Competition tire advice needed for early s

I'm taking my 73 S autocrossing this spring and plan to leave it in stock class, but the available sizes in DOT R compound tires are a bit limited for 15" rims...they're all 50 profile - we have:

205/50-15
225/50-15

I haven't found any more favorable tire sizes at TireRack.com. I guess my question is will 205/50-15 tires on the stock 15" fuchs rims fit on the front without rubbing (very MINOR rubbing tolerable)? I doubt it, but I'll ask anyway - will the 225/50-15's fit on the rears without rubbing (the car has been lowered maybe 1/2" from stock height)?

Thanks,

Brad

When I bought my Carrera 3.0 in 76 it came with 7&8x15 Fuchs rims. At tire replacement time I bought 205/50x15 for the front. They worked great. The same will be true of your 73. The back I really couldn't say except that at one time I also has a 72 with 7x15 and 215/60x15 which just barely rubbed ~5" up into the paint on the rear 1/4 panel. Don't hold me to closely to that last # it was a long time ago.

Yes both tires fit as long as you have enough negative camber. I use 205/50/15 as well as 225/50/15 on my 6" rims for A/Xing.


Kevin
72 911T/E

I don't have an early car, but have seen plenty at autox events. Most are running 205x50x15 all around. Seems the 225s will not clear unless you do flares or something.

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Chuck - '86 Cab, '77 Targa, '85 toyota 4wd rain mobile http://www.cheaterswayside.com/911/

One thing I'm sure you already considered is that anything wider than 205's will bump you up to a more competitive class.

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Zach
77 911S 3.2

Many thanks for the advice, I think I'll probably opt for 205/50-15's all the way around and leave the camber the way it is (although it is an interesting option)....I'm not sure how much adjustment is allowed to remain in the stock class, and I'll actually be driving the thing on the street on occasion (boy won't that be fun with R compound tires ) I don't think there is a limitation in SCCA AutoX rules as far as tire sizes, you must keep stock size rims but I think you can use any size tire (DOT approved) that will fit on the stock rims. Now one last question, any reccomendations on a competition tire brand? BFG G force? Kumho? Hoosier? Yokohama?

Thanks again,

Brad

I believe that R-=compound tires would move me out of the Stock class, in our local PCA events. I could certainly be mistaken though.

------------------
'83 SC

In the Zone 8 autox/tt rules, DOT-R tires will typically bump you from "street-stock" to "stock" classes - where the cars have a few minor mods but are not really tweaked out like the prepared/modified classes.

The Kumho Victoracer is a very popular DOT-R choice for 205/50x15 sizes...and can be street-driven for several thousand miles too. Or you can spend a bunch more $$ and go with the Hoosiers but then you'd want another set of event-only wheels.

I stay stock with 15X6 wheels with
Kumho VictorRacers 205/50s. I am
going to try buying them heat cycled this
year from Tire Rack. I do about 8
to 10 two day DEs and autocrosses
a season. Went through two sets last
year, so be a smooth driver or
your pocketbook will be suffering like mine was.

There really is not any other track tire
available for our wheels, though I thought I saw that Yokes were putting their A032R in our size this year somewhere (tire rack?).

One more thing, pick up a set of ATS cookie
cutters for track wheels if you can. They
are ugly but cheap. That way you have your
Fuchs for the street with good all weather
traction tires (like A008P etc.)

Bill
72T-->S
RMR region of PCA

Brad,

It all depends on which club you run with - stock class rules are usually different for each club - best to consult the rule book before making any changes to your car (205-50 will probably work fine). As far as R DOT tire choice, Hoosiers (Race or Autocross variety) work the best on our lighter cars, especially when it's dry and hot. Kumho Victoracer works better on heavy cars and when its damp and cold. The Yokohama AO32R is best as an "intermediate" tire when it's raining but there is not much standing water. For heavy rain and standing water a street tire like a SO2 is faster than anything else!

Randy W