Technical Cinq's wheel/tire sizing question

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Technical Cinq's wheel/tire sizing question

petrechu

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Hi guys.

I have just read this exhaustive tyre/rim bible page
http://www.carbibles.com/tyre_bible.html
and have gained some knowledge about tyre/rim sizing and compatibility.
But, to be more sure in my choice, I want to ask for the advice of those of you who are aces in tyre/rim adjustments.

I have to change rims on my non-sporting Cinq (as the old ones are all bent and noone could give them the usual round shape, which would be very helpful for the overall car shaking problem).

According to the following web-site
http://atschool.eduweb.co.uk/ajwebster/tune7.html
"if you are fitting wider wheels to a standard non-sporting Cinquecento a lowering kit must be added as part of the upgrade, this is a Fiat recommendation and will avoid any sharp-cornering (elk test) induced rollover problems similar to those suffered by early Mercedes A-class cars."

It also states that
"The manufacturers standard fitment is :
Tyre 165/55X13 Wheel 5.5X13 Offset 29mm "

My Cinq currently has tyres of 145/70x13 Wheel 4.0x13, unknown offset (probably 29mm??).

What i would like to do is to fit my current tyres (145/70x13) on 5.5x13 offset 29mm wheels, which seems to be allowed by using the calculator on the
http://www.carbibles.com/tyre_bible.html
web-site (search for "An ideal rim-width calculator" on the page).

The question is: is the Tyre 165/55X13 Wheel 5.5X13 Offset 29mm really the standard fitment (as stated on the web-site mentioned above)?

If it is, then I guess my choice of fitting 5.5x13 wheels would be "standard" (not too wide) and would be approved without adding a lowering kit and nothing unexpected would happen by just changing the rims.

Your help is greatly appreciated.
 
165/55 is the standard Sporting fitment
145/70 is the standard Non Sporting fitment.

If you are fitting 5.5 inch wide wheels to a non Sporting Cinq then you should lower the car to avoid the 'elk test' problem. I personally would not fit 145/70 tyres to a 5.5 inch rim.
 
Too bad :confused:

OK, maybe it doesn't seem to be a good idea, but I'm just looking for a simple solution to the rim replacement problem.

So, should I consider that NO other wheel sizes can be safely applied without lowering the car?
 
petrechu said:
So, should I consider that NO other wheel sizes can be safely applied without lowering the car?

Better to be safe than sorry IMO. :)
 
The problem #1 is that I am located in Georgia, Tbilisi. Do you know where that is? :) Cinq's have been around for like, 2-3 months and I could hardly find even the basic parts like thermostat.
If I am to upgrade my shockers and springs, I will have to pay a huge amount of money (for buying on ebay and asking them to send it through DHL).

Anyway, I really do not look forward to making my Cinq a sporting monster; rather I would like to keep it simple in decent condition.

For this time, I need to have rims replaced for a nasty reason: no one could give them a normal, round shape and the car goes jumping up and down.

Can you suggest if any other cars (like Fiat Uno or Panda? or maybe some Seats?) have their standard rims sized 13x4?

Thank you.
 
custard boy said:
are uno's and panda's more common?least you could get some steel rims to get you moving

Unos and Pandas and Puntos (not Centos) are more common.

custard boy, what do you mean by saying I could get some steel rims to get me moving? You mean those of some other Fiats?
 
petrechu said:
The question is: is the Tyre 165/55X13 Wheel 5.5X13 Offset 29mm really the standard fitment (as stated on the web-site mentioned above)?

If it is, then I guess my choice of fitting 5.5x13 wheels would be "standard" (not too wide) and would be approved without adding a lowering kit and nothing unexpected would happen by just changing the rims.

Your help is greatly appreciated.
No, on a Cinq Sporting the off-set is 30.5mm as its stamped on the wheel, can't comment on a non-sporting model but as the wheels are interchangeable I would use the 30.0mm off-set on a 5 1/2" wide wheel as your basis.

As others have said, on a non-sporting model you need to lower the car, even if is by fitting sporting model springs which I believe are 20mm lower, this is a cheap and hopefully easier option for you in tracking them down due to your geographical location.

Aaron.
 
OK guys, you have convinced me to go searching for the same sized (13x4) wheels by saying that I would have to lower the suspension in order to apply wider rims.

Just one more thing (just to know); what if I use 13x4 wheels with high profile tires (which have bigger overall radii). I understand that I would have a speedometer error. What about performance/car stability/fuel economy? (I might have to change tyres too. Don't think that I like going the odd way. I may not be able to find appropriate wheels/tyres).
 
petrechu said:
Just one more thing (just to know); what if I use 13x4 wheels with high profile tires (which have bigger overall radii). I understand that I would have a speedometer error. What about performance/car stability/fuel economy? (I might have to change tyres too. Don't think that I like going the odd way. I may not be able to find appropriate wheels/tyres).

This would be very unlikely to have a speedo error when using the same sized i.e. 13'' even though the tyre could be higher profile. Maybe if the trye you were interested in was 14'' or 15'' then maybe speedo erors will occur.

Fuel economy i dont think would suffer either.

Stabilty, im gathering you mean handling depends on your budget on tyre. Some are different to others. If you get a cheap tyre then it probably wont be as good

HTH
 
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