Need help changing a flat bike tire or tube? Check out this clip on YouTube: How to Change a Flat Bike Tire Don’t want to change your own flat? Bring it in and we’ll do it for you while you wait! Our bike repair shop handles all kinds of repairs … from changing flats to complete bike overhauls. Check the sidewall of your tire to get the exact dimensions of your tube when purchasing a new one, and be sure to buy the proper valve (schrader or presta). Presta valves come in different lengths to accomodate the thickness of your rim. You want to inflate the tire without pulling on the valve stem. Smooth presta valves also help keep the gasket in your floor pump working longer. Typical valve lengths will be 34, 48, 60 or 80mm. Our bike store is near you in Mt. Kisco NY and has a great selection of bike tubes and bike tires. Stop by and we’ll help you pick the right setup for your bike.