I got a Trek 8000 Police bike in a government auction. The only thing it needs is new tires and tubes. Tire size is 26 x 2.1 and I can get them at Wal-Mart but the tubes are unlike anything I've seen before. The valve stem is half the size of a regular stem and it has some sort of thing blocking where the air goes in. Wal-Mart only had the regular tubes so should I just drill the hole in the wheel to fit a regular tube or look elsewhere?

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I got mine a Wal-Mart. Feel good about it. But tires a little thin on road bike thinner than most road bikes and skid out a little when turning. Also why do I always need to adjust handlebars by rotating? Also why usually need to raise handlebars also? Why don't they just make them rotated?

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I cannot spend more than 300 dollars. I dont want one of those cheap bikes you get from wal-mart or target. I was looking at the diamondback bikes but i need more ideas. Im going to be riding in dirty trails so it doesnt have to be super advanced or expensive.

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