All Season or Winter Tires for 996TT

theprf
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Re: All Season or Winter Tires for 996TT

Post by theprf » Wed Oct 14, 2020 9:33 am

FRUNKenstein wrote: Tue Oct 13, 2020 4:48 pm Professor -
I didn't check the actual dimensions, but Porsche recommends either 265/35 or 275/35 for the rears to go along with 225/40, so I figured they will be fine. The 275 should be closer to the OE circumference (295) than the 265. But, I will double check anyway as I don't want to thrash the viscous coupling.
Hehe, I got that name from back when arcade video games only gave you 3 letters for high score. I used PRF.

My owner's guide (I have a 2003 TT) shows 225/40-18 fronts and 265/35-18 rears for winter tires, 225/40-18 and 295/30-18 for summer tires, and I have used 245/40-18 fronts and 315/30-18 rears (GT2 sizes) for track tires.
Track tires are Nitto NT01's:
245/40-18 is 789 revs/mile
315/30-18 is 796 revs/mile
so the fronts are turning slower. Incidentally the digital speedo is exactly correct with these tires!

Summer tires are Sumi HTR3's:
225/40-18 is 823 revs/mile
295/30-18 is 837 revs/mile
so the fronts are turning slower here, too. Incidentally the speedo reads 4 mph slow at highway speeds. Indicated = 75, actual = 71.

Suggested winters, I looked up the Michelin Pilot Sport A/S on tire rack:
225/40-18 is 825 revs/mile
265/35-18 is 816 revs/mile
So now the fronts are turning faster. What's up with this, Porsche? I guess it's OK, as they recommend it. I've read many times of odd handling and performance issues with fronts turning faster though.
Incidentally these are in stock at Tire Rack for $679 with the "instant rebate".

Incidentally the 275/35-18 Michelin Pilot Sport A/S is also listed as 816 rev/mile, which can't be correct.

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FRUNKenstein
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Re: All Season or Winter Tires for 996TT

Post by FRUNKenstein » Wed Oct 14, 2020 9:47 am

theprf wrote: Wed Oct 14, 2020 9:33 am
FRUNKenstein wrote: Tue Oct 13, 2020 4:48 pm Professor -
I didn't check the actual dimensions, but Porsche recommends either 265/35 or 275/35 for the rears to go along with 225/40, so I figured they will be fine. The 275 should be closer to the OE circumference (295) than the 265. But, I will double check anyway as I don't want to thrash the viscous coupling.
Hehe, I got that name from back when arcade video games only gave you 3 letters for high score. I used PRF.

My owner's guide (I have a 2003 TT) shows 225/40-18 fronts and 265/35-18 rears for winter tires, 225/40-18 and 295/30-18 for summer tires, and I have used 245/40-18 fronts and 315/30-18 rears (GT2 sizes) for track tires.
Track tires are Nitto NT01's:
245/40-18 is 789 revs/mile
315/30-18 is 796 revs/mile
so the fronts are turning slower. Incidentally the digital speedo is exactly correct with these tires!

Summer tires are Sumi HTR3's:
225/40-18 is 823 revs/mile
295/30-18 is 837 revs/mile
so the fronts are turning slower here, too. Incidentally the speedo reads 4 mph slow at highway speeds. Indicated = 75, actual = 71.

Suggested winters, I looked up the Michelin Pilot Sport A/S on tire rack:
225/40-18 is 825 revs/mile
265/35-18 is 816 revs/mile
So now the fronts are turning faster. What's up with this, Porsche? I guess it's OK, as they recommend it. I've read many times of odd handling and performance issues with fronts turning faster though.
Incidentally these are in stock at Tire Rack for $679 with the "instant rebate".

Incidentally the 275/35-18 Michelin Pilot Sport A/S is also listed as 816 rev/mile, which can't be correct.
Got it. So, I'm assuming "prf" is probably short for "professional" as opposed to "professor"?

Thanks for doing the legwork for me on the revs/mile.

For the 265/35-18, the problem is that the load rating is only 97, but the car calls for 98. It is a minor difference, but Discount Tire said they can't mount a tire on a car that doesn't meet the load rating specs. The 275/35-18 has a 99 load rating. The 265s are about $20 per tire cheaper, though.
www.kansascityautomuseum.com
Current:
2002 996TT X50, Guards Red
1987 928S4, Guards Red
1987 951, Guards Red
1973 914 2.0 Bahia Red

2006 955S, Lapis Blue
Other toys:
1988 BMW 325i Cabriolet, Alpin Weiss
1987 Bertone X1/9, Verde Chiaro
Gone but not forgotten: 1975 914 2.0, Laguna Blue; 1999 996 C4 Aerokit Black; 1990 964 C2 Guards Red; 2006 955S Arctic Silver

theprf
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Re: All Season or Winter Tires for 996TT

Post by theprf » Thu Oct 15, 2020 7:59 am

Well, actually my high school buddies did call me the prof because I was really good at math. I have kept the legacy alive by continuing to use that moniker.

