I needed to get longer bolts for the top holes - the ones it came with wouldn't go through the Transom completely. I also found that during install, unless your bolts are absolutely flush, it will cause the retaining pins to be difficult to seat. I ended up drilling new holes, and enlarging the existing ones a bit, and now everything is fine.My recommendation is to get a lanyard/attach the pins to something, I lost one in the water as I was coming into the dock trying to drop the wheels (also, pretty difficult to submerge an inflatable tire, and get a pin in a hole at the same time without having some additional clearance).Other than that - they work great, I had my Jon boat loaded with equipment and used the tires to wheel it from the parking lot to the ramp with no trouble - make sure you grease everything the directions say to!