You will want to check your brakes and bearings (and repack the bearings) either every 12,000 miles or 12 months, whichever comes first. When it comes to replacing those parts it's just a matter of checking to see if they are worn down or damaged prior to replacing them. There are so many variables when it comes to wear and tear on those parts that there isn't a set number or range when to change them which is why we have the maintenance schedule. As long as you stick to that you should... view full answer...