Tyred

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red leo

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Tyred

Postby red leo » Thu Jul 06, 2006 10:56 pm

Put my new Hankook's on the rears a week ago, selected for their allround capabilities. Big diffrences the ride is much more compliant no major jolts and bumps as before. There is always a "but" the back end has become very light and tends to wander at anything over 80, high wind over the Medway bridge this morning caused serious grief. I think I might need to lower the suspension, or do you think I have inadvertantly ended up with hard compound on the fromt and softs on the rear a sort of Rossi set up. :lol: Any thoughts
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Postby stephendell » Fri Jul 07, 2006 12:01 am

Have you got the tyre pressure right?
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Postby darrenbiggs » Fri Jul 07, 2006 8:46 am

Yep tyre pressure's got to be the first port of call.

Don't set it too high ie the high speed pressure - you'll never be doing 150 round the M25.

Oh and invest in a decent digital tyre pressure gauge. It'll pay for itself as getting the tyre pressures correct makes a lot of difference to how fast they wear.
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Postby simontaylor » Fri Jul 07, 2006 9:00 am

Of all places, "Hell-fords" do a nice one, about £15 but make sure you get the one that reads Bar & PSI.
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Postby darrenbiggs » Fri Jul 07, 2006 9:14 am

Yep that's where I got mine.

Mine's PSI only though so I have a sticker on the back where I've written down the preferred pressures for front and rear.
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Postby Alpineandy » Fri Jul 07, 2006 12:15 pm

darrenbiggs wrote:Don't set it too high ie the high speed pressure - you'll never be doing 150 round the M25.


Simon, please ignore this coment... :lol:
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Postby simontaylor » Fri Jul 07, 2006 12:53 pm

LOL :D
But not at the times I use it :cry: :cry:
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Postby darrenbiggs » Fri Jul 07, 2006 1:15 pm

Yes I was talking about rush hour where you'd be lucky to see 15 mph.

I honestly don't know anyone who re-sets the pressure though for high speed driving.......... or do you Simon? :lol:

In all seriousness those pressures are far too high for normal use though.

For 225 section rears the manual states 2.5 bar (36psi) for normal speeds and a whopping 3.6 bar (52psi) for high speeds / loads. If the tyre fitters used these values you'd have tyres like rocks.

I'd try about 32-34 psi on 225s as see how it feels.
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Postby red leo » Fri Jul 07, 2006 4:31 pm

I thought my conversiion was wrong 36 seemed very high, and the tyres taken off were worn centre but not so much at the edges so I will up the pressure.
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Postby Alpineandy » Fri Jul 07, 2006 7:10 pm

red leo wrote:I thought my conversiion was wrong 36 seemed very high, and the tyres taken off were worn centre but not so much at the edges so I will up the pressure.


Worn in the centre of the tyre means the pressure is too high.
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Postby Juzzblack » Fri Jul 07, 2006 8:55 pm

I think I recall some one saying even at correct pressure, relatively wide tyres will wear in the middle anyway due to the middle bulging out under acceleration. :?:
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Postby simonsays74 » Fri Jul 07, 2006 10:17 pm

Alpineandy wrote:
red leo wrote:I thought my conversiion was wrong 36 seemed very high, and the tyres taken off were worn centre but not so much at the edges so I will up the pressure.


Worn in the centre of the tyre means the pressure is too high.


what have i been saying about have-a-go-mechanics :lol: :lol: :lol:
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Postby peterg » Fri Jul 07, 2006 11:11 pm

simonsays74 wrote:
Alpineandy wrote:
red leo wrote:I thought my conversiion was wrong 36 seemed very high, and the tyres taken off were worn centre but not so much at the edges so I will up the pressure.


Worn in the centre of the tyre means the pressure is too high.


what have i been saying about have-a-go-mechanics :lol: :lol: :lol:


You are such an Irish misery :lol: !!!!! Have a go mechanics is how plenty of people learn to become competent....as for tyre pressures a lot of that is down to preference. I run mine at 25 front and 30 rear for road use and down as far as 16 and 18 for events and have had no trouble.....my times have generally improved the lower Ive run them and theyve not come off the rim....get something more important to worry about....tyre pressures depend on conditons! At Barbon my tyres went up over 2PSI when used. You presumably have yours set at the same rate all the time??? :roll:
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Postby Alpineandy » Sat Jul 08, 2006 11:06 am

simonsays74 wrote:what have i been saying about have-a-go-mechanics


Are you suggesting that this universal understanding which was passed to me by a 40 years of experience mechanic is incorrect :?:
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Postby LiamMcShane » Sat Jul 08, 2006 11:53 am

Alpineandy wrote:
simonsays74 wrote:what have i been saying about have-a-go-mechanics


Are you suggesting that this universal understanding which was passed to me by a 40 years of experience mechanic is incorrect :?:


I think he was referring to red leo! :roll:
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