Tire Tech And The C4s Awd Question

[jyoteen]

So, as some of you know, my ContiSport Contact 2 are shot. I noticed yesterday that I have cords showing. No big deal....time to replace them. I was going to go with a set of Toyo RA1 because I can get one set free at this time. Cool.

I was set on getting a set of RA1s all around, until I noticed that Toyo doesn't list a comparable size to the 295/30 width found on the C4s. The 2 closest potential candidates are 275/30 and 335/35. Now, the 335 aint gonna fit. Too wide.

The GT2 has 315 wide tires, but that's the max. I was hoping that the 275 may run a little wider since it's an R compound tire, so I can go with that. Toyo also has a 305 width coming out, but seems that has been postponed.

My contact at Toyo emailed me the following:

"The rears are 24.96 overall diameter

(295/30/18)and the 275/30/18 RA1 is 25.6 which is just on the edge of the 3%

rule. The fronts are 25.1 which when matched with the 25.6 275/35/18 would

normally be okay, but with the all wheel system in your car, it might not.

There is nothing new in the RA1 line for a while.

You might want to talk to some Porsche people to see if this much of a

variance would harm the system or not."

So......am I screwed using Toyos? Crap. Trying to find circumference and other data on the Contisport Contact2 to figure out if I'm even close with any RA1 line.

Thanks.

Jyoteen.

[Tool Pants]

For what is is worth. On the PCA tech site it is said they should not vary by more than 4% on an all wheel drive.