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Friday, June 15, 2018

18 x 10.5 +22 Wheels with Staggered Tires on a Nissan Skyline GT-R

18 x 10.5 +22 front and rear. 275/35/18 front and 295/30/18 rear tire

This would be a non standard setup for a Nissan Skyline GT-R. We generally don't like to see a staggered tire setup on an all wheel drive car.  This car is running a 18x 10.5 +22 wheel front and rear. The front and rear fenders are rolled. The car runs an adjustable upper control arm in the front and in the rear.  In the rear there is a lot of room, in the front not much room to the upright. Even some telltales of it making contact. 275/35/18 in the front, and a 295/30/18 in the back. The front tires/wheels already stick out further than we would like in the front, sorry we don't do the "poke." Terrible for aerodynamics, a look for kids and their Hondas. Adults try and keep the wheel and tire within the bodylines.

The smart thing for us to do on this car is to square it up with a 265/35 or a 275/35 tire. The 15 mm in diameter difference is more than we want to see with an all wheel drive car.


275/35-18295/30-18Difference
Diameter inches (mm)25.58 (649.7)24.97 (634.2)-0.61 (-15.5) -2.4%
Width inches (mm)10.83 (275)11.61 (295)0.79 (20) 7.3%
Circum. inches (mm)80.36 (2041.09)78.44 (1992.4)-1.92 (-48.69) -2.4%
Sidewall Height inches (mm)3.79 (96.25)3.48 (88.5)-0.31 (-7.75) -8.1%
Revolutions per mile (km)788.47 (489.93)807.74 (501.91)19.27 (11.97) 2.4%

What wheels fit on my R32 Skyline GT-R?

Can I run different sized tires on my Nissan Skyline GT-R? 

So, can you do it?  The answer I like to give people is - NO.  The reason is because I don't want them to do something wrong, and screw up their transfer case or ATTESA system, and blame it on me.

The real answer is, if the overall heights/diameters are similar enough, you can get away with different sized front and rear wheels, tires, etc.

There are no specs in the R32 Service manual, but the R35 service manual says

Diameter difference front/rear
0-4 mm STOCK
4-8 mm OK
8mm- and greater NO GOOD

I have seen worn tires throw an ATTESA code. You could get a code running tire pressures way wacky ie 40 psi in 3 tires, and 20 psi in one.

Most often people try and do some kind of staggered setup, don't do the calculations before they purchase tires, and now end up with a 2wd Nissan Skyline GT-R.  Which may sound like fun, until you want/need the all wheel drive.   So always check the diameters, make sure before you buy anything.  The safe way is stay square. Lets you rotate the wheels and tires around the car.
Front 25.58 inches (649.7 mm tall) 10.83 inches (275 mm) wide



Rear 24.97 inches (634.2 mm) tall. 11.61 inches (295mm) wide


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18 x 10.5+22




Tire clearance to front upright. This tire shows a lot of toe wear. 

Tire clearance to front upright. 275/35/18. This tire shows a lot of toe wear



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