Rear bar alternative

Im no expert but I think you would need some pretty substantial tubing to cope with the weight of the wheel and swing arm........ and as always, happy to be corrected

I have got my spare 35" on my roof rack, getting it down will be easy but getting the bugger up there was a pain..

could use the winch to get it up on top
a telescopic arm that is hinged

Don't over complicate your design, remember the K.I.S.S. principle. As you may end up making more work than is needed

Ok so I'm pretty keen on this idea I've had for the rear bar alternative. There's a lot of editing in regards to designs so since the first rough one but it's still essentially the same. Any suggestions or things to look out for when designing and building it would be greatly appreciated! Thanks again guys, you've been a big help so far!

Looking at your sketches, i think one thing that might give you trouble is leaving the bar and hinges far enough away so that the big barn door will be able to open. I agree with above posts, i reckon there will be alot of weight on the corner. Mayeb adding a bar under the brake light might help
Look forward to seeing it though. I like the idea of protecting the rear wheel arches.

With all that extra railing there would be a heap of weight. I'm surprised no-one has designed a tyre carrier that is mounted on the tow bar, sorta like a bike rack, but with mounts for tyres instead. And to be able to open the doors with it mounted you just fold it down on a hinge so it goes flat from the original 90 degrees. Only downer is pulling more weight further behind the rear axel.

tyres are different diametres, if only because they wear.

It seems to me that the mechanism would work less hard if the design incorporated a support under the tyre and down to the chassis to take the load, except when the door is actually open - at which time the vehicle is usually :-) stationary.

The next brain explosion that occurs to me, is to build a frame that goes inside the door, that transmits the loads down to the door catch etc?

Hmm could a counter weight on the other side help the balance issue? Also to help with the amount of weight in the back being introduced, a set of airbags on either sides might help?

hmmm :-)