[aerohead]

Originally Posted by JacobLeSann

Thanks aerohead, all very good advice. I plan to integrate some plan taper, but keep the box the same width all throughout. The blind-spots will definitely be rough, but I think it will be manageable. I do want my rear window though, as I plan to use very small side view mirrors to reduce drag. On the flip side, the drag of a rear window design could cancel out savings from smaller mirrors. I’m not very good at reversing with mirrors, and much prefer to look out the rear glass.

I was thinking similarly as you with a slant-back topper, though I would use a flip-top tonneau cover like most pickups use. Coroplast would be lighter, though.

Leaving the bed open may be better, is what you’re saying? I like the idea, but I want to use a clamshell tonneau design like the Holden, so as to keep the bed clean. When tall loads are in the back, I could unbolt the hinges and remove it, leaving just the buttresses.


0.309 for the Commodore Ute? If that’s so, then wow! I’d bet money that is far better than a 1997 Civic Sedan.

' was just thinking that, if you weren't carrying 'tall' goods, and could tolerate losing the view through the rear window, enclosing the 'top', on long hauls, would offer meaningful drag reduction. It would be like CYBERTRUCK with the 'roll-top' cover in place.