by ttweed on Wed Oct 11, 2006 9:07 am
David-
The small flares on the early cars started in 1969, with the longer wheelbase tub, and remained essentially the same until the SC in 1978. The '65-68 SWB cars have no flares at all, and have different requirements than the '69-77 cars.
From your previous posts, I am assuming this is for your 1967 912? If it has a stock SWB body, I have found that the largest wheel/tire combo that can be fitted is a 205/50-15 on a stock (23mm offset) 7" rim, and you will probably have to roll the fender lips to use them. A 6" 36mm offset rim with a 205 will fit without any mods, but offers less sidewall support for the tire. You can squeeze a 225 on a SWB car in the rear with a custom offset rim, like the 911R Fuchs, but you will have to take the 2-point tire-width penalty under PCA autox/TT rules, and it may not be a legal tire for some of the Vintage racing sanctioning bodies.
HTH,
TT
Tom Tweed -- #908
SDR Tech Inspection Chair 2005-06
SDR Forum Admin 2010-present
Windblown Witness Assistant Editor 2012-present
Driving Porsches since 1964