Disgruntled Grad Student
Join Date: Dec 2007
Location: Pittsburgh, PA
Bikes: CAAD 10, Cross Pro, Cross Comp, TK2
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^^ perhaps its only a misconception, but i was always taught that tire levers were only for tire removal. using anything like a tire lever to put the tire back on can easily result in a pinch flat... (you can use a bead jack
, but under most circumstances, elbow grease works just fine)
deflate the tire, make sure the tire is seated properly, then reinflate. i'd wager that's the problem.
otherwise, dismantle everything, and check the tire bead and rim surface for defects. if you still can't find a reason for what's going on, buy a new tire to see if that's the problem (new tire will be cheaper than new rim). if you're sure of your tire installation ability, have a new tire, and it's still a problem, process of elimination suggests that it's the rim. consider taking it to an LBS to see if they can do anything for you, or just buy a new rim/wheel.
if you want, I can make you a handy flow chart.