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Old 07-28-07, 01:59 PM   #1
ejr13
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Should I switch tires?

My ride has Conti. Grand Prix 4-Season (clinchers) tires on it. They are starting to go fairly bald so I want to replace them. Are there any reasons to try another tire? I seem to have gotten about 350-400 miles on them I think my friend put about 150 on them before me. The roads I ride are pretty smooth but tend to have tiny debris on them much of the time. Thanks.

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Old 07-28-07, 02:12 PM   #2
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New ones are "fairly bald". Have you looked at a new one to compare? 600 miles is nothing!
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Old 07-28-07, 02:13 PM   #3
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As a conservative estimate, you should be able to get 1500 to 2000 miles on a rear tire like that one, providing it doesn't get damaged (e.g. casing cut by a sharp object). Road bike tires don't really need "treads" so the tire can be perfectly smooth and still be o.k. Make sure you keep them properly inflated. I usually replace my tires when I can start to see the fabric cords underneath the rubber tread starting to peek out.
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Old 07-28-07, 02:35 PM   #4
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Thanks for the advice. They had a small tread (grooves) to begin with and the rear is mostly gone and the front is about half way bald. No cuts or damage that I can see to the tread or casing. I guess I'll keep going until they show some of the signs you have warned about. I do my best to check the presure and adjust before everyride. I'm no lightweight, 210+ so would I go through them faster?
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Old 07-28-07, 02:42 PM   #5
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Originally Posted by ejr13 View Post
I'm no lightweight, 210+ so would I go through them faster?
Yes. You may want to think about replacing the rear.
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Old 07-28-07, 04:22 PM   #6
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This is from Sheldon's website:

Quote:
<H2>Tire Wear-When should you replace your tires?
Quote:
Many cyclists waste money replacing perfectly functional tires simply because they're old, or may have discolored sidewalls. If you just want new tires because the old ones look grotty, it's your money, but if you are mainly concerned with safety/function, there are only two reasons for replacing old tires:
  1. When the tread is worn so thin that you start getting a lot of flats from small pieces of glass and the like, or the fabric shows through the rubber.
  2. When the tire's fabric has been damaged, so that the tire has a lumpy, irregular appearance somewhere, or the tube bulges through the tire.
Cracks in the tread are harmless. Small punctures in the tire such as are typically caused by nails, tacks, thorns or glas slivers are also harmless to the tire, since the tire doesn't need to be air-tight.
</H2>
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