I have a tire question for you experienced RVer’s.  I recently purchased a 40’ American Eagle on a Spartan chassis.  The tires are right at ten years old and the service center said they have some small cracks and they need to be replaced.  The tires I currently have are Michelin 275/80 R22.5 XZA2 but they are so expensive I am considering Bridgestone 295/75 22.5 as replacements (I run Bridgestone’s on our fire engines and they provide very good handling and service).  My concern is the ride.  The coach rides real smooth with the Michelins and I don’t want to make a big mistake in ride and road noise.  Any help?