passnu2

iTrader: (33)

looking for 285/35-22 tires and I see there are few to choose from. I plan to run dedicated winter rims with snow/ice tires so looking for a summer or similar tire that will be used in Chicago for 7 months out of the year. Tires are for Audi Q7.

Anyone used any or our experts from TR can chime in. Looking to order in the next week here if possible.

Sltwtrking

All the tire models in the 285/35-22 size do not have the correct load carrying capacity for your Q7. Your vehicles calls for the load index 110 or higher. Most the models in this size are 106.

Although a little tall, I would look into the Nitto NT420S in the 285/40-22 size. This models carries the correct load index and has a nice aggresive street tread pattern.

passnu2

iTrader: (33)

when I pull up the OE tire its 109 on the index....I cant imagine I need this on my suv? at 106 tire load is 2094 lbs per tire. I guess I have to see what the actuall weight of the SUV is to see if I need more. Thanks for pointing this out

I was thinking of the Pirelli and it has a 106 load index and the XL. I read reviews that this is on the X5 and Porsche SUV also. Seems to be a all around good tire.

Sltwtrking

^
The load index also reflects the strength of the carcass which has a direct affect on the handling of the vehicle. Going with a lower load index can cause sloppy handling and even reduced braking.

Brandon@TR

Exactly which model year and version Q7 are we talking about please?

Sltwtrking

With a 109 load index stock, it's most likely a 3.6 base model.

passnu2

iTrader: (33)

sorry for late reply...its a 2008 3.6 premium pkg. I read conflicting info on the curb weight. The car has the upgraded 19" rims currently. I will be replacing with the new 22 x 10 OEM rims.

Thanks

Brandon@TR

Here is the information required to make this decision...

GAWR Front 3241 lbs Rear 3902 lbs
Rec Min Speed Rating.. H Min Load Capacity.. X

Your tire must carry half of the GAWR of the heaviest axel.

In this case that is the rear axel so it must be .5 * 3902 or 1951.

So the tire must carry at least 1951 lbs.

Anything 104 (1984lbs) or greater would carry enough weight.

I don't see any problem technically with using the 106 Pirelli.

As far as OE tires go, there was actually a 21 inch optional Dunlop from the factory that had a 107.

Sltwtrking

The OEM tire pressures on this application set by AUDI with the 109 (XL) load index are 44PSI front and 49 PSI rear. This puts the load carrying capacity front and rear at 2271lbs. Running the 106 load index @ maximum pressure puts the tire at 2094lbs which is a 700lb difference from stock which does not count for the vehicle loaded or under load. In-order for the 106 load index to be run, both the front and rear would have to be run at maximum pressure which will affect handling and braking. Not to mention from AUDI, the vehicle was set-up to perform with the front tires not being set at maximum pressure.

Brandon@TR

Certainly there may be ramifications to the handling and ride of the Audi, just by moving to a 22 inch wheel. Most people who want to get 22's aren't looking for performance but looking to improve the appearance of their CUV/SUV. But if we are asking strictly if a 106 carries enough weight to be used safely on the vehicle then the answer is, yes it does.

Sltwtrking

A 22 tire @ maximum pressure F and R on this vehicle will make a 22" set-up handle even rougher and sloppier. I wouldn't do it personally but that's just my $.02.

Brandon@TR

I would expect the ride to be stiffer, and for him to feel more of the road transmitted through the seat and steering wheel. But the sidewall is much lower profile so I doubt it would feel sloppy or floaty. It would probably be pretty responsive actually, maybe overly so.

Sltwtrking

Overly responsive is a good way to put it.

passnu2

iTrader: (33)

Thanks Brandon that is all I was looking for. I know how the car will ride and handle but thanks for your $.02 lol...

Brandon can you PM me a quote shipped to my door please. Thank you

Mike

Brandon@TR

I would say the best bet is the Yoko Parada Spec X in that size. The delivered total to Chicago area would be like $945. Let me know, my contact info is below.