I changed my speaker too. I put the Hertz speakers in, and I have to say, they sound pretty good. But I don't listen to them anymore. I now have a set of 45mm JBL speakers in my helmet, and they are awesome.

Due to the low interest in starting a group ride from Spartan, it is now changed to Detroit Triumph in Shelby Twp.. Location information and timing is found on the main page of this website.

I’m waiting for a new version of the Challenger.