If the tube that you are using has a straight valve it can be really difficult to get the pump all the way on. I would encourage getting a tube that has a bent stem. Also, I would highly recommend getting a bike pump with a pressure gauge from you local bike store. The pump should only cost you about $25 and will save you a lot of time and hassle. phil&teds tires are finicky and it's really easy to over inflate the tires. For phil&teds replacement tubes you should check out Little Mountain Outfitters. They sell the right size tubes with a bent stem.

Why? it should work unless the valve on the tyre is faulty than you need an inner tube for it. You can order inner tubes from www.buggypitstop.co.uk