I have a Road Gear rack that mounts on my trunk with straps. If you mount it carefully, it will not scratch the trunk edges. I would hate to scratch my car with it, but I love riding. And it has worked good for me so far.

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Ali Al-Chalabi

2001 CLK55
1999 Dodge Ram 2500 Cummins Diesel
2002 Harley-Davidson Fatboy
Merlin Extralight w/ Campy Record