This sprocket:
http://www.slanecycles.com/shimano-s...n¤cy=USD will fit this wheel:
http://www.amazon.com/gp/product/B00...-2147483553-20 , but that's only one sprocket out of a "cluster" of 8 or 9 sprockets. It would be helpful to know what kind of bicycle you're going to be putting this wheel on, in particular how many "speeds" it's set up on the rear wheel.
I think you should be shopping for a "cassette", like this:
http://www.slanecycles.com/shimano-a...t-p-11028.html but we need more information.