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The concern isn't blacktop it's concrete. When tires sit on concrete you end up with the black marks. According to a retired Goodyear engineer who presented at an Escapee Boot Camp, that's an ingrediant in the concrete leaching out the anti aging compound from the tires. When asked if asphalt and gravel were ok, he said not to worry if parked on them.
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Dick, Joyce, Diego, Picatso and Gustav
2017 3720 RL, and 2013 HC 343RL
Pullrite Hitch, IS, Disk Brakes, 3rd AC, Winegard Traveler, Bathroom door mod, Dometic 320, couch for desk swap, replaced chairs, sun screens, added awnings, etc.
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