CPO & Tires
07-24-2011, 09:58 AM
#1
Track Day
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CPO & Tires
Took the 07S in for an independent inspection due to a wobble at 70 mph. The wobble is coming from the tires and the rear is down to 4/32. Question for the forum, since the Michelin SS are not N rated and may not come out in the 295 series anyway, which of the N rated tires do you recommend? Am thinking either the ps2 or the p zero.
Online the prirelli rosso have two N rated tires out there, N1 and N2. What I read on tire track says the number denotes the series, meaning the N2 is the third update after the n0, n1. Both n1 and n2 are available at the same price so N2 sounds like the way to go.
Also, called the dealership as i thought one of the guarantees of a CPO car is that it would have minimum tread depth at purchase? After a week still no reply. I realize tires aren't covered under CPO but not sure that should have passed inspection.
Would like your input on that as well.
Thanks!
Online the prirelli rosso have two N rated tires out there, N1 and N2. What I read on tire track says the number denotes the series, meaning the N2 is the third update after the n0, n1. Both n1 and n2 are available at the same price so N2 sounds like the way to go.
Also, called the dealership as i thought one of the guarantees of a CPO car is that it would have minimum tread depth at purchase? After a week still no reply. I realize tires aren't covered under CPO but not sure that should have passed inspection.
Would like your input on that as well.
Thanks!
07-24-2011, 10:01 AM
#2
Burning Brakes
Took the 07S in for an independent inspection due to a wobble at 70 mph. The wobble is coming from the tires and the rear is down to 4/32. Question for the forum, since the Michelin SS are not N rated and may not come out in the 295 series anyway, which of the N rated tires do you recommend? Am thinking either the ps2 or the p zero.
Online the prirelli rosso have two N rated tires out there, N1 and N2. What I read on tire track says the number denotes the series, meaning the N2 is the third update after the n0, n1. Both n1 and n2 are available at the same price so N2 sounds like the way to go.
Also, called the dealership as i thought one of the guarantees of a CPO car is that it would have minimum tread depth at purchase? After a week still no reply. I realize tires aren't covered under CPO but not sure that should have passed inspection.
Would like your input on that as well.
Thanks!
Online the prirelli rosso have two N rated tires out there, N1 and N2. What I read on tire track says the number denotes the series, meaning the N2 is the third update after the n0, n1. Both n1 and n2 are available at the same price so N2 sounds like the way to go.
Also, called the dealership as i thought one of the guarantees of a CPO car is that it would have minimum tread depth at purchase? After a week still no reply. I realize tires aren't covered under CPO but not sure that should have passed inspection.
Would like your input on that as well.
Thanks!
07-24-2011, 10:17 AM
#6
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^That's what I'd do if the fronts are in good shape. Fronts can last about 2X the rears. Check the front code dates. They are probably about 4 years old. Replace if over 5 years old. Maybe dismount, flip sides, and rebalance when doing the rears. Alignment may be a good step too.
If the Super Sports turn out to be a high qaulity tire, the "N" rating is not critical. There are many great un-N rated tires out there.
If the Super Sports turn out to be a high qaulity tire, the "N" rating is not critical. There are many great un-N rated tires out there.
07-24-2011, 10:19 AM
#7
Three Wheelin'
From the Porsche website
What Checks has an Approved Porsche Passed?
Fitting of Genuine Porsche Parts, replacing all non-Porsche parts and accessories
A comprehensive 111 point mechanical inspection to ensure every component is fully functional
Electrical functionality and battery condition check
The fitment of ‘N’ rated tyres which are approved by Porsche.
Tyres must have a minimum remaining tread depth of 3mm
A full service will be carried out along with all routine maintenance due within the next 3,000 miles or three months
Complete valet and final inspection
12 months MOT (where required)
These are the minimum standards for a Porsche to become Porsche Approved but every car is treated individually when it is being restored to its original condition.
Fitting of Genuine Porsche Parts, replacing all non-Porsche parts and accessories
A comprehensive 111 point mechanical inspection to ensure every component is fully functional
Electrical functionality and battery condition check
The fitment of ‘N’ rated tyres which are approved by Porsche.
