I just picked up a new Trek 1.1 for riding a few times a week starting at ~10 miles a ride and moving up to more. I have a Subaru with the Subaru-branded Yakima Raptor roof-top rack. My old bike was a steel-frame GT Tequesta mountain bike so I had no concerns about crushing the tube with the clamp. Should I be worried about that with this aluminum-framed Trek? The rack is a wheel-on frame clamp style rack and would prefer a wheel-on style as the cargo area of the car is packed when I go on vacation (and plan on taking the bike).
My other concern is that in order for the wheel straps to hold the wheels I need to have them almost at the ends of the rack, and partway up the wheels so they actually secure the wheel. I don't have a hitch, didn't plan on adding one, I have an Outback with the swinging crossbar roof rack and plan on using that to carry the bike with whatever solution I have.
i believe that is the type of rack where you tighten the clamp by screwing in a knob
it may be possible to damage your bike if you really try to overtighten it
but it would take a whole lot of effort
it would not happen by accident
lightweight steel frames are generally more dent prone than burly aluminum like a chinese made trek
the walls on the aluminum frame tubes are much thicker than those of a steel frame