That rear caliper bracket that floats and is held on with a snap ring.... Mine has always made a rattling noise when going over bumps at lower speeds, now that my gearing went to 19 teeth front and 41 teeth rear, my adjustment for my chain is about at the end of the eccentric, but the chain can be adjusted to specs. Problem is now that the caliper bracket really rattles like anything, very annoying. Anyone else experience this. I only have a 1000 miles on it, it's a 2015.