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Location:
Kita-Ku, Sapporo, Japan
Registered:
January 2003
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Re: why don't i loose traction?
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Thu, 27 October 2005 02:52
 
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| Norbie wrote on Thu, 27 October 2005 11:19 |
Actually wider tyres have the same size contact patch as smaller tyres; the only thing that changes is the shape of the contact patch.
The contact patch area is influenced by two factors only:
- the force exerted on the tyre
- the tyre pressure.
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yup 
and tyre grip is a complex thing.
there are maybe 3 main components.
chemical grip (bonding to the road) but this is not really big for road tyres,
pure friction coefficient between the areas in contact,
and lastly, grip due to deformation of the rubber into the "terrain" of the road surface, which is never perfectly smooth.
larger surface area = lower force per unit area, and this results in less deformation of the tyre surface into the road "terrain" (i forgot the proper word for the measure of roughness;))
although as Norbie said, the actual contact patch may be the same... hmmmmm.. need more thinking....
ok.. say you have a 6" tyre and a 10" tyre at same pressure, will the 6" tyre have exactly the same area in contact with the road? i confess i do not know enough to calculate pneumatic loading or such....
hmmm.... there is a point at which a tyre will start to lose grip because you are going from a situation where rubber contacts _most_ of the road surface, to a situation where the rubber only contacts the high points of the road surface..
for wet surfaces, larger surface area = less grip, and so is the case for ice...
and my personal experience was that 215's on an old corolla are dangerous, but 185's had more grip than 175's (but alas they were all shitty tyres)..
i dunno 
anone want to ask the tyre companies whats what?
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| | Subject | Poster | Date |
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why don't i loose traction?
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ndgcpr | Wed, 26 October 2005 13:23 |
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Re: why don't i loose traction?
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draven | Wed, 26 October 2005 13:25 |
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Re: why don't i loose traction?
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Norbie | Wed, 26 October 2005 13:27 |
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Re: why don't i loose traction?
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rthy | Wed, 26 October 2005 13:30 |
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Re: why don't i loose traction?
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allencr | Wed, 26 October 2005 15:09 |
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Re: why don't i loose traction?
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devolutio | Wed, 26 October 2005 23:11 |
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Re: why don't i loose traction?
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rthy | Thu, 27 October 2005 05:51 |
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Re: why don't i loose traction?
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mic* | Wed, 26 October 2005 23:02 |
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Re: why don't i loose traction?
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oldcorollas | Wed, 26 October 2005 23:19 |
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Re: why don't i loose traction?
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devolutio | Wed, 26 October 2005 23:35 |
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Re: why don't i loose traction?
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vanguard | Thu, 27 October 2005 01:17 |
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Re: why don't i loose traction?
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ndgcpr | Thu, 27 October 2005 09:22 |
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Re: why don't i loose traction?
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ndgcpr | Thu, 27 October 2005 09:20 |
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Re: why don't i loose traction?
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« RČ» Blinky | Fri, 28 October 2005 02:05 |
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Re: why don't i loose traction?
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oldcorollas | Fri, 28 October 2005 03:14 |
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Re: why don't i loose traction?
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mic* | Wed, 26 October 2005 23:43 |
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Re: why don't i loose traction?
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KLR16V | Thu, 27 October 2005 00:38 |
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Re: why don't i loose traction?
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WYSIWYG | Fri, 28 October 2005 17:15 |
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Re: why don't i loose traction?
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terra | Thu, 27 October 2005 01:08 |
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Re: why don't i loose traction?
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Norbie | Thu, 27 October 2005 01:19 |
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Re: why don't i loose traction?
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oldcorollas | Thu, 27 October 2005 02:52 |
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Re: why don't i loose traction?
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oldcorollas | Thu, 27 October 2005 03:33 |
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Re: why don't i loose traction?
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hokey | Fri, 28 October 2005 04:11 |
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Re: why don't i loose traction?
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monkeymajik | Thu, 27 October 2005 03:59 |
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Re: why don't i loose traction?
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dingaling | Thu, 27 October 2005 04:27 |
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Re: why don't i loose traction?
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Mookie | Thu, 27 October 2005 04:44 |
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Re: why don't i loose traction?
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ajmor6 | Thu, 27 October 2005 05:11 |
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Re: why don't i loose traction?
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myne | Thu, 27 October 2005 06:33 |
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Re: why don't i loose traction?
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rthy | Thu, 27 October 2005 06:36 |
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Re: why don't i loose traction?
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Stefan | Thu, 27 October 2005 07:00 |
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Re: why don't i loose traction?
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mic* | Thu, 27 October 2005 23:38 |
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Re: why don't i loose traction?
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justcallmefrank | Fri, 28 October 2005 05:12 |
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Re: why don't i loose traction?
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justcallmefrank | Fri, 28 October 2005 05:14 |
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Re: why don't i loose traction?
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hokey | Fri, 28 October 2005 06:22 |
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Re: why don't i loose traction?
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WYSIWYG | Fri, 28 October 2005 17:22 |
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Re: why don't i loose traction?
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Phrostbyte | Sat, 29 October 2005 14:22 |
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Re: why don't i loose traction?
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havabeer | Sun, 30 October 2005 09:32 |
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Re: why don't i loose traction?
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oldcorollas | Sun, 30 October 2005 09:36 |
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Re: why don't i loose traction?
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Norbie | Sun, 30 October 2005 14:06 |
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Re: why don't i loose traction?
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ajmor6 | Mon, 07 November 2005 22:27 |
