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tyre pressure
-> 206 Problems

#1: tyre pressure Author: kizza93 PostPosted: Sun Dec 23, 2012 1:27 pm
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what tire pressure should i be using i have low profile tyres 205/40/r17

#2: Re: tyre pressure Author: anton1989, Location: west midlands PostPosted: Sun Dec 23, 2012 3:33 pm
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i use 33

#3: Re: tyre pressure Author: novatron1_2, Location: fife PostPosted: Sun Dec 23, 2012 4:06 pm
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have a play using the standard pressure, higher pressures give an increase in handling until a pint when the tyre's contact patch is reduced

#4: Re: tyre pressure Author: LORDPSK, Location: CAERNARFON PostPosted: Sun Dec 23, 2012 5:42 pm
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Check with the tyre manufacturer for his recommendations

#5: Re: tyre pressure Author: HDI90, Location: sunny stoke PostPosted: Mon Dec 24, 2012 3:37 am
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all 206,s are 33

#6: Re: tyre pressure Author: anton1989, Location: west midlands PostPosted: Mon Dec 24, 2012 3:59 am
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HDI90 wrote:
all 206,s are 33

Regardless of wheel size? If you have the standard wheel that come woth the car it says on the car in the door part where the paint code is

#7: Re: tyre pressure Author: 138Andy, Location: Notts PostPosted: Mon Dec 24, 2012 6:24 am
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it will say on the wall of the tyre Smile

#8: Re: tyre pressure Author: Mattie-RS, Location: A Track near you ;) PostPosted: Mon Dec 24, 2012 7:06 am
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novatron1_2 wrote:
have a play using the standard pressure, higher pressures give an increase in handling until a pint when the tyre's contact patch is reduced

Does it?? Must have been doing it wrong all those times with lower pressure to increase in grip/handling

#9: Re: tyre pressure Author: bezford, Location: darlington PostPosted: Mon Dec 24, 2012 7:13 am
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32-34all day long.

#10: Re: tyre pressure Author: Mattie-RS, Location: A Track near you ;) PostPosted: Mon Dec 24, 2012 8:16 am
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23 fronts 25 rears Wink

#11: Re: tyre pressure Author: V9977, Location: Athens, Greece PostPosted: Mon Dec 24, 2012 9:52 am
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72 psi

#12: Re: tyre pressure Author: bezford, Location: darlington PostPosted: Tue Dec 25, 2012 5:35 am
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Howay stop pixxin about its 32 to 34...sorry for the lack of humour because sayin 25 and 72 must of been a joke..ha ha...not.

#13: Re: tyre pressure Author: Mattie-RS, Location: A Track near you ;) PostPosted: Tue Dec 25, 2012 9:09 am
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bezford wrote:
Howay stop pixxin about its 32 to 34...sorry for the lack of humour because sayin 25 and 72 must of been a joke..ha ha...not.

Sorry I must have forgot to laugh, hahahahahaha, No! that's what I actually run Wink

#14: Re: tyre pressure Author: macca1411, Location: Westhoughton, Lancashire PostPosted: Tue Dec 25, 2012 9:57 am
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138Andy wrote:
it will say on the wall of the tyre Smile

Where? Do all tyre manufacturers make 1 size of tyre to fit 1 make and model of vehicle?

You're getting confused with the maximum pressure marking.

#15: Re: tyre pressure Author: novatron1_2, Location: fife PostPosted: Thu Dec 27, 2012 5:52 pm
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Mattie-RS wrote:
novatron1_2 wrote:
have a play using the standard pressure, higher pressures give an increase in handling until a pint when the tyre's contact patch is reduced

Does it?? Must have been doing it wrong all those times with lower pressure to increase in grip/handling

That's interesting, I've always found the opposite, here's a good article:
www.modified.com/tech/...ewall.html

Part of it says:
How does a tuner manipulate tire loading and slip angle? By tweaking the spring rates, anti-roll bar rates, tire sizing and pressure, and to a lesser degree, the shock damping. The first option a tuner has is to increase the tire pressure. The harder a tire is inflated, within reason, the smaller slip angle it develops. In the case of a nose-heavy front-wheel-drive car, if you add several psi to the front tires and take some pressure out of the rear, the front tires will run a smaller slip angle while the rear tires' slip angle will increase. This alone can do quite a bit to reduce understeer.

So it's saying you can make the back 'looser' by running less pressure and make the front grip better by running more pressure.

#16: Re: tyre pressure Author: Mattie-RS, Location: A Track near you ;) PostPosted: Thu Dec 27, 2012 6:05 pm
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Having lower pressure means more contact with the road. Start low because once the tyres get warm increase in pressure due to heat will go to a optimum pressure. I run 23 front because I know it will end up at 26 psi
Running higher than that and it will increase even more and will overheat the tyre loosing grip and ruining the tyre

This is from Toyo tyres on the R888's

VEHICLE WEIGHT COLD PRESSURE HOT PRESSURE
Very Light < 800kg 17 - 22 psi 22 - 29 psi
Light 800kg - 1000kg 20 - 26 psi 24 - 32 psi
Heavy 1000kg - 1400kg 23 - 27 psi 28 - 40 psi
Very Heavy > 1400kg 27 - 35 psi 37 - 40 psi;



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