First I hear of them not fitting, did you take one out and see if it slides through the hole w/out being mounted on the bike. The angle once it's mounted can be a little bit tougher to get the seat to go on. But they are WELL worth it! I'd give em a call and see what's up.I just bought these and the metal collars on the seat DO NOT FIT over the seat pins. Its not even close! Returning them!