69 us gtv - more questions about tires and wheels... - Alfa Romeo Bulletin Board & Forums
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post #1 of 20 (permalink) Old 01-31-2016, 08:35 AM Thread Starter
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69 us gtv - more questions about tires and wheels...

I just bought a 69 GTV and need new tires. I want to take the opportunity to get the Alfaholics 15 x 7 super leggera wheels. The car has been lowered- not sure how much but not radically so. My question is- will 205/50 tires rub? 205/55? Apologies if this is covered elsewhere- i tried to find all the threads and was not able to get a clear answer. I did learn about other tradeoffs associated with the various tire sizes and the effects on steering component etc. I am mainly concerned whether or not the tires will rub. The Alfaholics guys were not sure. If possible I'd like to go 205/55.
Thanks.
Dave

Current: 69 GTV, 2019 Stelvio, 95 Porsche 968 cab
Past 74 GTV, 69 GTV, 74 Spider
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post #2 of 20 (permalink) Old 01-31-2016, 10:03 AM
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Is it a stepnose or non-stepnose? The early cars have different rear fender arches and have less clearance.

Here is our car on 205/55 15 with a 15x7 et30, lowered about an inch, no rubbing whatsoever.......

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post #3 of 20 (permalink) Old 01-31-2016, 11:05 AM Thread Starter
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It is not a step nose.
Thanks!

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post #4 of 20 (permalink) Old 01-31-2016, 11:34 AM
I run 205-55/15s with Rota wheel on both Spiders and GTVs with no rubbing.
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post #5 of 20 (permalink) Old 01-31-2016, 01:17 PM
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My Superleggeras, 15x7x29mm with 205/60/15, on my 1750 GTV don't rub. My car is lowered a bit as well. I would suggest 205/55 rather than the lower 50s or think about 195/60 or 205/60 to keep the diameter closer to OE as well as having a taller sidewall. This will have the benefit of looking more original with a sidewall height in proportion to rim diameter. I hope you have the 29mm offset instead of the 35mm.
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post #6 of 20 (permalink) Old 01-31-2016, 02:19 PM Thread Starter
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Brad-

Thank you so much for your kind reply.
I have yet to buy the wheels. The 15 X 7 look like my best bet. (yes the 29mm ones)

I am not that concerned about originality or speedo error. the speedo is way off already.
I am looking for a good balance of performance and comfort. The car is pretty stiff. The current set up in inadequate.

55 is as low as i'd want to go. 60 would be ok. Does the aspect ratio have an effect on the rubbing?
60's would be more comfortable driving, right?

Thanks again for all the help.

Current: 69 GTV, 2019 Stelvio, 95 Porsche 968 cab
Past 74 GTV, 69 GTV, 74 Spider
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post #7 of 20 (permalink) Old 01-31-2016, 02:29 PM
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Quote:
Originally Posted by Dave Garfinkel View Post
I am not that concerned about originality or speedo error. the speedo is way off already.
60 series = more OE looking = taller tire = less speedo error. US 1750s had 4.56 rear with 4.1 speedo drive, taller tire corrects for this, smaller tire makes it worse.

http://www.alfabb.com/bb/forums/alfa-romeo-club-canada-toronto-chapter/149533-alfa-parts-garage-sale.html

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post #8 of 20 (permalink) Old 01-31-2016, 02:40 PM
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Quote:
Originally Posted by Dave Garfinkel View Post
I am looking for a good balance of performance and comfort. The car is pretty stiff. The current set up in inadequate.
55 is as low as i'd want to go. 60 would be ok. Does the aspect ratio have an effect on the rubbing?
60's would be more comfortable driving, right?
60 series is a better compromise for performance/comfort.
Ratio effects rubbing, yes, no, maybe, depends. You would have no rubbing at all with 195/60/15s. 205/60/15 may require some subtle finessing. 60s would be more comfortable, all other variables being equal.

http://www.alfabb.com/bb/forums/alfa-romeo-club-canada-toronto-chapter/149533-alfa-parts-garage-sale.html

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post #9 of 20 (permalink) Old 02-01-2016, 02:03 PM
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I'd say that any 205 tyres on our 7x15s are going to rub so stick to 195s. You don't really want or need wider tyres than this on one of these cars.

195/60 gets you nearest to the rolling radius of the original 14" 165/80 tyres and the ride will be nicer. 195/55 sits the car a little lower and opens up a wider range of high performance tyres. 195/50 is a step too far and looks a little silly.

We put 195/65s on a roundtail Spider we restored and it looked great, the car had that big balloon "1960s race tyre" look that the owner wanted.


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post #10 of 20 (permalink) Old 02-01-2016, 02:57 PM
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I'd say that any 205 tyres on our 7x15s are going to rub so stick to 195s. You don't really want or need wider tyres than this on one of these cars.
I run 205/55-15, car is lowered and have had 0 rubbing.
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post #11 of 20 (permalink) Old 02-01-2016, 03:11 PM
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Any profile pictures of a GTV sporting 195/60?

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post #12 of 20 (permalink) Old 02-01-2016, 03:37 PM
All three wearing 205-55/R15 with lowered springs. No rubbing at all.

'69 GTV
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'69 Spider
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'76 Spider
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post #13 of 20 (permalink) Old 02-01-2016, 11:04 PM
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Quote:
Originally Posted by GPDenver View Post
I run 205/55-15, car is lowered and have had 0 rubbing.
Is that on Alfaholics GTA 15x7 wheels because that was the question in the original post and that was the question I answered.


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post #14 of 20 (permalink) Old 02-01-2016, 11:35 PM
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Is that on Alfaholics GTA 15x7 wheels because that was the question in the original post and that was the question I answered.
The wheels I posted are 15x7 et30, yours are 15x7 et29. Your saying the 1mm makes the difference between rubbing and not?

Also the yellow car above is pictured with the alfaholics wheels with 205/60r15 and no reported rubbing.
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post #15 of 20 (permalink) Old 02-02-2016, 03:50 AM
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Quote:
Originally Posted by Mound Dawg View Post
I'd say that any 205 tyres on our 7x15s are going to rub so stick to 195s. You don't really want or need wider tyres than this on one of these cars.
I have 205/60/15s on 15x7x29mm with no rubbing at all, I previously had 205/60/15s on 15x7x23mm with slight rubbing.

http://www.alfabb.com/bb/forums/alfa-romeo-club-canada-toronto-chapter/149533-alfa-parts-garage-sale.html
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