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This is a reason to endanger the lives and property of those who share the road with you?
Or he could do what most people do and change driving styles.
I am also not convinced that snow tires improves safety across groups of people (fatality wise anyway as I haven't seen a study that shows fatalities go down with winter tires (there could be but I haven't seen one))
Most people drive as fast as what feels safe. My experience is that people with all-season tires drive slower than people with snow tires. Fatalities probably go down since fatality rates are low at low speeds. (Again I havent seen any studies one way or the other though).
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Or couldn't you find storage space for a
set of Snobootz?
Ive seen you recommend these several times recently on this forum as a solution; they are not.
For one, they dont even make them in our 17" tire size
For two, they dont really improve safety. If you actually read the independent testing papers (actually paid for by the company but done independently at a university in my state) its pretty clear that they are unsafe for FWD cars. The brake balance between front and rear is too far off and the rear loses it when braking. They also found that the cleat spacing is too wide; one side of the car can grab while the other side 'misses' the cleat which puts a torque on the car and induces a spin. (Braking distances tend to be shorter but not necessarily safer).
They did show however that they are effective in accelerating the car. So basically you can get up to speed faster but your braking is still dangerous. Think about that.
If you could buy a set of four (which you cant for our size) you could get a set of four and negate some of the above effects.. but that's cost prohibitive at $440. At that price there are far better options.
You also mention in another post that they are effective in loose snow. They were never tested in loose snow in the tests provided by the company; the test environment was all packed. Consumer reports did test them in loose snow and they came to the conclusion that they dont improve traction over all seasons.
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On ice, most all-season tires, which are made with very hard rubber compounds to get very high treadwear numbers (due to the priorities of the people to whom they are marketed), generally have worse traction than non-all-season tires, which usually have softer tread compounds.
As ive tried explaining this to you in the past numerous times...(http://forum.mazda6club.com/index.php?showtopic=113590) this is not true.
Im not going to try and explain why this is again for you (eg. glass transision temps, hyrophilic tread compounds, hysteresis, ect.)
Instead look at tireracks testing for a more black and white example.
http://www.tirerack.com/tires/tests/testDisplay.jsp?ttid=80Tires on ice:
Higher number is better
Max Performance Summer Wear Rating:
140 Total Score :
62 (Accel, Stop, Corner)
UHP All Season Wear Rating:
400 Total Score :
75 (Accel, Stop, Corner)
All seasons usually perform better on ice than summer tires... not the other way around.
Ive personally confirmed this with my summer UHPs
And another test they performed
http://www.youtube.com/watch?v=GlYEMH10Z4sQUOTE
Similarly, on frozen dry pavement, a non-all-season tire (excluding the very small market segment designed for high temperature summer driving at high speed -- sometimes called "extreme performance" tires) with its softer tread compound, generally has better traction than a hard-compound all-season tire.
Again Im not going to try and explain this to you again (http://forum.mazda6club.com/index.php?showtopic=113590) but summer tire traction tends to significantly go down at lower temperatures way before all seasons.
Read tirerack article provided above and they briefly cover this also.
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There is a pretty strong inverse correlation between ice traction and the treadwear number
As I showed you above... there isnt.
There could be if you look in the same 'class' of tire.. but I haven't seen any data on this.
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but no tire that is acceptable in the summer months is competent on ice unless it is fitted with chains; only true winter tires -- or tires fitted with chains or Snobootz -- should be driven on ice).
Um no.. Running summer tires in winter is dangerous. Remember when I tried explaining the concept of the glass transition temp in another post? Well when one fully goes into the region summer tires can crack in extreme cold. On top of that most chains dont purely rely on the chain, they still expose a large tire contact patch, and as covered above summer tires do not function as well as other tire treads in the cold.
Further more its illegal to chain summer tires in some states for the reasons above.
As for snobootz... I already covered those above.
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True winter tires are made with special tread compounds that stay soft even at very low temperatures, and that is why they are the best tires on ice; but those tread compounds are very, very different from the tread compounds found in all-season tires.
Implying that non winter tires don't stay soft at low temperatures when cold? Your view has changed since our last discussion, which is fine (http://forum.mazda6club.com/index.php?showtopic=113590). Glad to hear it. It would have been nice of you to tell me this instead of abandoning the last discussion without notice after being kinda rude.
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Of the three categories of tires under discussion, the wet traction capabilities of non-all-season tires are best, followed by the wet traction capabilities of winter tires. All-season tires come in third (last).
Actually the wet traction capabilities of summer tires are comparable to 'good' all seasons except for a couple select summer tires at 'normal' temps according to testing available at tirerack on tires available for the 6. Also the wet traction abilities for winter tires fall when temperatures increase... All seasons are better in 'warm' conditions than winter tires in respect to wet traction (performance winter tires would be close to all seasons).
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What you have noticed about the Yokohama YK-520 -- slipping too easily on wet roads -- is the norm for all-season tires.
No... 'good' all seasons have very comparable wet traction to most summer tires, at normal temps, when the wear ratings aren't at the extremes according to testing available at tirerack on tires available for the 6