Perhaps it's worth a post on that other forum to see if anyone has additional info regarding tire sizes, before committing dollars to the cause.

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gnat
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Re: All Season or Winter Tires for 996TT

Post by gnat » Thu Oct 15, 2020 8:42 am

theprf wrote: Thu Oct 15, 2020 7:59 am Perhaps it's worth a post on that other forum to see if anyone has additional info regarding tire sizes, before committing dollars to the cause.
Post there about driving the almighty Turbo in non perfectly sunny and warm weather?

Please post a link so I can break out the popcorn and enjoy the show :lol:

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32wildbilly
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Re: All Season or Winter Tires for 996TT

Post by 32wildbilly » Thu Oct 15, 2020 8:55 am

gnat wrote: Thu Oct 15, 2020 8:42 am
theprf wrote: Thu Oct 15, 2020 7:59 am Perhaps it's worth a post on that other forum to see if anyone has additional info regarding tire sizes, before committing dollars to the cause.
Post there about driving the almighty Turbo in non perfectly sunny and warm weather?

Please post a link so I can break out the popcorn and enjoy the show :lol:
I was going to say something about a crapped out track rat but this is even better. Doc will have great ideas on snow tires for a turbro. :roll:
Never gonna make you cry...

theprf
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Re: All Season or Winter Tires for 996TT

Post by theprf » Thu Oct 15, 2020 10:27 am

gnat wrote: Thu Oct 15, 2020 8:42 am Post there about driving the almighty Turbo in non perfectly sunny and warm weather?

Please post a link so I can break out the popcorn and enjoy the show :lol:
I drove mine last night in the dark. So far, so good. :D

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gnat
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Re: All Season or Winter Tires for 996TT

Post by gnat » Thu Oct 15, 2020 11:47 am

theprf wrote: Thu Oct 15, 2020 10:27 am
gnat wrote: Thu Oct 15, 2020 8:42 am Post there about driving the almighty Turbo in non perfectly sunny and warm weather?

Please post a link so I can break out the popcorn and enjoy the show :lol:
I drove mine last night in the dark. So far, so good. :D
Well you'll never be able to sell it for better than scrap value now!

theprf
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Re: All Season or Winter Tires for 996TT

Post by theprf » Thu Oct 15, 2020 1:29 pm

gnat wrote: Thu Oct 15, 2020 8:42 am Post there about driving the almighty Turbo in non perfectly sunny and warm weather?

Please post a link so I can break out the popcorn and enjoy the show :lol:
Someone unknown to me started a thread there, so I tagged a post onto it.
https://rennlist.com/forums/996-turbo-f ... tires.html

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gnat
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Re: All Season or Winter Tires for 996TT

Post by gnat » Fri Oct 16, 2020 8:32 am

theprf wrote: Thu Oct 15, 2020 1:29 pm
gnat wrote: Thu Oct 15, 2020 8:42 am Post there about driving the almighty Turbo in non perfectly sunny and warm weather?

Please post a link so I can break out the popcorn and enjoy the show :lol:
Someone unknown to me started a thread there, so I tagged a post onto it.
https://rennlist.com/forums/996-turbo-f ... tires.html
That thread is seriously under performing :?

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FRUNKenstein
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Re: All Season or Winter Tires for 996TT

Post by FRUNKenstein » Sat Nov 21, 2020 8:30 pm

Put the winter rims & all season tires on this afternoon. Did not go for a drive as I had a bunch of other stuff to do.
www.kansascityautomuseum.com
Current:
2002 996TT X50, Guards Red
1987 928S4, Guards Red
1987 951, Guards Red
1973 914 2.0 Bahia Red

2006 955S, Lapis Blue
Other toys:
1988 BMW 325i Cabriolet, Alpin Weiss
1987 Bertone X1/9, Verde Chiaro
Gone but not forgotten: 1975 914 2.0, Laguna Blue; 1999 996 C4 Aerokit Black; 1990 964 C2 Guards Red; 2006 955S Arctic Silver

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