Precision machined CVT sheave provides increased 'travel' which allows for taller gearing, and higher top end MPH.
The great part about this product is that there is no 'compromise'. It provides more top end MPH without sacrificing low end. It does not raise the overall gearing. Low end gear ratio is not affected at all, it simply allows a taller high gear. It's one of the few performance mods that do not involve a compromise.