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Discussion summary
YOUR RESEARCHWinter tire sizing advice
Leading reported evidence
Use stock "turbo twist ii" wheels 11x18 and 8x18
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I'm using stock "Turbo Twist II" Wheels 11X18 and 8X18...
Leading evidence: 'Use stock "turbo twist ii" wheels 11x18 and 8x18' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Recommend 295/30/18 winter' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
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Suggestion
As for the Tire Size i just found out about the 235/40/18, i'm going to call them today and see if i can still change my order coz my tires are still on Order.
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Suggestion · Original poster
BTW: he said you can go either with 225/40R18 or 235/40/R18 on the fronts...he prefers sticking to the narrower ones so that you don't have to reset your front end alignment everytime you swap them.
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Suggestion · Original poster
One place said I MUST use 265R35/18 on the back but only on 18X10 wheels (and he's happy to sell me 2 TT replicas in that size for $350 a piece).
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Suggestion
As for the Tire Size i just found out about the 235/40/18, i'm going to call them today and see if i can still change my order coz my tires are still on Order.
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Suggestion · Original poster
BTW: he said you can go either with 225/40R18 or 235/40/R18 on the fronts...he prefers sticking to the narrower ones so that you don't have to reset your front end alignment everytime you swap them.
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I have a spare set of OEM turbo twist wheels sized: front 18x8 and rear 18x11. While shopping for winter tires, while all agree that the front should be identical to the OEM summer tire size (225/40R18) I've gotten mixed opinions on what size to go with on the back. One place said I MUST use 265R35/18 on the back but only on 18X10 wheels (and he's happy to sell me 2 TT replicas in that size for $350 a piece). Another said that I could go with the 265R35/18 on the the 18 x11 rims and although they were wider by .5" than the recomended; he's done it before.
I phoned the parts dept of the local Porsche dealer and he told me that Pirelli now makes an N rated Snowsport 240 in 295/35R18 which he recomends for my car. The OEM summer size is 295/30R18 so if I go with the last option, my rolling diameter increases by 4.45% to 26.12" (from 24.96") does that sound right? What should I do?
Hey Phil, the PCNA rec'd tires for your car are:
N-Rated Pirelli Winter 240 SnowSport
235/40 for the front
265/40 for the rear (10")
295/35 for the rear (11")
You can get it in 295 for the rear in a 30 series tire but that is for the 19" rim on the 997.
Hi Dell,
Just got off the phone with Damon @ tirerack and Pirelli did launch a new Porsche approved N-rated Snowsport 240 last year and it is available in 295/35R18 and because of the construction of the tire, the rolling diameter only increases by 2.8%. He said that a number of 996 turbo owners ordered them last year with no probs. If that works, it would certainly save me from ordering another set of rims.
Pongobaz:
I am from Toronto and dropped by Downtown Porsche yesterday to enquire about winter tires. Was told I should not put 265/35R18 on 10" wide rims (which I understand is the width of the C4S back wheels). They recommended 295/30/18 winter. First time I hear that. I personally find 295s too wide for the winter.
Are your 11" aftermarket?
I am expecting a call back today to settle the issue and will post reply.
Huh? 1999-2001 cars all came with 265s in back so I hardly see how that'd be a problem. Frankly, I think you meant to write 11" above and not the 10" that you listed.
Both sets of wheels are OEM. The ones that came with the car are 11" wide on the rear turbo twist
solid spoke
and those have 295/30R18 (summer tires currently) on them; I'll use those wheels as the winter ones.
I bought a set of original
hollow spoke
turbo twists from a PCA member this past summer and I'll use them for summer next year. Either way, the 265's are not recommended on anything wider than 10.5".
What up Phil?
This is what i did. I'm using stock "Turbo Twist II" Wheels 11X18 and 8X18... I ordered Pirelli Snowsport 240. Size 295/35/18 Rear and 225/40/18 Front. Now these are "Porsche Approved" Tires. I wanted 225/45/18 for the front to match the Rolling Diameter with the Rear, but 1010tires would not sell me "NON Porsche Approved" tires... Now the speed diffrence between the tires i ordered is 3.5%. 3 to 4% diffrence is okay anything more is not good. All four Tires costed me $1450 CND Shipped from 1010tires.com
1010tires refused to sell me Non Porsche Approvred tires, stating Porsche will Void my Warrenty and also explained how P Approved tires are built diffrently then non P Approvred tires. Also said the Tire size is slightly diffrent between Approved and Non Approved tires.
PS: The correct combo is 235/40/18N0 and 295/35/18N0...
Porsche CANNOT void your warranty by using non N-rated tires. However, then can deny a warranty claim if they can prove that the non N-rated tire(s) caused or contributed to the problem presented for repair.
With that said, I have never used anything but the N-rated tires. I trust that PAG/PCNA have developed (with the tire manufacturer) a tire that is best for the car. Besdies, I really like the n-rated tire selection. Some of the best out there!
Zookie:
Where do you get your tires mounted and "roadforce" balanced? At the dealer?
Also, did you compare 1010tires.com to tirerack for prices?
Thanks.
ML
EU Autowerks... is the shop for that kinda work or the Dealer lol
Yes i did although Tire Rack is way cheaper, i dint wanna pay $XXXX in Customs and Taxes when it crosses the Canadian Border. 1010tires ships from BC so only GTS, no PST or Customs
www.tiretrends.com
is the Canadian Tire Rack, and silimar prices to 1010tires...
Hi Zookie,
haven't seen you out at our GTG in awhile, what are you up to?
Yeah I'm about to order the snowsports 240 today...295/35R18 it is. Why didn't you go with the 235/40R18 for the fronts?
Also, who's doing your install in TO?
Sorry man 10am on a Satruday is too early for a young blood like me...
As for the Tire Size i just found out about the 235/40/18, i'm going to call them today and see if i can still change my order coz my tires are still on Order. They dont have that Size on their website...
EU Autowerks is going to do the Install...
Enjoy it while you can, 'cause pretty soon you'll be married with kids and getting out of the house on Sat mornings with your p-car early will be the quietest part of the day!
...just spoke to Dominic at EU Autowerks...those guys are great; only ones that could answer with complete confidence the rear tire question! I'll have my tires shipped straight to them for the install. BTW: he said you can go either with 225/40R18 or 235/40/R18 on the fronts...he prefers sticking to the narrower ones so that you don't have to reset your front end alignment everytime you swap them.
lol hahaha married... i'm 20 man i dont plan on getting married for another 10 years or so lol. Not that i'm planing but you never know.
Yea guys at Autowerks know their ish. Cool, i dint know that 225/40 is fine. So what i ordered is fine. Thanks. I actully went to Dominic first for the tires he found out he cant get em for another month or so. He quoted me $1600+Taxes installed. Which is not bad at all... So its up to you where you want to get your tires from Phil. Goodluck and Keep us updated.
Just ordered the Snowsport 240s from Tirerack to ship directly to EU Autowerks. I also ordered some new summer rears ( Potenzas R02 A) at the same time since mine are gone. All told its $1650 USD incl. shipping for 6 tires.
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