I just found your channel. I might be wrong, but the second number on the tire size is not millimeters, but a percentage based on the wheel width (the first number). So in the case your present here, 245/35/ZR20, the wall side is 35% or the 245mm on the wheel width. The ZR20, while you are correct about the Z rating, you forgot to mention that the 20 means inches for the rim. No hate, I think this is a really great video and very informative. I just wanted to bring these two points to your attention
Wow that’s good info so many people worry that shops lie about when they need new tires. You’re giving us power to know for ourselves if we do need them. Thanks!
another great video and very informative. I always wondered about all those things. I love that red GT4. If it didn't have a roof, I would be over to your desk in about 10 minutes
If you wanted performance you should go for 18” wheels. All racing Caymans run on 18” wheels for a reason. 19” 20” are just for posing, in fact I’d go further than that and say that in my experience they’re dangerous in the wet as they have more surface area to clear.
I came here to correct you on the meaning of the aspect ratio. But, I see lots have already pointed out that’s is not a measurement in millimeters like you suggested. But really, a quick measurement would have let you know that.
Thank you for the info it was very easy to follow. I have a question. Just checking to see if you have a solution. All 4 tpms were changed out, Panamera 4s 2011.The one on the passenger rear indicator came on again. Took it to Euro car dealer, he hooked up to the pc and programmed in so he says, yesterday, I drove and now today same tire sensor came on. Do you have any suggestions? I used the new one that was sent in the rear passenger. All 4 sensors are brand new and the 5th spare sensor was used just in case the one was defective.
Hmmm. The aspect ratio is a RATIO of the sidewall height to the tread width, not a mm measurement. Strangely enough the wheel diameter is in inches but other measures are metric. Acquiring an 'N' rating is an iterative process and is a long-term (years!) joint development process. Both Porsche and the tire company will test more than once to find out what works best for the particular car. The tires are often significantly different from the tires on general sale although the N rating may be the only difference in model numbers. Porsche also says that the TPMS is for notifying you of problems and should not be used for pressure measurements when checking and inflating tires-use a proper gauge so each tire is measured with one gauge, not 4 separate gauges. Let's see this video updated so people are getting accurate information.
Can I have different brand of tyre front and back? My pzero front are new. But the rear don’t have long left and I want to put pilot sport 4S on the rear. Thanks. Great video.
Very informative and timely video. I am 3 weeks away from from receiving my 2021 Cayman GTS here in New Jersey- its getting cold. I have a question regarding winter tires. It appears that the only winter tires that have the "N" rating for my model year car are the 19 inch Michellin Alpines- OE wheels are 20 inch and thus I would need to purchase a tire/wheel set. Although the Pirelli Sottozero 20 inch will fit my OE wheels, the tires are not approved for Porsche. Your advice would be highly appreciated!
Great glad it was helpful, thank you for your question and congratulations on the new 2021 Cayman GTS that car is going to be a monster especially bringing back the 4.0 liter flat six, excited for you! I am a big proponent of factory equipment however in this circumstance I would say go with the Pirelli Sottozero Tires that will fit your factory 20" inch wheels! The Sottozero tires are a great tire with ample performance for winter driving! In my opinion the "N" rating is more important in the standard summer tires and all season tires as typically in dryer conditions you will be pushing the limits of the car more than you would in wintery conditions on winter tires! Hope this helps! Would love to see the new ride.. if you get a chance please send over some pics to pcarwhisperer@gmail.com Have a great weekend! Enjoy the new ride😎👍
@@Pcarwhisperer I appreciate your response and advice with respect to OE and concerns about the N rating being more applicable to summer tires. I feel more confident now with the 20” Pirellis and will post pics as soon as I have possession. Cheers
Porsche Toronto says the only N rated tires in their system are the P-Zeros and the Goodyear Eagle F-1. What is your opinion of the Goodyear Eagle F-1 for a 718 with the 4 cyl turbo?
Hey Richard! I do like the Goodyear Eagle F-1's over the P-Zero's! Never been a huge Pirelli fan I personally like a little bit of a softer tire to help with road noise... may not last quite as long but like the overall performance! What size are your rims? There is a N-Spec Michelin Pilot Sport 4S for 20inch wheels.
@@Pcarwhisperer I am told I have 18 inch wheels on the 718 Cayman. It's in Winter storage right now so I can 100% confirm, this is what the dealer has on record. I ran on the P-Zeros for a season. I am concerned the lack of tread makes them not so useful on wet roads.
Ahh gotcha! The Goodyear's according the the tread wear rating will last a bit longer as they are a 240 wear rating and the Pirelli's are a 220 rating so slightly longer for Goodyear! Worst case scenario to get significantly longer tread wear there is a Michelin all season tire with a 540 tread wear rating. It is not a N-Rated but will last longer almost twice as long!
What if they make the same model tire with and without the N-rating, any concern? With the PS4, they make an N-rated and a non N-rated. What's the difference when they look identical and have the same specs? Thanks!
@@jusssy5078 I have non N-rated PS4s on my 987.1 and I've never noticed anything about them. I've never driven with N-rated, so I don't know what I don't know. When it comes time to replace, I'm going to try and get N-rated, but if they are too hard to get it too $$, then the regular version is going to be fine with me. I'm satisfied with mine and have used them in all kinds of weather except snow. If it's colder or wet, I usually drop 1-2 lbs of air and the car goes right back to normal.
@@milogger7556 Hi, just had an email from my Porsche Centre about my non N rated Michelin 4S, they say "in a nutshell, yes they are safe to drive but with the sidenote that the behaviour might be different from what you might have gotten used to". Suits me, though I'll surely get rated tyres next time round. Cheers
