My trailer is very similar to Rhino's, except it's a tilt instead of a ramp trailer. I have a Harbor Freight wheel chock, but have never actually used it for bikes. I mostly use it to haul mowers, long ladders, anything too big for bed of my truck. Bought it used, along with a riding mower, mower trailer, and tag along seeder for $1,500. Sold the mower a year later for $1,200, so I'm pretty much clear on the other stuff. Craigslist: that's the ticket!