Change History

Most of us in Spec Boxster run square without spacers. The clearance on the suspension hasn't been an issue. Possible rubbing of the front wheel well liner seems to be the thing that happens, but I'm not even sure that's a 255 tire issue or a general issue with a slightly lowered car. I don't think spacers affect that either way. There are a couple of ways to mitigate that rubbing: 1) push (relocate) the liner mounting bracket (radiator bracket?) forward a touch; 2) replace the plastic push rivets that attach the liner (the heads are tall and more likely to "catch") ) with those torx bit dome head screws that are found elsewhere on the car like the rear bumper underside (the dome head is short and smooth).

The conventional wisdom is that square is generally better (more front end grip / turn in). But on a track that has sustained high speeds (Cal Speedway oval banking section for example) the aero effect of the wider tire may hurt top speed enough to be worse overall than staggered.

Most of us in Spec Boxster run square without spacers. The clearance on the suspension hasn't been an issue. Possible rubbing of the front wheel well liner seems to be the thing that happens, but I'm not even sure that's a 255 tire issue or a general issue with a slightly lowered car. I don't think spacers affect that either way. There are a couple of ways to mitigate that rubbing: 1) push (relocate) the liner mounting bracket (radiator bracket?) forward a touch; 2) replace the plastic push rivets that attach the liner (the heads are tall and more likely to "catch") with those torx bit dome head screws that are found elsewhere on the car like the rear bumper underside (the dome head is short and smooth).

The conventional wisdom is that square is generally better (more front end grip / turn in). But on a track that has sustained high speeds (Cal Speedway oval banking section for example) the aero effect of the wider tire may hurt top speed enough to be worse overall than staggered.