Tire question: "Severe weather" snowflake/mountain logo....

Martinjmpr

Wiffleball Batter
Just curious, but the "severe weather" snowflake/mountain rating thing....where does that come from? I just bought a set of tires and since I live in CO and my 4runner is my primary "bad weather" vehicle I wanted to get a tire with the "snowflake" rating (my DD is a 2wd mini truck - TERRIBLE on snow and ice.) I ended up sticking with the tried-and-true BFG AT KO (not the K02 as they are not out yet in 265/70/17) and they do have the snowflake rating (though oddly enough, neither the BFG web site nor the Discount Tire web site indicates that they do.)
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IOW, is there some independent body out there that says that in order to bear the rating the tire has to meet certain qualifications, or is it something that each tire company "self certifies?" If the tire manufacturer had to submit their tires to an independent body that would certify them based on objective criteria, then I could see it having a lot of value but if it's a "self certification" then I'm not sure it means more than "this tire is better in snow than our other tire that doesn't bear the snowflake symbol" but not much more.
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So, does it really mean anything? I suppose if a manufacturer "self certified" a "severe weather" rating and the tire got a reputation as a poor performer in the snow, the company's reputation might suffer, so that would be an incentive for the companies to be "honest" in their ratings. But beyond that, does it really signify anything? Or is it more of a marketing ploy?
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Discuss....
 

SLC97SR5

Observer
http://www.snowtyres.com.au/severe-service-emblem

In order to meet this standard, tires must be tested using an American Society for Testing and Materials (ASTM) testing procedure described in “RMA*Definition for Passenger and Light Truck Tires for use in Severe Snow Conditions”. Tires designed for use in severe snow conditions are recognized by manufacturers to attain a traction index equal to or greater than 110 compared to the*ASTM*E-1136 Standard Reference Test Tire when using the*ASTM*F-1805 snow traction test with equivalent percentage loads.
 

digitaldelay

Explorer
Mountain/Snowflake tires are definitely worth it in winter conditions, however don't expect miracles on the 2wd minitruck in terms of acceleration. Nothing short of chains, sandbags and/or a locking diff really make much improvement. Steering and stopping is much improved though!

Martin, you may also want to check out the Nokian Rotiiva AT, available at A&J Tire Factory.

http://www.tirefactory.com/aj/Product-Details/NT428206

Jason
 

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