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Topic Review (Newest First)
12-09-2004 10:40 AM
YJ_OVER_SJ I had some Yokohama Geolander MTs that, due to large lugs(even though the tire rubber was soft) would slip and slide on roads like mad. Definitely not safe on a rainy day.

Took it to the tire shop and had some offroad folks there. The suggestion was to sipe the center lugs and leave the outter-most lugs unsiped. Because, the outter lugs get a lot of work on rocks/boulders so small sipes would tear quickly.

Got the center siped and the onroad wet traction improved 10-fold. The tires also lasted about 50% longer than normal(because siping causes the tires to run cooler).

For any onroad driving I'd strongly suggest getting large tread block tires siped.
12-09-2004 07:51 AM
nwmud THANKS!!!!

great comments and thoughts - I really appreciate the input. I think I will go ahead and schedule a time to get the done. Don't have to schedule but it can make things go faster when they know your coming.

Ritch
12-08-2004 10:13 PM
5spd I just siped the center blocks on mine about a 1.5 yrs back after driving in slush and ice conditions. I did not like the way they slipped in that crap. I can tell a big difference in the stuff and feel a difference in traction. I have had no chunking either. Took em to WY and back, about 3400 miles after that with no noticeable wear also.
12-08-2004 09:46 PM
CSmith Go for it. It really does help. Especially if you ever plan on seeing any compact snow or ice. I work at a Goodyear store and I've run MT/Rs with and without. Just don't have the shoulder blocks siped all of the way through.
12-08-2004 09:11 PM
braxton357 Then find a different shop to do it. Shops that sell semi tires and retreads typically do, and they'll know what they're doing...
12-08-2004 08:49 PM
91ghostoy Don't waste your time or money. The biggest problem I have seen with sipping your tires is that the kid who is doing the siping has no idea what he is doing and I have seen a set of tires get shredded on the trail because they were sipped to deep and the store that sold the tires wouldn't replace them because the tires were used "off road". Don't waste your $$$$$$$$
12-08-2004 08:42 PM
porterwagner sipe em'. i did mine with a regular box knife and it sucked. it took me like an hour a tire. and i did two in one day, then didn't get to the other 2 until two months later!! i'd definitely pay to have a machine do it.
12-08-2004 06:23 PM
Bones The ones I have siped I go from one end of the tread block to the other about 1/4" apart from the last one. Try to keep them 1/4-3/8" deep and they always worked well that way. Takes a shiatload of time (utility knife) and a sharp knife and a warm/hot tire.
12-08-2004 04:11 PM
Indyguy Just leave 1/2" inch of the trailing and leading end of each lug unsiped and that should keep things from chunking. There is no reason NOT to sipe nobby tires, it just makes them so much nicer on a DD. I don't know why you would think the MT/R's are any different................ at the end of the day, they are just another on/off-road tire.
________
BLACK BBW
12-08-2004 03:08 PM
nwmud
Quote:
Originally Posted by reeser
goodyear WILL NOT warranty siped mt/r's

yes siping improves traction greatly, its your call on the warranty stuff.
I get ALL my tires from Discount Tire and buy the extended warrenty through them. They cover the warrenty not Goodyear thius way and they reccomend the siping. Of course they do the siping too. My tire warranty is good for the life of the tire no prorating like so many other places.
Plus they only sipe the center traction areas so that should cut down on chunking too.
12-08-2004 01:55 PM
DevinB
Quote:
Originally Posted by braxton357
...BUT can also cause chunking, thus lowering the tire life. Mtr's tread isn't really bulky enough to "chunk" anyway, other than maybe some corners.
My MTR's have chunked on me. That would be my only worry about siping, the increased chance of more chunking. Other than that, I'd go for it.
Devin
12-08-2004 01:17 PM
Schly
Quote:
Originally Posted by b2dude
i've always heard that siped tires last longer because they run cooler. seems to me that other than the warranty thing....there's no reason not to sipe. better traction, lasts longer, stops better, blah blah
I thought that siped tires ran HOTTER.
12-08-2004 12:56 PM
braxton357
Quote:
Originally Posted by b2dude
i've always heard that siped tires last longer because they run cooler. seems to me that other than the warranty thing....there's no reason not to sipe. better traction, lasts longer, stops better, blah blah

It does indeed help keep the tire cooler and helps tire wear...BUT can also cause chunking, thus lowering the tire life. Mtr's tread isn't really bulky enough to "chunk" anyway, other than maybe some corners.

Just get them siped, there really are no downsides for a dd.
12-08-2004 11:59 AM
jpdawg I've siped all of my tires for the last 3-4 years. No problems with any of the tires, including MTRs.
12-08-2004 11:57 AM
Dalec
Quote:
Originally Posted by reeser
goodyear WILL NOT warranty siped mt/r's

yes siping improves traction greatly, its your call on the warranty stuff.
This wouldn't be an issue if the tire store is the one doing the warranty.

Greater tread life is one of the Pros to siping. It increases the surface subjected to wear, reduicing the pressure on each point.

Do you have Discount Tire there? They were one of the first to do it, and seem to know why it is done. At least around here, they seem to know the most about tire tech.
12-08-2004 11:49 AM
b2dude
Quote:
Originally Posted by Sully
Would the wear-rates be different?
i've always heard that siped tires last longer because they run cooler. seems to me that other than the warranty thing....there's no reason not to sipe. better traction, lasts longer, stops better, blah blah
12-08-2004 11:46 AM
idahoxj
Quote:
Originally Posted by stRanger
how about some pics of siped MTR's as i will be gettin some soon and might be interested in siping them..
Youre kidding, right?
12-08-2004 11:44 AM
reeser goodyear WILL NOT warranty siped mt/r's

yes siping improves traction greatly, its your call on the warranty stuff.
12-08-2004 11:19 AM
Bones I started to sipe my 37's, but grooved them insread

I had some 33" TSL's and it did real well when they were siped. I'd say go for it. What can it hurt?
12-08-2004 11:17 AM
Sully
Quote:
Originally Posted by nwmud
I see responses explaining "TO SIPE" but no explainations as to why "NOT TO SIPE". Some insight would be helpfull.
Would the wear-rates be different?
12-08-2004 10:52 AM
rbaer Sipe them. I've used them both ways in exactly the same conditions and the siped tires always hooked better. Can't tell you diddly about ice and snow, though.
12-08-2004 10:46 AM
stRanger how about some pics of siped MTR's as i will be gettin some soon and might be interested in siping them..
12-08-2004 10:43 AM
nwmud I see responses explaining "TO SIPE" but no explainations as to why "NOT TO SIPE". Some insight would be helpfull.
12-08-2004 10:05 AM
nwmud
Quote:
Originally Posted by Malltero
Are you sure it isnt your alignment or suspension setup. My mtr's are one of the best tires I have used in the rain, I think they handle great on wet pavement. Ice and snow are another story though.

It's a bronco - the alignment is always Fawked up. I do have it pretty well aligned currently.
12-08-2004 09:51 AM
bigblack75Chev Ask Les Schwabs. LOL They do it and still don't know shit about it! I don't know if siping will help MTR's but it sure should. Every M/T tire I've had sipped has helped out tremendously in the rain, not to mention ICE, snow, rocks, and mud.
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