AeroPod, PowerPod and Newton

How do I attach the stem mount to a small stem ? When I try to attach the mount there is a large gap due to the fact the circumference of the mount is larger than the stem.
Thanks

There are a couple of pieces of padding supplied with the mount that you can use. Or you can use any firm rubber piece that can fill the gap. Pieces of rubber supplied with a light or reflector that mount to your seat post also work well as filler. Just use as little as possible and use the hardest rubber possible so you have little or no flex.