Tyres must have a minimum remaining tread depth of 3mm
A full service will be carried out along with all routine maintenance due within the next 3,000 miles or three months
Complete valet and final inspection
12 months MOT (where required)
These are the minimum standards for a Porsche to become Porsche Approved but every car is treated individually when it is being restored to its original condition.
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07-24-2011, 10:22 AM
#8
Race Director
^That's what I'd do if the fronts are in good shape. Fronts can last about 2X the rears. Check the front code dates. They are probably about 4 years old. Replace if over 5 years old. Maybe dismount, flip sides, and rebalance when doing the rears. Alignment may be a good step too.
If the Super Sports turn out to be a high qaulity tire, the "N" rating is not critical. There are many great un-N rated tires out there.
If the Super Sports turn out to be a high qaulity tire, the "N" rating is not critical. There are many great un-N rated tires out there.
07-24-2011, 10:30 AM
#9
Three Wheelin'
Since the rears last only half as long as the fronts, you probably need two rears that match the existing fronts(same type of tire). Have a good shop mount,balance and see if you need 4 wheel alignment to preserve your investment in your tires. Next time you can get all 4 new in whatever brand you want. I got 4 mich PSS to replace PS2. Does this make sense to most other Rennlisters? Of course you can accelerate the process as I did by doing some DE events and now the new tires will be back out one more time this summer early Sept in the NW.
07-25-2011, 10:51 AM
#11
Three Wheelin'
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According to my CPO checklist (could be out of date as it is from 2007) the minimum tread depth allowed is 4mm. Convert that to inches and it is 5/32.
I would be all over that dealer if I were you. No way you should be forced to shell out for new tires on a newly purchased car from a dealer. Even without the CPO, you should have no wobble and some reasonable service life. With the CPO, you should be guaranteed 5/32 tread depth. They should have replaced those tires. From my CPO checklist: "All four tires must be of the same brand, model, speed rating, specification code, and age. If the tread depth is less than four (4mm) the tire(s) must be replaced with OEM tires as outlined in the current Porsche Tire Bulletin."
I would be all over that dealer if I were you. No way you should be forced to shell out for new tires on a newly purchased car from a dealer. Even without the CPO, you should have no wobble and some reasonable service life. With the CPO, you should be guaranteed 5/32 tread depth. They should have replaced those tires. From my CPO checklist: "All four tires must be of the same brand, model, speed rating, specification code, and age. If the tread depth is less than four (4mm) the tire(s) must be replaced with OEM tires as outlined in the current Porsche Tire Bulletin."
07-25-2011, 12:51 PM
#12
Race Director
Separately each state has minimum thread requirements on used cars.
07-26-2011, 12:44 AM
#13
Three Wheelin'
On the CPO checklist the c4s I bought had 2 mm tread at 16k miles on the rears and so were replaced by new PS2s. 305/30/19. The fronts still had enough tread life and so were not changed. Just got new Mich PSS all around . 5 DE events and some Porsche club trips accelerated the process.
07-26-2011, 01:15 AM
#14
Rennlist Member
07-26-2011, 11:24 AM
#15
Burning Brakes
According to my CPO checklist (could be out of date as it is from 2007) the minimum tread depth allowed is 4mm. Convert that to inches and it is 5/32.
I would be all over that dealer if I were you. No way you should be forced to shell out for new tires on a newly purchased car from a dealer. Even without the CPO, you should have no wobble and some reasonable service life. With the CPO, you should be guaranteed 5/32 tread depth. They should have replaced those tires. From my CPO checklist: "All four tires must be of the same brand, model, speed rating, specification code, and age. If the tread depth is less than four (4mm) the tire(s) must be replaced with OEM tires as outlined in the current Porsche Tire Bulletin."
I would be all over that dealer if I were you. No way you should be forced to shell out for new tires on a newly purchased car from a dealer. Even without the CPO, you should have no wobble and some reasonable service life. With the CPO, you should be guaranteed 5/32 tread depth. They should have replaced those tires. From my CPO checklist: "All four tires must be of the same brand, model, speed rating, specification code, and age. If the tread depth is less than four (4mm) the tire(s) must be replaced with OEM tires as outlined in the current Porsche Tire Bulletin."