Effective June 1, 2008, the Toyo R888 will become the mandatory tire for the Spec Focus class. Size will be 215/45 17. Until that time, either the Toyo RA1's in the current 205/40 17 size, or the R888 can be run. No mixing and matching of tires is allowed.
The change is due to Toyo phasing out the RA1 during 2008.
As a result, LC Racing in conjunction with Ford, NASA, and Toyo undertook a week of comparitive tire testing. The R888 was chosen as
1) Overall performance of the car was improved
2) the tire showed significantly improved wear characteristics - especially in the shoulders of the tire
3) Enhanced overall appearance of the car (it fills out the wheel wells MUCH better :thumbup:)
4) Minimal cost increase (about $5 per tire here in the DC area)
Link to toyo's website is http://www.toyo.com/docs/tires/tires...&category=comp