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Geloso calling,
I have just fitted to my Alfetta 2000 GTV a set of P6 Cinturato 195/60R 15 88V, manufactured May 2017. They replaced Dunlop Monza Tyres which I was happy with before they cured too hard. Comparison from memory to the Dunlop"s when new is that the Pirelli is a little heavy on the steering at low speed, however Highway driving no problems. I expect the new Pirelli ..tread pattern; somewhat like the Monza will be better in the wet. I will get the steering alignment checked as the +/- 1mm toe out, hand book specifications seems like zero at 110 kilometers. Cost for the P6 was $98.00 AUD each. All up when fitted and balanced $125.00 AUD per tyre. Deals can be found that claim 4 for the price of 3. I missed on that, should have shopped around. The built date on my GTV is 1983 and the original P6 Pirelli was still the spare but never saw much daylight. I had a tube fitted to the spare and it kept reasonable tyre pressure for many, many months.

Regards geloso.
































p6
 

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Discussion Starter #102 (Edited)
Geloso calling,
I have just fitted to my Alfetta 2000 GTV a set of P6 Cinturato 195/60R 15 88V, manufactured May 2017. They replaced Dunlop Monza Tyres which I was happy with before they cured too hard. Comparison from memory to the Dunlop"s when new is that the Pirelli is a little heavy on the steering at low speed, however Highway driving no problems. I expect the new Pirelli ..tread pattern; somewhat like the Monza will be better in the wet. I will get the steering alignment checked as the +/- 1mm toe out, hand book specifications seems like zero at 110 kilometers. Cost for the P6 was $98.00 AUD each. All up when fitted and balanced $125.00 AUD per tyre. Deals can be found that claim 4 for the price of 3. I missed on that, should have shopped around. The built date on my GTV is 1983 and the original P6 Pirelli was still the spare but never saw much daylight. I had a tube fitted to the spare and it kept reasonable tyre pressure for many, many months.

Regards geloso.
The fitment guide below is from my 1984 Pirelli book.



I would suggest that when Alfa moved from the 185/70R15 CN36 onto the P5 it would have made the steering very slightly heavier. Then when they moved onto the 195/60R14 P6 (& the 6" rim) that would have made the steering quite a bit heavier. As tyres get lower profile and more modern construction the width of the rubber in contact with the road in relation to the actual section width increases, giving more ultimate grip but at the expense of heavier steering and less progressive handling.

Maybe a slight hike in tyre pressure might lighten the steering a little. It is worth pointing out that faffing with tyre pressures is cheap and can help the handling of a car.

Also can i suggest that you shouldn't fit an inner tube in a 60% profile tyre

Dougal
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Davbert...thank you for picking up on my comments but the Alfetta 3.0 and SZ were specialist cars. The Alfetta 3.0 was a homologation model built only for the South African market for their race series to their specification so not stock compared to the usual alfetta gtv.
The SZ is uncomparable because its chassis was considerably reinforced compared to the previous gtv.

For the alfetta coupes for the road in 4 cylinder format alfa did all their testing when they developed the cars on the 165 section tyre for the berlina and the 185 section tyre for the coupe both on 14 inch rims and the suspension matched those tyres. All the road tests I have in period mention the Good Year G800 as the pick of the available tyres stock.
They switched to 15 inch rims and 195 section tyres only for the plastic fender GTVs in the early 1980s when they had also firmed up the suspension.
Increasing tyre width may increase grip but decreases acceleration (compared to a slimmer tyre of similar tread compound), decreases road comfort, and increases fuel consumption. For a road car I personally prefer the stock tyres and suspension compared to the modified suspension of other cars which seem too harsh of the ones I have sampled
the SZ suspension was unique. the 3.0 SA gtv is less so out side of the specially message carb drivetrain, wheels, hood, airdam. yes it was a homologated special for racing but still very much a standard alfetta for the streets chassis wise. like homologated special at the time 911 SCRS (only 21 units made) had standard street suspension knowing once they made to race teams the dampers and TB's will be binned and replaced.

it may or may not have different springs and bars but the geometry and pick up points are standard if memory serves. i have a magazine road test somewhere in the attic i havent seen in decades. i think it was Motorsports , an uk publication.

all things being the same, the very short diameter 205 50 15s will have a different ride height and roll center due to noticeably different rolling diameter compared to the 195 60 15. yes the dynamics you mentioned are compromises that well know and are correct. but im sure many see wider tires as an easy and worthwhile change to a means of a quicker car around the roads or cours hence some of the changes the later plasitc bumper cars put in. im just glad that these wonderful period correct cn36 tires are available again for the folks that want to return there cars back to stock.

all the best!
 

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Its allright that CN36 could be used on the Alfetta range, many others can also be used.

But there is no reason to fit these tires on this range of cars just in order to be time correct for the seventies. CN36 was almost not used on the Alfetta series. In the size 185/70 HR 14 these brands were fitted: CEAT, Continental, Good Year, Michelin. My Alfetta GTV2000 I remember had Goodyear and the GTV6 2,5 had Pirelli P6.

Not a big deal this, but if time correct tyre is the intention, better check your user manual as time correct tyres are listed there! And then see what is available today!

G.
 

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Discussion Starter #105
Hi

In the size 185/70R14 i think the only classic tyres are:-

https://www.longstonetyres.co.uk/catalog/product/view/id/1411/s/185-70vr14-pirelli-cinturato-cn36/category/9024/

or

https://www.longstonetyres.co.uk/catalog/product/view/id/1959/s/185-70vr14-michelin-xas/category/9024/

I think the XAS was OE. Michelin XAS tyres are also great. I love them. I have had a few cars on them. I have also driven an Alfa Spider on the XAS 165R14 and it was fantastic. miles better than the tyres we took off.
 
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