Wheels and Tires Discussion about wheels and tires for the S2000.
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Optimal tire pressure: Kumho MX

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Old Jun 4, 2006 | 08:34 AM
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Default Optimal tire pressure: Kumho MX

Put these tires on my S at 35psi all around and went for a run on some back roads on a 70
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Old Jun 5, 2006 | 11:20 AM
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I run 34 cold anything higher does nothing. Also, my MX's were slippery for the first 1k miles and also remember that this tire has a lot of tread on so you will feel the tire "squirm" I also feel that this tire like a lot of negative camber. Once I got the UK allignment done, the tire performs awsome. On the track, I will start at 30-31 psi since this tire heats up very fast. My SO2's were more temp stable.
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Old Jun 5, 2006 | 12:00 PM
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for $95-$120 each there gotta be something bad bout them...

how are the sidewalls stiff???

im thinkin bout gettin them as well.. 215/45 front n 245/40 rear.
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Old Jun 5, 2006 | 12:59 PM
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The sidewalls on the MX are fairly soft for a high performance tire. I've never run them on the track, but I would image you would need significantly more than 30 psi cold for track use to keep the tires from rolling over and deforming.
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Old Jun 5, 2006 | 01:33 PM
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I just started with 35 cold psi - great for daily driving, not so good for sprited driving. I'll probably drop the psi to 32 cold and try again this weekend.

I'm running 215 f 255 r on my AP2, so far at 35 psi, what I've noticed (compared with my 3/32 r RE050's) over the first 500 miles is slightly lower mpg (20-30 miles less per tank or so highway, but it may be summer fuel and stickier rubber) , much better ride quality, quieter ride, tires chirp more (RE050s didn't chirp at all, they just melted away) - impending loss of traction is much better communicated, but the tires chirp constantly when cornering on rough surfaces - guess I'm just used to the quiet Bridgestones.

Once I drop psi I'll see if the car settles down.
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Old Jun 6, 2006 | 05:24 AM
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Originally Posted by Voodoo_S2K,Jun 5 2006, 03:59 PM
The sidewalls on the MX are fairly soft for a high performance tire. I've never run them on the track, but I would image you would need significantly more than 30 psi cold for track use to keep the tires from rolling over and deforming.
I have 500 track miles on my MX's with no problems. They don't role over and I have chalked them to verify. The only problem I have with this tire is that it gets "hot" very fast. Higher pressure equals more response, but they have less grip for long sweepers. The tire will also get better as it wears and they wear fast. I am at the wear bars at 6500 miles.

Also, the sidewalls are not that soft. I had to remount them on new rims and it took 2 of us the fit it to the rim with the newest equipment. My installer stated they were as stiff as runflats. But at full tread, it does feal softer since there is a lot of tread. At the bars on mine it much stiffer. I will be buying these again since if I go with the RE01's, I will get about 4000 miles out of those when I will get about 7500 miles out of the MX's for a lot less money and slightly less grip.
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Old Jun 6, 2006 | 04:47 PM
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Maybe you need to go faster ...JK

Well, don't know what to tell you, but compared to the SO-2's, RS-2's, and RA-1's that I've had on my car, I found them to have the softest sidewall and the least amount of grip. I also mount and balance my own tires. If you want stiff, try mounting a set of rally tires, now those are stiff.

I run 2 degress in the front and 2.6 degress in the rear and had no problem rolling them over and chunking them, but I don't expect the average driver to push them as hard as I do so I do recommend them to people looking for a good performance tire on a budget, however I rate the Hankook RS-2 better for a little more.

IMO
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Old Jun 6, 2006 | 04:53 PM
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Also, as david1 said, the MX's are very slippery for the first 500-1000 miles until the mold release wears off.
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Old Jun 6, 2006 | 05:01 PM
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good reviews... i will be buyin them later on when i find the right set of rims..

or unless my stock S02 runs out..
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