I rode a Thunderbolt several thousand km, didn't have any issues with the frame.
transported it in the back of my pick up- made sort of a bike holder with a section
of 2" plastic pipe bisected the long way to put the wheels in, then secured it with
a pair of tie down ratchet straps.
Also transported it on the back of my spouse's care with a T2 transport rack, I have
an older model made before Thule bought them out. My HPV StreetMachine also fits
nicely in this rack. This past summer I got a Thule InstaGater for the pickup,
which has nicely transported ever bike i've tried in it- the StreetMachine, various
mountain bikes, my youngster's 20" wheel bike and a CrossCheck with 42x622
tires; handiest "bike rack" i've tried.