All the info is here  
  
These wheels were introduced on the 2005 35th Anniversary 350Z. However, Anniversary owners were in for a shock when these came standard on the 2006 and 2007 models on the Base, Enthusiast, and Touring trim levels.  
  
Cost 
Expect to pay around $900 or more for a used set in good condition.  
2005-2007  
Aluminum Alloy  
Front  
Size: 18x8.0  
Offset: +30mm  
Weight: 24.4  
Tire: 225/45/18  
Rear  
Size: 18x8.5  
Offset: +33mm  
Weight: 25.8  
Tire: 245/45/18