The rubber on a tire sidewall is not a lot different than the rubber in a bicycle brake shoe, which is much smaller, and applied with a lot more force than a tire opening a skirt. I'd just let 'em rub, and monitor the situation.
When I do mine, I'll put the hinge well above the wheelwell opening, and have the skirt overlapping the existing fender. That will make the seam easy to fair, and help minimize rubbing forces and troubles over, say, turning hard to open the skirt and then hitting a driveway ramp for maximum suspension travel.
|