Mixing Tire Sizes - Alfa Romeo Forum
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(Post Link) post #1 of 8 Old 12-03-04 Thread Starter
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Mixing Tire Sizes

A friend of mine who races a 911 is changing classes so has offered to give me his old race tyres for my 75

I have these spare alloys

http://www.lewebdesconducteurs.com/e.../arriere_2.jpg

Is it possible to stick 205/50/R15 tyres on the front, 225/50/R15 tyres on the back?

Even if it was possible, would it be a dangerous thing to do? Seeng how tailhappy the car is, I thought it might be a good thing

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Re: Mixing Tire Sizes

225/50x15 tyres need a rim width of between 6" and 8".

7" is the recommended size - the wider the rim the harder the side wall will be.

If the tyre will fit I don't see any problems with fitting the wider and larger diameter tyres on the back. This can be a problem with cars with ABS so the 75 should be OK.

This should give you less oversteer and most performance RWD cars run wider tyres on the rear.
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Re: Mixing Tire Sizes

Sounds like you'll be ok as long as you don't get a flat tyre!
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Re: Mixing Tire Sizes

SZ/RZ (based on 75 chassis) have 205/55/16 fronts on 7'' rims and 225/50/16 rears on 8'' rims. No problems with punctures with a space saver spare.

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Re: Mixing Tire Sizes

Jonathan, rule with that generally is that you can mix different axles OK, but don't mix on the same.
Who races 911's? Does he do in in Mondello? May know him.
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Re: Mixing Tire Sizes

looking for any parts taz?
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Re: Mixing Tire Sizes

Well, I havn't acually broken anything on it yet but give me time

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Re: Mixing Tire Sizes

Quote:
Originally Posted by McGuinn
Jonathan, rule with that generally is that you can mix different axles OK, but don't mix on the same.
Who races 911's? Does he do in in Mondello? May know him.
He's called Robin Titterington, but I don't think he races in Mondello.

The car's quite famous apparently, been going around for years with various owners.

http://www.ifgclub.com/gallery/galle...&box=&shownew=

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