51.   Maintenance was more routine, experts say, when tires were more in mind, because they often blew out or wore out.

52.   Most consumers seem to have decided that their tires are maintenance-free, according to a telephone survey by the Rubber Manufacturers Association.

53.   Normal car tires are four-ply.

54.   No one is suggesting that tires are commodities, differentiated only by advertising.

55.   Of course, this might have been because the tires were bias-ply, not radial tires, Williams said.

56.   One front tire is balding precariously.

57.   One discarded tire can be the breeding ground for tens of thousands of mosquitoes over a season, the District of Columbia health department reports.

58.   On a passenger car, the tires are straight up and down because the car runs on flat roads.

59.   One long-term solution is a system built into the car that warns when the tires are low.

60.   One time he ran carrying his bike -- his back tire was flat and walking would have made him late.