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718 GTS 4.0/GT4/GT4RS/Spyder/25th Anniversary Discussions about the 718 version of the GT4RS, GTS 4.0, GT4, Spyder and 25th Anniversary Boxster
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Old 11-03-2021, 10:26 AM
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ExMB
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Originally Posted by jmartpr
The 245s will be no problem....not sure about the 305s as manufacturers sometimes stamp a tire with a size but when you measure they are all over the place.....if these are new who knows.
The 'Ring time was classified as official (production car) that means they will need to make a Cup 2R tire to fit.
One simple upgrade for Porsche is to give the 4RS that extra 0.5" of front wheel width that's standard on the GT3...then you can more easily fit a 255 and improve handling.
Agreed. Especially on the 305 which was mounted on a 12" wide wheel on the GT3. Lots of comments on that fitment in the GT3 forum. Some say it was a specialty tire, that is was mismarked, etc.
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Old 11-03-2021, 10:38 AM
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Originally Posted by ExMB
Agreed. Especially on the 305 which was mounted on a 12" wide wheel on the GT3. Lots of comments on that fitment in the GT3 forum. Some say it was a specialty tire, that is was mismarked, etc.
Yeah, the 305 on the GT3 was an unusual size. It was considerably wider than a typical 305 (somewhere between 310 and 320) and the 30-series profile was closer to 25. Porsche does weird things with their OEM tires to make the cars largely incompatible with non-N rated tires.
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Old 11-03-2021, 11:27 AM
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Originally Posted by jmartpr
OEM rear tire diameter on the GT4 is 27".....I have been able to use Pirelli DHs in 305/690-19 for a total of 27.2" but it's very, very tight
Where are you getting the Pirelli DH's?
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Old 11-03-2021, 12:14 PM
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Originally Posted by porscheflat6
Where are you getting the Pirelli DH's?

Used to buy them from Frisby Tire in NV but I'm sourcing them now from SASCO on the East coast.........they were able to get me the rears in 295 which Frisby told me would not be available.
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Old 11-03-2021, 10:16 PM
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Originally Posted by jmartpr
Used to buy them from Frisby Tire in NV but I'm sourcing them now from SASCO on the East coast.........they were able to get me the rears in 295 which Frisby told me would not be available.
Do they have a website? So what is your tire combo?
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Old 11-03-2021, 10:27 PM
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Originally Posted by porscheflat6
Do they have a website? So what is your tire combo?
https://sascosports.com/

275 and 295 in 19" rims
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Old 11-03-2021, 10:28 PM
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Originally Posted by jmartpr
https://sascosports.com/

275 and 295 in 19" rims
Thank you!!
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Old 11-03-2021, 10:30 PM
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Originally Posted by porscheflat6
Thank you!!


Warning...if you use them you will not go back to any tire.....worst than crack!
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Old 11-03-2021, 10:34 PM
  #3009  
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Originally Posted by jmartpr


Warning...if you use them you will not go back to any tire.....worst than crack!
I have been using take-off from usedracingtires.com on my GT3 and 3RS and it is quite a step up from Hoosier R7. Buying them new though is brutal. Lol I like the take-off prices
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Old 11-03-2021, 11:36 PM
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Originally Posted by porscheflat6
I have been using take-off from usedracingtires.com on my GT3 and 3RS and it is quite a step up from Hoosier R7. Buying them new though is brutal. Lol I like the take-off prices

That's how it started for me...first scrubs and then new. But agree hard to beat scrub prices......
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Old 11-04-2021, 01:21 PM
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Looks like more evidence for a Weissach option.

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Old 11-04-2021, 01:29 PM
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Originally Posted by ExMB
Looks like more evidence for a Weissach option.

Or they reused some GT3RS WP seats they had around for the pre-production cars they are still using....that's why the WP on the head rest is cover
But that face is not helping a lot either.......
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Old 11-04-2021, 01:29 PM
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Originally Posted by ExMB
Looks like more evidence for a Weissach option.

Weissach option=PAM! (Porsche Additional Markup)

Almost like they try 'not' to hide the clues sometimes!
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Old 11-04-2021, 01:30 PM
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Originally Posted by ExMB
Looks like more evidence for a Weissach option.

Strategic head forward pose.....just dropping clues.
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Old 11-04-2021, 01:38 PM
  #3015  
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Weissach option = waste of money for little weight savings gain. I didn't order it on my 3RS. I used the money for brake upgrade, light track wheels, cage, harness, Lithium battery, JCR exhaust and still had $10K left and dropped 60 more lbs than what the weissach offered in weight savings. If I get an allocation, I will not check the box just like my last order.
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