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Old 02-20-2007, 10:40 AM   #1
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Siping Mud Tires??

I was talking to a guy at work last night about me getting new tires. I told him that I was thinking about going with the BF Goodrich MT and he told me I needed to Sipe the tires if I got mud terrains. He is a big Jeep guy so I assume he knows what he is talking about but I wanted to see what everyone on here had to say about it. His instructions were to cut a 1/4 inch deep cut every 1/4 inch or so on the lugs of the tires. He said that this would really help the grip on surfaces such as rock and would really help the life of the tire when driven on road. Just wanted to see what everyone had to say since there are such varied opinions of everything on here!! Thanks

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Old 02-20-2007, 10:47 AM   #2
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siping will definitely help but i have those tires and you don't HAVE to do it...they grip fine offroad and they are fine on road.

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Old 02-20-2007, 11:45 AM   #3
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Your friend is not wrong about siping. You will get "More" traction out of them, but I feel for a mainly road driven tire it can actually make them wear faster. With less tire touching the road the load is not as evenly spaced and therefore will wear down the patch quicker. Plus with siping tires you will find that they will chunk off faster while on the rocks.

Plus it's pretty expensive to have done unless you have the tools and the time to do it yourself.
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Old 02-20-2007, 11:59 AM   #4
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Originally Posted by 1BLKJP View Post
Your friend is not wrong about siping. You will get "More" traction out of them, but I feel for a mainly road driven tire it can actually make them wear faster. With less tire touching the road the load is not as evenly spaced and therefore will wear down the patch quicker. Plus with siping tires you will find that they will chunk off faster while on the rocks.

Plus it's pretty expensive to have done unless you have the tools and the time to do it yourself.
it wont make them wear faster ... and it wont make them last longer ... you get the same life out fo the tire and you do get slightly better traction as siping gives the tire more biting edges to grip the terrraine ... JP magazine (i think) did a column on it a year or two ago
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Old 02-20-2007, 12:06 PM   #5
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Well if JP said it then it must be true. They also wrote one a few years back that said if you did it, it may lead to faster wear as now the dirt and grime have slots to get inside of vs a flat solid surface to keep them out. Most people who sipe tire's usaully have trail only tires vs DD tires.. Frankly for the cost and the time I don't think it would be worth in your case.
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Old 02-20-2007, 12:19 PM   #6
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it wont make them wear faster ... and it wont make them last longer ...
I'm calling BS on this one. It's simple. If you sipe a street tire you will chunk/wear out that tire faster than you would the same tire with no siping.

The only potential benefit you could see would be a hair better gas mileage from cutting weight from large tires and by large I'm talking 35" and higher not 31's or 32's.
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Old 02-20-2007, 12:35 PM   #7
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The only potential benefit you could see would be a hair better gas mileage from cutting weight from large tires and by large I'm talking 35" and higher not 31's or 32's.
cutting weight?

I don't know much but ,I thought sipped tires just had little 1/4" deep slits sliced into them along the tread.(?) are you talking about grooving?
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Old 02-20-2007, 12:37 PM   #8
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cutting weight?

I don't know much but ,I thought sipped tires just had little 1/4" deep slits sliced into them along the tread.(?) are you talking about grooving?
Mental note, don't get on the board with less than 2 cups of coffee. Yeah, I was thinking of grooving right there.
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Old 02-20-2007, 12:39 PM   #9
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I am sure that it will help with traction but I didn't really see how it could really help out with wear on the street. He said that it would help with wear. He did a set and he said he used a skil saw with the blade depth set to 1/4 inch. He said it was time consuming and stunk but he said it wasn't too bad to do yuorself. I just don't know about buying a brand new tire then taking a knife or a saw to them.
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Old 02-20-2007, 12:46 PM   #10
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I am sure that it will help with traction but I didn't really see how it could really help out with wear on the street. He said that it would help with wear. He did a set and he said he used a skil saw with the blade depth set to 1/4 inch. He said it was time consuming and stunk but he said it wasn't too bad to do yuorself. I just don't know about buying a brand new tire then taking a knife or a saw to them.
on my next set of tires I plan to sipe them with one of those construction blades, with the blade set out at 1/4"
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Old 02-20-2007, 12:47 PM   #11
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Quote:
Originally Posted by 1BLKJP View Post
I'm calling BS on this one. It's simple. If you sipe a street tire you will chunk/wear out that tire faster than you would the same tire with no siping.

