I need to replace the rear rotors. Same story. 60k, warped. Anyway, I called Kreagan and the clerk asked if I had 12 or 14 mm studs. How do I find out? My truck is an 03 Screw FX4. No other mods. Also, I read alot about Brembo. But I have used raybestos forever. Has anyone used the raybestos rotors. If so. What are your comments. thanks.

 

I have an 03 Screw and I have the 14mm studs.

Mike

 

Do you have the factory towing package ?

 

12mm studs use 19mm lug nuts. 14mm studs use 21mm lug nuts.

 

97-99 had 12mm studs. 00 up have 14mm studs.

 

Yep, that's for all 97-03 F-150's. -99 use 12mm and 00+ use 14mm studs. Thus, all Screws have 14mm studs, yet they still ask the question. Same happened to me @ Napa.

 

Some of the 00 have 12mm. I believe that some time in October or November 99 was the change over date.

JMC

 

Bingo.

Owner's of early-production 00's have to alert for this difference.

Steve