Originally Posted by ChrisYJ - Italy
Hi to all, i am considering to do my own grooving and/or siping on my 35x12,50-15 BFGs. I think they could perform better with some sipes in them as i spend a lot of time in ice and snow. Maybe i could also use some extra groovin, but i'm not too sure about this.
I was just curious to see what you guys have done, and how it worked out for you.
Pics of modified BFGs are greatly appreciated!
Thanks to all!!!
I've never grooved or siped a tire myself, but I had a tire sipe my Cooper ST recently. I had their center treads siped, but not the outer at all because each outer tread already has 3 deep, wide factory sipes.
The tire stores put them on an automated machine, which might not get each sipe where it's supposed to be, or maybe that's from a careless, lazy operator. Some of my sipes, many of them really, are to near the end of a lug. So those lugs will chunk for sure, but it probably won't matter since it's only on the leading or trailing edge of many lugs, but most of each lug will not chunk, IMO. So they did a good enough job, but I'm sure they could have done a lot better if they tried/cared more. However, even with a careful machine operator, I don't think a machine can ever be as accurate or as good as done manually with a razor knife, like a sheetrock knife with new blades.
Point is, you can do a much better job yourself because you do it manually, and because it's your tire and so you care a lot.
I started a thread about this do it yourself siping and grooving a while back. I've never done it myself, but would love to do my own next set of tires. The thread I started included links to where you can guy tire groovers, sipers, and grinding wheels for "adjusting" tire tread. It looks like the equipment doesn't cost that much.
I'd like a BFG MT 33 X 10.5 R15 with a groove in center of each center tread running at a right angle to the tread (approx right angle to tire rotation), and then add a few sipes on each side of the groove.
You can buy a grooving iron for about $75. You can also buy some type of special siping knife that uses razor blades (I assume of the sheetrock knife type blade), or just use a sheetrock knife with new, sharp blade to add your sipes.
Yes, I do think adding your own to a BFG MT is a great idea, and it's also economical. The tire store charge me $75 to do a sloppy job on my 5 tires. For that same $75 I could have bought a groover, or less money than that I could have bought a specialty siping knife, or used my sheetrock knife for free, and I dam well know I'd have done a more careful job than the tire store did.
So ya, doing it yourself is the best, IMO, and it's affordable too.
If you want the links to wear to buy the tire groover, siper, and grinding wheel, you'll have to find the thread I posted about that a few weeks ago.