Wheels and Tires

They are 16x7" with a 30mm offset. 6 x 5.5" with a thread of 12mm x 1.25.

They will work on older model Xterras just fine.

Yes, they will. SE models featured 16" wheels on these earlier model years. 17" wheels and tires will not fit without modifying the mud flaps, however.

Take a peek at "Xterra Tire Size Fitment Chart."

The Xterra over the years has been available with 15", 16" and 17" wheels. All are 7" wide (except for the 17" size, which is 8" wide). The bolt pattern is 6 x 5.5" with a thread of 12mm x 1.25.

To accommodate larger wheels and tires on the 2002 and up model years, Nissan has switched mudflap design.

Nissan 15x7" and 16x7" wheels have a +40mm offset (5.50" backspacing, some say 5.25"). No data on the 17" wheels.

Frontier rims also have this convention, including the "Desert Runner" rims.

There is quite a complete reference on wheels available.