How to align rear v brakes i have a bike that has v brakes on the rear wheel. Everytime i try to align the brakes after i ride and use a few times the rear brakes, one of the pads is rubbing on the rim. Please help as i have spent a lot of hours on it without gain anything. Thanks.
One of the likely culprits is that you've put too much spring tension in on the arms. Start by loosening the spring tension on the arms, adjusting the brake and then increasing to just enough tension. 

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