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how do i know its time to change a tire?(7 posts)

how do i know its time to change a tire?Gall
Mar 30, 2002 11:05 AM

my conti 3000 is squared off. is this a sign that it needs changed or should i look for other "signs" when deciding to change a tire... and what other signs should i look for?

Conti's square off really fast.jw25
Mar 30, 2002 1:44 PM
In my experience, it only takes maybe 500 miles to get some significant squaring on the rear. The tread's thick enough to last longer, though, and as long as you don't hit anything big and sharp, you can ride it until casing threads show through. This is probably the only time I'd recommend swapping front and rear tires, after maybe 250 miles, but even then it's hardly worth it in terms of increased mileage.
Other signs to look forElefantino
Mar 31, 2002 7:09 AM
"Michelin Axial Pros sold here"

"Hutchinson Carbon Comp Air Lights sold here"

OK, so I've fallen out of love with Contis. To each his own.

possibly a dumb question about "squaring off"floatch
Mar 31, 2002 9:14 AM
I'm a somewhat "converted" mountainbiker, and I'm wondering what you guys mean by "squaring off." You can easily tell when a mountainbike tire is toast, but a road tire? Does it actually start to look square? My conti GP 3000's are nice and round now... will they really get square? Is that what you guys mean?
possibly a dumb question about "squaring off"grandemamou
Mar 31, 2002 10:30 AM
I think he means that you will be able to feel a distinct flat spot in the middle if the tire. Run your finger along the tire sideways and you should feel it. I run mine until the casing pokes through or until I start getting lots of flats.
possibly a dumb question about "squaring off"GreenFan
Mar 31, 2002 5:11 PM
Contis will wear down on the crown of the tread, leaving a flat along the apex that will continue to widen as wear continues. I've ridden 3000's until the casing threads show through with no problems...but at that point, it's time to change...blow outs suck, especially if you're going fast enough to break things.
Mostly depends on your weightKerry
Mar 31, 2002 6:18 PM
and what you consider "worn out." At 180 lbs, I get about 2000-2500 miles on a rear 23 mm GP 3000. That means the rubber is gone and I just start to see casing threads. My wife, at 125 lbs, gets double that mileage. While I wouldn't make a practice of racing crits or doing extended mountain tours with tires close to/starting to show threads, I've had no problems doing this for training rides. I've not experienced increasing flat frequency as the tire wears down. Don't switch front for rear to "get more miles" out of the set. When the rear wears out, move the front to the rear and put a new tire on the front.