Anyone regrooving their own tires? How many 32nds can you remove without getting into the steel bands?
Dont take it any lower than the maximum depth of the deepest grove. Any deeper you will be compromising the layering of the base rubber.
If you can't take it any lower than the deepest groove you gain nothing. The tires will not be capped nor do I need a casing credit.
Its a trial by fire type of thing HeavyDude. Just use caution the blades are sharp and with it being hot it cuts thru skin pretty easy. From the voice of experience!
Take your time and go slowly. I had mine done once, watched the guy thats about as close as I got to it. He went slow following the old tread pattern looked like he was taking out about 2 or 3/32. You wont be able to trade your tires in after you regroove them. If your running 11/24.5 casing are not worth much anyway.
I've only cut groves into the the mud tires of my p/u truck for better winter traction, however I didn't go any further then the original groves. I used a dremal tool with a thin grinding wheel/cut off disc. The cuts were only 1/16" wide but I did two or three cuts per block depending on the block size. I think it really did help on snow and ice and I really don't think that was just in my head, however without real testing it's hard to say for sure. Useing the dremal tool worked pretty good. It was smokey and made a mess of the gloves and long sleeve shirt that I was wearing but I never had to change out cutting disc and I think it only took me about an hour and half to do. I'm sure a grooving tool would work much better and get you wider cuts, but I just used what I had in the garage. That's all the input I can give. Good luck.