I went to WallyWorld picked up a pack of two valve stems. Got the four pack of skull valve covers and some grips (mine were Schwinn). I stuck the valve stem into the grip (valve forward) and pushed it through the hole in the end of the grip with a screw driver. Push it out so the threads come out, screw on the skull valve caps and you're done! Cost me about $4.50 + tax 8)