Gates stock sprockets and sheaves are all given a static balance up to 6500 feet per minute. This number is a rim speed, not an RPM. The maximum RPM a particular sprocket or sheave can achieve is also affected by it's diameter. The larger the diameter, the higher the rim speed, and if you exceed the 6500 ft/min limit, you need dynamic balancing to the particular speed you are trying to achieve. Dynamic balancing is not a stock offering, but Gates does have a department called Made To Order Metals that can help you source specialty balanced metal. You can get a hold of MTO Metals by phone at 1-800-709-6001, or by email at email@example.com
Not sure what your rim speed is? Use our free design software to have it calculated, or the equations below.
Here's what you need:
First calculate perimeter (inches): Pi * Diameter or 2 * Pi * Radius
Then calculate rim speed (feet per minute): Perimeter * RPM / 12