Hi I own a 2000 blazer ls with the zr2 suspension option I m wanting to go with a aftermarket wheel right now I am running 31x10.50x15 tires on the factory 15 inch wheels anyway I just bought new tires so I need to stay with the 15 inch wheel I guess. I did find some wheels in austaila they are called allied wasp, problem is I gave them all the info I though they would need but they want to know the fitment. I mean wow why do they have to make things more complicated what happened to the days of muscle cars you go in a say I nedd a 15 inch rim for my 1967 chevell. never heard of backspacing fitment ect until now. anyway LIKE I said they are the factory wheels they asked me if the fitment was 5/114.3 or 5/139.7 because they don' have blazers in austraila. that's funny. thank for helping someone who just is not up to the times.

 

Take a look at this thread, among many others.