Hey guys,

I have a 2004 f150 with 20x8.5 American Racing "Razor 6" wheels. I currently have 305/50r20 cooper zeon ltz tires on it but they're worn out and I want to get some BFG AT T/A KO tires now. I'm putting some bilstein 5100 shocks onto the truck with the 2" level option on the front.

My question is will 285/65r20 tires fit if the wheels have a 20mm offset with 6" backspacing? Or would I be better off getting 305/55r20 BFG's?

Thanks!

 

The 305/55-20's (33x12.50) will fit for sure. I'm pretty sure the 285/65-20's (35x11.50) will fit. This is asuming you have a 4x4.

 

Yep it's a 4x4. I've just heard that the backspacing could be an issue. I could be wrong though.

 

With 6" of BS you should be ok, it'll be close though.

- NCSU

 

The OEM 20's are 8.5 inches wide with 6.5 inches of BS. This causes some 305mm/12.50 inch wide tires to contact the upper balljoint/control arm. A 1/2 inch less BS will push the tire out enough so you should not have any issues with a wide (305mm) tire.