Re: low profile tires. (quicksand)
So it really has nothing to do with our roads being bad, does it? Because if it did, you wouldn't want such short sidewalls with 17's either. The extra sidewall compared to 18's is what's going to protect your rims from those maneating potholes out there. Putting 35 or 40 series rubber on your 17's defeats the purpose.
If you really can't afford 18's, then don't do it.... Unless you are willing to live with the speedo error, higher rpm's, inflated odometer readings, slightly worse fuel economy, slightly faster acceleration (due to the effectively shorter gearing), and no more protection from bad roads than 18's.
[Modified by catalytic, 7:23 PM 2-12-2002]