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245-35 18 Anyone ever put these on the fronts?


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I'm going to be putting tires on my new rims soon and would like to go as wide as possible on the fronts to compliment the 285-30's I'm planning for the rears. This is on a 2000 Boxster S. The wheels are 8.5" et50mm and I am installing H&R sport springs with the intention of getting at least -1.5 degress camber and more likely -2.0 to -2.25 degrees. I would be willing to give up some turning radius if these would work. Any thoughts on the subject would be greatly appreciated.

Thanks,

CW

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I believe the 245's will rub slightly on tight turns with a factory RoW sport suspension. If you go lower then it might rub even more. A safe bet is 235's (IMHO).

Thanks Loren. What part are you saying would rub against the tire? When I put the same size wheel and offset (Fikse FM-5's) with 225-40 Michelin Pilot Sport Cup tires the only potential clearance issue was with the plastic fender cover in the front. This was with the stock suspension, though. My fear is that with wider tires the small clearance will turn into a larger interference. Does additional negative camber generate more clearance to that plastic cover? It seems like it would, but I haven't the geometry to check it out.

Again, thanks for the reply,

CW

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Due to the smaller overall diameter (compared to a 225/40) you may actually gain some clearance at full steering lock. The other potential rubbing points are the plastic air deflectors for the brakes and the clutch tubing in the driver's side wheel well.

Clearance increase/decrease due to camber is difficult to determine statically as the tire deforms under turning loads. You have to test to see what happens. If it rubs under no load -> bad, If it does not rub but is close you will need to test under load to see if there is a problem.

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Also tire brand will influence your clearance. A 245 from one manufacturer will be different than a 245 from another in terms of actual width. You may have a tire that fits fine and then decide to try a different brand or even a different model from the same manufacturer and find out that it rubs.

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