The Hanover Insurance Group is planning to lower its insurance premiums in Massachusetts for new and renewal motorcycle policies by 8.5%.

The new rates will be effective on April 1, 2008. They are the first to be placed on file by the division of insurance under the state’s managed competition system.

Vincent Nieroda, president of The Hanover’s Massachusetts personal lines group, said: We are thrilled to be able to reduce rates for motorcyclists, just in time for the spring riding season to begin. This is one more example of how good drivers in the state can benefit from managed competition.