I carry a LOT of bikes and used to in my F-150. I bet you a dollar the bed always bowed and you just never noticed it.
The Baxley chocks are nice but a bit of overkill for my taste. I like the more simple pitbull or pingle chocks:
http://www.pingelonline.com/removable_wheel_chocks.htm
Not only can you pull tight up against them but they also hold the tire from side to side movement that happens even with a propoerly installed canyon dancer.
As much as I llike Charlie V at Pitbull I gotta say I like the pingle chock better but I will point out that we use nothing but pitbull stands!
Hey: My first post here!
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Craig "Huey" Stewart
Just some guy with a wrench
(who also used to have a funnier signature

)