quick tire rub question

[Old Blue]

Hey Guys,
I'm in the middle of laying out my flatbed/box on my '90 Xtra cab, and I have a question about tire rub on the rear frame.

Here's the deal. I"m trying to maximize the interior box space, and every inch counts. I'm using 2x2 square tube to run the length of the box, which will define the interior bed space. The safe approach is to run this 2x2 directly above the frame, keeping the outside edge flush with the frame. If I move the 2x2 1 inch outward, I can gain 2 inches of interior bed width. This however means that this 2x2 is overhanging the frame by the 1 inch.

The question I have is, with stock suspension and 33x10.5 tires on stock wheels, would the tire contact the frame or this 2x2 under full compression. I have removed the rear axle and therefore don't have the ability to take any measurements. In general, has anyone ever rubbed the frame with the tire? Or is the tire sitting out far enough to not rub under compression?

thanks

 

[KLF]

Very dependent on what the backspacing is on your rims. Stock rims?

 

[Old Blue]

yes, stock wheels. One thing I didn't mention but I belive you can see in the picture is that the 2x2 sits about an inch higher than the frame where the axle would be located. I'm going to build wheel well arches for clearance to the bed, but I'm just a little worried about that one peice along the frame.

I'm going to go back and move things around this morning to see if I can come up with something. My dilemma is that I need to carry a dirtbike and I need to accomodate 7 feet in the bed. Which is why I'm fretting over an inch here and there. I'm going to end up with an Xtra cab Long Box when I'm done.

thanks

 

[missouriman]

grind it smooth and let it rub a bit.

 

[Devil's Slide Doug]

I would not go wider than the frame and I would keep it smooth.

 

["N8"]

Youve got plenty of space for that extra inch as long as you use stock rims. and even if later you install a super flexy suspension or something comes up letting the tire rub at full stuff is not a big deal at all. With the weirdo tundra rims im running my rears rub the frame like crazy in stuff and its no problem.

Go for it dude. What kinda bike??? =D