Does anyone know if on each alloy wheel, there is any marking identifying the size of the wheel? Dealer I bought car from (not a Nissan dealer) put new tires on all 4, the idiots put P225/50 R17's all around and I think mixed the rims from front to back. I would like to identify myself front vs. back and make sure they use the right rims when they swap out two tires with P235/50 R17’s.

 

Pics of your wheels? We don't know which ones you have, the year of your car . . .

 

There should be markings near the barrel indicating,7.5 front,8.0 rear.
In addition there is a bolt on the rear hub that acts as a guide not to switch wheels.
It may have been removed.If it has stock WHEELS,and the bolt was left on,the wheels
are prolly correct.

 

Welcome to the forum and congratulations on your purchase. As dcains mentions, it would be worthwhile uploading a photo of your wheels as the 18" wheels are of a different width from front to back, not sure about the 17" wheels though.

 

Pretty sure he's talking about 17s since he mentioned 17" tires

 

Pic of wheel they are 17's.

 

Thread moved...

 

The wheels in the pic are stock so the bolt on the axle’s hub prevents mixing up the front and rear wheels.

--Spike

 

The bolt on the rears must have been removed, simply used a tape measure to measure the widths rears are both narrower than fronts, so they have them backwards, so I will have the dealer switch them around and put the P235's in the rears. Amazed by the lack of knowledge by mechanics.

 

There is no bolt on the rear. However, there is a bolt on the front disc to prevent the rear wheel from being bolted on the front. Thos 17" wheels are 7" wide on front and 7.5" in back.

 

^ This.

 

Somoene mentioned that the bolt can be removed, is that true. The rear wheels are smaller than the fronts for sure.

 

Yes, the bolt is on the front hub and it can be removed. I had the 17" wheels also and I removed the bolt when I switched to 18 inch aftermarket wheels.

 

When I got my Z, there was a sticker on the center console where the removable cup holders are that gave stock tire specs.