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The spoke opening on my wheel/rim is quite small and I can't fit my tire pump on the air valve. What type of air pump should I use? You may want to try a mini pump, they are quite small and work well as the tires don't require much air to fill them. Some brands even omit the thumb lock so the valve adapter is very small. My inner tube is not holding air, what do I do? Here's some helpful information on how to service your tires for maximum performance.