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Regional Representative, For United Arab Emirates
1991 Spider Veloce S4, 2003 156 GTA, Abarth 695 Tributo Ferrari
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Discussion Starter #1
Guys,

I'm on 47k in my GT and I've just had to put my second set of tyres on, :cry: not 'appy.

I had Pirelli P-Zero Rosso's 225/40/18's on from new, put another set on about a year ago. The garage told me they'd been over-inflated and worn because of this. They told me to keep the pressures at 32 psi, which I've tried to maintain but was told that this second set have worn unevenly due to over-inflation!

After ringing around, I got some Kenda's which I've been told by various sources are a good tyre and a harder wearing rubber than the Pirelli's. They seem to have a good tread pattern, are rotational and cost £300 for the set. I noticed a big difference in this weather already, having more grip than my near bald Pirellis!!

They've put 32psi in these but told me to get them checked by a tyre specialist when I want air in them as the usual Tesco/Asda/Shell garage's machines obviously aren't caibrated and could be putting anything in.

My question is...anyone else with 18" tyres, have you had similar problems and what pressures do you use please??

Thanks.
 

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They told me to keep the pressures at 32 psi
Too low.
Normal Pressures are:
Front: 2.5Bar (36PSI)
Rear: 2.4Bar (35PSI)

Full Load pressures are:
Front: 2.8Bar (41PSI)
Rear: 2.7Bar (39PSI)
 

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Too low.
Normal Pressures are:
Front: 2.5Bar (36PSI)
Rear: 2.4Bar (35PSI)

Full Load pressures are:
Front: 2.8Bar (41PSI)
Rear: 2.7Bar (39PSI)
as you said on the thread above;)
 

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Regional Representative, For United Arab Emirates
1991 Spider Veloce S4, 2003 156 GTA, Abarth 695 Tributo Ferrari
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433 Posts
Discussion Starter #5
Well that's even more interesting, as I used to keep them around 36psi on front, but was told 32psi when they'd worn due to over-inflation. Now I'm completely discombobulated!!
 

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yeah 32 is std practice for tyre fitters, ignore that and always refer to the owners manual.
 

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how many miles did you get from a front pair?

I use f39/r36
 

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Regional Representative, For United Arab Emirates
1991 Spider Veloce S4, 2003 156 GTA, Abarth 695 Tributo Ferrari
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Discussion Starter #8
Wow!! I'm gonna up my pressures then. I only got 26k approx from the fronts......not what I'm used to!!
 

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tyre pressure

you never said what part of your tyres had worn the most if its middles with loads of tread left on edges that indicates to high a pressure if middle like new but edges are worn not enough pressure but anything over 20k is brilliant on fronts i only get about 6-7k but alfas knock off inner edges of front tyres as standard my 147 has been lowered but did it before it was lowered alfa seem to run very negative camber on front suspension i run my pressure at 38psi front 36psi rear hope this all makes sense
 

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Wow I get 10k max out of mine on the front very even wear as well

run -2 camber
 

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...but alfas knock off inner edges of front tyres as standard my 147 has been lowered but did it before it was lowered alfa seem to run very negative camber on front suspension...
It is having too much toe-out on the front that rips through the inner edge, not the camber.
Set the front toe to 0mm and they will be fine.
 

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you also need to get a 4 wheel alignment when you lower it, or you will exaggerate the wear that already exists:thumbs:
 

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+1
 

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i have had 4 wheel alignment toe is set at 0 but its not just the toe that wears inner edge it is the camber angle the amount the top of the wheel leans tilts inward which you cant adjust on alfa 147/156 any ideas would be very helpful cheers
 

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i have had 4 wheel alignment toe is set at 0 but its not just the toe that wears inner edge it is the camber angle the amount the top of the wheel leans tilts inward which you cant adjust on alfa 147/156 any ideas would be very helpful cheers
The -ve camber has very little effect on inner edge wear unless the camber is very excessive, which it isn't.

As long as you set the front tracking to "0" (which had been the official Sportpack/Veloce setting from mid 1999) then the tyre wear will be even across the tread.
Rear should still be set to 3mm toe-in.
 

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I'm currently running 36 front and 34 rear on my 147 with 215 40 18's on,but looks like I'm going to up it slightly.
Book pressures for a 147 with 215/40R18 are:
2.4Bar front & rear for normal loads

or

2.7Bar front & rear for full loads.
 

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Hi sorry to bring up another question, I have read through nearly all the threads about this.

I have a 147 which has been lowered by 30mm with shocks and springs.
The inside of my tyre seems to be wearing (Have just set the tyre pressures to 2.4 bar)
Its on 18" ducati corse alloys with 215/40/18 tyres

Am I right in thinking that the front toe should be set to 0 and the rear to 3mm Toe-In?

Thanks Ben.
 
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