TrunkMonkey a an ingenious solution to transport bicycle when driving in car. The TrunkMonkey uses no metal clamps to avoid damage to your cars. Its an inflatable frame that stays in trunk of your car when not using it. Or you can just roll it and store TrunkMonkey in the compact carrying case attached to bicycle. The TrunkMonkey comes with a portable air pump and carry-case.
Available at trunkmonkey.co for $100