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Join Date: Aug 2001
Location: UK
Posts: 219
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Uni-directional tyre rotating wrong direction
What are the dangers of running a uni-directional tyre in the wrong direction, in other words, rotating it in the opposite direction?
Bridgestone, on their website, says: "Helps expel water more rapidly, reducing the risk of aqua-planing" Is aquaplaning the only problem? |
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07-24-2003, 01:22 PM
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Join Date: Nov 2002
Location: Arlington, VA
Posts: 1,045
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more noise possibly, creating more heat, faster wear......
Axial rotation of the earth decreases as well 
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Charlie Stylianos 1982 SC Targa www.Dorkiphus.com - (The Land of the NoVA/DC/MD Porschephiles) |
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07-24-2003, 01:37 PM
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Join Date: Feb 2000
Location: Dallas, TX
Posts: 4,612
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Well if water flow towards the outside of the tire in one direction, I would assume that it flows towards the center of the tire in the other direction. I wouldn't want to drive that care when it rains.
Rotate the wheels from one side of the car to the other.
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Neil '73 911S targa |
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07-24-2003, 01:42 PM
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Location: Los Angeles
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I had this problem on my car for more than 2 years, and it wasn't a problem.
It has to do with the way the belts are lapped, but it doesn't make a darn bit of difference as far as I can tell. DON'T try and flip it if you've put miles on it already. If it's, like, a day or two before you notice, you can still wear it in properly - assuming you don't drive more than 100 miles in a day. |
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07-24-2003, 01:42 PM
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The Unsettler
Join Date: Dec 2002
Location: Lantanna TX
Posts: 23,885
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I've been told that driving the tire in the wrong direction can cause it to "unwrap".
Obviously backing up does not count as "driving". It's just what I've heard and have no data to verify or deny it so please no flames. I am posting it as a reponse because I would not mind knowing whether or not it is true. Regards, Scott
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"I want my two dollars" "Goodbye and thanks for the fish" "Proud Member and Supporter of the YWL" "Brandon Won" |
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07-24-2003, 02:19 PM
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Location: UK
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Well, soon enough we'll know what the effect is, if any at all. I'm driving a long distance over the weekend and will be doing so every weekend for the next couple of months. Relatively high speed, relatively poor surface. By the time the wet season starts it will be time for a new set of tyres anyway. I'm not going to the effort of changing the tyre around if it's only going to last a few months anyway.
It's a front tyre so at least the load isn't high, except perhaps under hard braking. I'll keep you guys posted, if you are interested. |
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07-25-2003, 12:33 AM
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Join Date: May 2001
Location: Peoples Republic of Long Beach, NY
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I read somewere that it's only a rain thing.......Ron
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Ronin LB '77 911s 2.7 PMO E 8.5 SSI Monty MSD JPI w x6 |
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07-25-2003, 09:20 AM
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Hmm, seems like you're playing with fire. So, if you get burned, no whining! LOL
But seriously. Why not just change it. Probably cost about $10 to have it remounted and ballanced. Or whatever you use over there 
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"I understand that you want to drive fast, it's just that I want to go faster!" Move ova please Chad aka "Chili" 1974 Base coupe in Carrera outfit. No A/C, no Sun Roof, no power windows. Fast and light, just the way I like it. (Sad to say, it's sold. But at least it remains with us on this board.) My car http://www.pelicanparts.com/gallery/CHILI 1969 RSR Project. Heavy on the word PROJECT! No pictures yet. Keeps breaking lenses of cameras. |
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07-25-2003, 01:01 PM
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Information Junky
Join Date: Mar 2001
Location: an island, upper left coast, USA
Posts: 73,189
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Quote:
A directional tread pattern is designed to move water out of the way.
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Everyone you meet knows something you don't. - - - and a whole bunch of crap that is wrong. Disclaimer: the above was 2¢ worth. More information is available as my professional opinion, which is provided for an exorbitant fee. 
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07-25-2003, 01:49 PM
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Back in the saddle again
Join Date: Oct 2001
Location: Central TX west of Houston
Posts: 55,981
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The owner operator of Traquest who frequents Rennlist, and has lots and lots of track time says he has done it several times with no problems.
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Steve '08 Boxster RS60 Spyder #0099/1960 - never named a car before, but this is Charlotte. '88 targa  SOLD 2004 - gone but not forgotten
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07-25-2003, 02:12 PM
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Location: UK
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Just returned from a long trip with the tyre facing the "wrong" way. High speeds, bad roads. Had to brake hard a few times. No problems thus far.
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07-27-2003, 10:25 AM
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1974 Porsche 911 2.9
