I have asked CSC that very question 2 times to be exact. Once on this forum. Check a few post down and you'll get their answer. Even though those guy are smarter than I am and after looking at my CSC I cannot for the life of me figure out why they cannot come up with something that will fasten in the receiver that would at least protect against the inadvertent bumps, scraps and broken lenses etc. it doesn't have to pass the government 20 MPH crash test. I really think they are missing the boat. There is at least one mfg that makes a very nice looking bumper for their trike.