The only potential benefit you could see would be a hair better gas mileage from cutting weight from large tires and by large I'm talking 35" and higher not 31's or 32's.


right ... the BFG ATs, with all that siping ... chunk and wear like a mofo .... amirite?

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Old 02-20-2007, 01:31 PM   #12
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does anyone have a decent pic of a set of siped tires so i could actually see what it looks like finished??
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Old 02-20-2007, 01:33 PM   #13
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does anyone have a decent pic of a set of siped tires so i could actually see what it looks like finished??


http://www.4x4wire.com/toyota/tech/sipe/

theres some on that page
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Old 02-20-2007, 01:38 PM   #14
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Thanks lost, looking at that i could see how it could help traction a lot but i don't see how it could improve wear on the roads.
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Old 02-20-2007, 01:42 PM   #15
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Thanks lost, looking at that i could see how it could help traction a lot but i don't see how it could improve wear on the roads.
Keeps the tread cooler, thereby increasing tread life.
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Old 02-20-2007, 04:06 PM   #16
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I think I'd have to see some science on the impact of this one. I don't doubt there must be some advantage to it since these grooves exist on most every street tire I've ever seen, but how much advantage and at what trade off? Besides, I'm WAY too lazy to do it.
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Old 02-20-2007, 04:48 PM   #17
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The idea behind extended wear is that the blocks will give a bit as they impact the road. Rather than resisting and wearing. It does improve the traction due to the increased number of biting surfaces.

Depending on what you're wheeling in, in the sharper rocks they tend to pull off chunks.

Someone mentioned AT's and why they don't chunk with all their siping. Difference is when you have it done all the cuts are left right. AT's go in every direction and helps to reduce any chunking.
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Old 02-20-2007, 05:34 PM   #18
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AT's go in every direction and helps to reduce any chunking.
I'd be will to bet that the siping being "cast" in the tire mold helps eliminate chunking, too. Sort of like bending a piece of plexi, you can bend it pretty far without it breaking, but score a line in it and SNAP! Don't know... just seems logical to me.
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Old 02-20-2007, 05:38 PM   #19
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I had read the above linked write up, and others.......so with a well worn set of BFG Mud Terrains I set out with a Sheetrock Knife and a mission. I gave each of the center lugs (3) 1/4"deep (approx) sipes letting the lug shape dictate the direction of the cut (mostly perpendicular to the direction of the lug). This did not take long, I recomend removing the tires, I tried the front with them on.....no fun.

Unfortunately I do not have much in the way of results......Nothing Negative so far, I drive it to work every day, but only did this late fall and have not been wheelin yet.

My Reason for doing this was for the Snowy/Icy Roads of NY. I have been less than pleased with Mud Terrains on slick roads...not that I expected much to begin with. We had a Very large storm on V-Day and I made it To and From work no trouble........(of course i drove my work van all day with not much trouble either)........ and an Ice Storm in the fall was also managed without incident.

Sorry for the Long Wind. To Sum Up:
So Far it's been worth the effort.
I'm glad I tried on an Old Set....so if I ever get New....
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Old 02-20-2007, 05:44 PM   #20
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The idea behind extended wear is that the blocks will give a bit as they impact the road. Rather than resisting and wearing. It does improve the traction due to the increased number of biting surfaces.

Depending on what you're wheeling in, in the sharper rocks they tend to pull off chunks.

Someone mentioned AT's and why they don't chunk with all their siping. Difference is when you have it done all the cuts are left right. AT's go in every direction and helps to reduce any chunking.
i never sipe perpendicular to the tread .... sure it will help with climbs and traction, but it doesnt help when side hilling ...

all of my sipes are parallel to the tread (side hill control) or 45 / 30* from perpendicular
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Old 02-20-2007, 08:36 PM   #21
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A lot of places will sipe your tires for you. $20 a tire max. I think when he said that the tires will wear longer, he meant that due to the siping the tire will run at a cooler temperature and therefor last longer. Not sure if that is true or not, but siping your tires will help with traction off road, as well as in heavy rain storms. But, the BFG MT's really are a decent tire with no modification. Just air them down a bit when u are offroad. IMO
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Old 02-21-2007, 01:18 PM   #22
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There is no downside to siping the BFG M/T tires that I am aware of.
Only benefits.
Better wet, ice, & slick traction. They do run cooler, however I would bet the extended tread life is so minimal as to be negligible.
They will also get better traction off road due to the increased biting surface on slick rocks and such.

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