I have a brand new 33x12.50 swamper that was slashed on the sidewall....

I want to know how to patch or "boot" the inside and what tube I can use so that I have a spare tire....

or am i being foolish?

I'm having the same thing done today at the tire shop when I get the alignment done:D

If it's a bad cut you can sew it up with fishing line and patch the inside to keep the tube from trying to get out. If it's not bad you can probably just put a patch on the inside.

I run TSL Radials, so I have a LOT of pratice in doing this. :)

Is it a radial slash (going from center of wheel out to tread) or inline with the tread? That plays a big roll in how well it repairs.

Get a boot (large patch, reenforced), as large of one as you can get into the area (at least 2-3" longer than the cut). Get a stone or wheel for your drill or die grinder to grind the rubber inside the tire. On the radial there is little ribbs running inside the tire. You need to grind them smooth to get a good seal. Grind the whole area (stop before you get to the cords :D ) bigger than the boot. Apply the glue liberly, and work it into the rubber with your fingers. Again, a little bigger than the boot. Let it dry ('till just tacky) then pull the plastic cover from the inside surface of the boot (be carefull not to touch this once the cover is removed) and place centered over the cut. Stitch (the little spiked wheel thingy, you'll need one of those too) the boot down starting at the center and work out. Stitch it in good, then it's ready to go.

I've successfully fixed 4 - 5" cuts (radial direction) without having to run a tube. Some case (if it's close to the bead) I can't get a perfect seal, and I have to run a tube with it.

A cut going the other way,,, well good luck. If it's small (1") it may hold ok as long as you don't need to air it up much (not a lot of hwy running). This kind wants to spread and tear with air pressure.

In some extreme cases, I've seen SS wire or even Kevlar fishing line (hey, it worked for a spare ;) ) used to sew up the cut then the boot is applied. Usually, if it's that bad it will not hold long. It can get you buy if you are desperate.... :)

Find a place that knows how to vulcanize a tire and have that done... Then just run a tube to be safe, and consider it done :cool2:

Find a tire store that does vulcanizing. They can use actual liquid rubber an fill the hole in, grind it down smooth and its almost as good as new. I have a couple of my swampers done like this and no problems in the last 2 years.

Sorry I didn't see that its a radial. If any of the wires are cut its screwed.