The notes I see on the Extang RT Tonneau say it can NOT be used with over the rail bed liners. What about the spray in bed liners? Does anyone have this tonneau with a spray in bed liner over the rail? I do not see why it would be a big deal but, just curious. Looks like it's Extang RT Tonneau for me..unless teh spray in bed liner is an issue.

 

All of the tonneaus clamp on the the inside lip of the bed cap, this is why a over the rail bedliner will not allow the cover to clamp on unless you modified the bed liner.

Spray in liners do not affect this area.

 

I have the Extang on my 05 F350 with a spray in bedliner. Works great. With the over the rail you cant grab the top lip of the bed.

 

Im sorry I have the Extang Saber. It has the lip edge that seals around the outer edge raised slightly above the bed. I dont like how the velcro attracts junk in it, and the way the frame of it is inside of the bed so much. It does look nice.