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Originally Posted by cmiovino
I think that the RT660's might be better for an all around tire that's going to get you through 20+ events, lower camber car, and deal with temps from 50-90 degrees. I'll probably choose these next year and see how they compare.
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I have 3 days on my RT660's and they look like shit and I have already flipped them once. I am thinking 5-6 max. 80-85f ambient when I ran mine. -3.6F, -2.5R camber with zero toe. This is my left front which saw one day on the right side, and the last two on the left all run on CCW tracks. The funny inner wear was from running too low of pressure during a couple sessions I believe.
The 660 is very condition sensitive. I had a day where 37 hot felt great. Next, 37 hot was too much and 33 hot was the um, hotness. Then 33 hot wasn't enough and had to go back to 37. It is really annoying, seems you are constantly chasing pressures with this tire. The sidewalls are really stiff and you can run a pretty wide range of pressures, which is good because you need to. They also fall off a cliff after about 2-3 hot laps, the window they are at their best is just really small. Out lap, good, good, .25-.5 sec slower, .75-1+ second slower over a lap just under 2 min.
There also seems to be an issue with the tread belt on the 660. I have two tires with this line on them. It isn't deep and is wearing away. The guy next to me in a golf R had 660's and his went all the way to the cord and Tire Rack replaced it.
Edit: Apparently this is an issue. I found a bunch of other info on this searching online. From S2K forum.
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The condition that we see in the photo is an open tread splice. A visible tread splice typically occurs on the front axle, where braking forces are highest, or on the rear axle of RWD vehicles. Unfortunately, we cannot see how far this open splice extends so we cannot make a determination if the tire should be removed from service. If the tire progresses to the point that it should be replaced this is a warrantable condition.
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