric steering.

[stephen wilson]

Originally Posted by KRAM36

I should have been more specific. I've been told this about the 986 model, your 987 has electric steering.

Nope, 987's have the same old Hydraulic steering as the 986.

[KRAM36]

Originally Posted by stephen wilson

Nope, 987's have the same old Hydraulic steering as the 986.

My mistake, thought I read it did.

The person that told me this was Johnny Danger when he gave me his number to call him about wheel and tire setup for my car. He has run a number of combos and he said not to go 245 in front because of the "tramlining".

We where talking the 986 though. Maybe Porsche changed something in the 987 that reduces "tramlining".

Even with my current 225's in the front I get some "tramlining", will 235's I'm getting be worse, guess I'll find out.

[husker boxster]

The 981 has electric steering.