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Hi All,
Forgive my ignorance. This is my first time ever using non stock rims. I recently bought a set of Porsche Champion RG5Bs. The tires on their right now are 285/35/22. I went to discount tires to buy some Kumho Crugen HP71s and they said the load rating is 106 and the Cayenne recommends 110. He said I should move up to 285/40/22. He can't guarantee (no rubbing) they would fit and I would need to do my research. So I've come to you all experts here for advice. They refused to put on the 285/35/22 tires and said the road hazard wouldn't cover it.

Now from other forums I've learned:
-285/40/22 is 8.7% larger and not recommended. Would throw off the speedo etc.?

I'm puzzled as to what I should do.. I need tires badly. Is it alright to run 106W tires?

I have 2015 Cayenne Diesel stock rims at the moment are 255/55/18 and very ugly lol.
 

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Hi All,
Forgive my ignorance. This is my first time ever using non stock rims. I recently bought a set of Porsche Champion RG5Bs. The tires on their right now are 285/35/22. I went to discount tires to buy some Kumho Crugen HP71s and they said the load rating is 106 and the Cayenne recommends 110. He said I should move up to 285/40/22. He can't guarantee (no rubbing) they would fit and I would need to do my research. So I've come to you all experts here for advice. They refused to put on the 285/35/22 tires and said the road hazard wouldn't cover it.

Now from other forums I've learned:
-285/40/22 is 8.7% larger and not recommended. Would throw off the speedo etc.?

I'm puzzled as to what I should do.. I need tires badly. Is it alright to run 106W tires?

I have 2015 Cayenne Diesel stock rims at the moment are 255/55/18 and very ugly lol.
Hi! I can only relate to the 18 inch size as both of our ’16 Cayenne’s use that size, but wanted to mention that per going back and forth from the Denver metro area to the mountains/over passes in all kinds of weather…we have been impressed w/ using the Michelin Cross Climate SUV all weather tire.
 

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Hi All,
Forgive my ignorance. This is my first time ever using non stock rims. I recently bought a set of Porsche Champion RG5Bs. The tires on their right now are 285/35/22. I went to discount tires to buy some Kumho Crugen HP71s and they said the load rating is 106 and the Cayenne recommends 110. He said I should move up to 285/40/22. He can't guarantee (no rubbing) they would fit and I would need to do my research. So I've come to you all experts here for advice. They refused to put on the 285/35/22 tires and said the road hazard wouldn't cover it.

Now from other forums I've learned:
-285/40/22 is 8.7% larger and not recommended. Would throw off the speedo etc.?

I'm puzzled as to what I should do.. I need tires badly. Is it alright to run 106W tires?

I have 2015 Cayenne Diesel stock rims at the moment are 255/55/18 and very ugly lol.
I can't comment regarding the size questions but the Kumho Crugen HP71"s are a good move. I changed over from my Badyear Eagle LS 2's and I love it.

No more woke tires on my car!
 

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Hi All,
Forgive my ignorance. This is my first time ever using non stock rims. I recently bought a set of Porsche Champion RG5Bs. The tires on their right now are 285/35/22. I went to discount tires to buy some Kumho Crugen HP71s and they said the load rating is 106 and the Cayenne recommends 110. He said I should move up to 285/40/22. He can't guarantee (no rubbing) they would fit and I would need to do my research. So I've come to you all experts here for advice. They refused to put on the 285/35/22 tires and said the road hazard wouldn't cover it.

Now from other forums I've learned:
-285/40/22 is 8.7% larger and not recommended. Would throw off the speedo etc.?

I'm puzzled as to what I should do.. I need tires badly. Is it alright to run 106W tires?

I have 2015 Cayenne Diesel stock rims at the moment are 255/55/18 and very ugly lol.
Hello,
Porsche only offers 22-in wheels on the Cayenne Coupe, and that model uses staggered wheel sizes (22 x 10 front, 22 x 11 rear). However, Porsche's specs on non-coupe Cayennes with 21-inch wheels (21 x 10) allow the use of 295/35-21, with a load rating of 107Y. See Porsche tyre approvals - Vehicle information - Porsche Service - Dr. Ing. h.c. F. Porsche AG to download their wheel/tire specs in PDF format.

So if they allow a load rating of 107 for 21-in tires, 107 should be appropriate for 22-in tires as well. I would point that out to your tire dealer.

As a baseline, the diameter of the Porsche-recommended 295/35-21 tires is 29.1 inches. The 285/35-22s on your wheels have a diameter of 29.9 inches, which is already 2.7% larger than stock. Alternatively, 295/35-22 tires have a diameter of 30.1 inches (1 inch taller than stock) and a load rating of 108Y. This size would make your speedo/odo read 3.4% low, but have a higher load rating.

If you want to go for the full 110Y load rating, you could use 305/30-22 tires, which have a diameter of 30.4 inches (4.5% lower speedo/odo reading). These are the largest width tires that will fit on 22 x 10-in rims, which I assume is the size you have.

By the way, 285/40-22 tires have a diameter of 31.0 inches, which is 6.5% taller, not 8.7% taller than the factory-recommended size. Still, it would throw off your speedo/odo more than any of these other sizes.

As I mention above, the Cayenne Coupe uses staggered sizes f/r: 285/35-22 front, 315/30-22 rear. Those tires have load ratings of 106 (f) and 107 (r), so again I would point this out to your tire dealer. See https://www.tirerack.com/tires/Tire...iameter=22&rearSortCode=61446&performance=ALL for details.

I hope this helps, and good luck with your tire search!
 
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