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Originally Posted by sperry
So, can you run R-compounds in STX? My car's no longer stock... muhahah! Is the NDS and DS division a National thing or just local to Reno, I've never heard of NDS, and I always thought "Stock" meant street tires with a 220 wear rating.
One more thing: how do you like the V700s on a 16" rim? Hows the sidewall flex?
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I don't know enough about STX, but here's a link which indicates your treadwear has to be 140+ for STX, therefore the kuhmos will not be acceptable:
http://www.subrew.com/stx_subie.html
DStock is national, N-anything is not (some regions like Reno have a street tire class to get more people interested in autox without large investment in racetires).
Stock is like you just got the car off the factory floor, very few mods allowed:
http://www.subrew.com/ds_subie.html
On the V700's I had a lot of sidewall flex, but I figured it was because I was running the pressures around 37/33. The lower pressures helped my traction around tight turns - though I've heard varying theories about pressures & turning etc etc, so I was in experimentation all summer.