Truck rim fitting question. Need help for switching trucks!!?

Question

Hello everyone, i am having trouble with my old rims that i used to have on my blazer. They are size 255/55/r18. I recently bought a 2005 Mercury Mountaineer and the wheel dimensions are as follows : 245/65/R17. I recently took the wheels off and tried to put on the wheels i used to have on the blazer and they fit fine but the lugs werent fitting on the thread. Does anyone know if these wheels need the tuner lugs? Or just the lugs that will fit on the newer specifications? Or will these rims not even fit on the truck? I am relatively clueless when it comes to rims so please help me out here. Thanks in advance for your answers and i will award anyone who can help me out.

THANKS!

Answer 1

If I understand your question, they wont fit !!!!!!!!!!!!!!!

You had 255/55/R18 blazer and 245/65/R17 mountaineer...no way.....