Matt A Napa , CA May 16, 2016 Rack was falling out of rail The rack roller had worn away on one side and would slip off the rail. Replacing the roller corrected the problem. I ordered an extra just in case one of the other rollers failed. Just use a flat screwdriver to push the clip open enough to take the part off and snap the new one on. You'll be done in less than a minute. Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes