We have a few sets of Full tread Toyo RA-1 from our World Challenge Cup car.
These were only used during a rain session with virtually no wear on them at all.

Sizes are 18" 245 front and 305 rear.
Will work on all 996 and 996 GT3's as well as 996TT with 18" wheels.


Great set of track tires and can be used daily drivers if you want a sticky tire.


SAVE SAVE SAVE SAVE


These look like new..



$750.00 per set 2 sets available.

 

Hey Fabryce,

I was told that these wouldn't work on a Turbo because the over all tire diameter front to rear (25.6-front & 26.3-rear) is off by too much (more than half an inch) and would thus fry the center diff coupling no?

 

I'll take one set. Please let me know how to pay for them.

Thank you.

 

Colby

We have run these on several turbos and have NEVER had an issue.

 

Just call me at the shop I can do a CC over the phone.

 

One set coming my way! See you tomorrow Fabryce.

 

Dang it! I just got rid of a set exactly the same!

 

Nerd, why did you dump them?

 

I thought with the tire diameters front to rear off by more than half an inch the center diff coupling would fry. Apparantly this is not a problem though.

 

The OEM tire sizes (F:225/40-18, R:295/30-18) yields a ~0.48% dia. difference

These RAs (F:245/40-18, R:305/35-18) yields a 2.73% dia difference

I would imagine the varying rolling diameter of the tire under load would be close to this dia difference.

I think it is a valid question. I know for STi's this was not a problem. I ran similar setups on those AWD cars. Good excuse to convert to RWD !

 

Revs per mile is 790 on the rears and 812 on the fronts, so the differential will be running constantly to handle the mismatch.

I have no direct experience, but reports of overheat and diff failure have been posted here- commonly folks say 0.3" is the most you should run- these tires are 0.7" different.

What would your opinion be on the maximum difference an AWD can tolerate? It would definitely open up tire choices if a larger difference can be run safely.

A

 

I have been running the Hoosiers R6's for almost a year now (315/30/18 and 245/35/18). According to their web site, the difference in Diameter front to rear is .9". I haven't had any problems yet, but maybe I have been lucky so far... I was thinking the max difference was an inch, not 1/2 inch. Woops!

 

Well if Fabryce says its ok, i trust him. Who knows, maybe it is an inch.

 

Second set still available?