Ford Focus Forum, Ford Focus ST Forum, Ford Focus RS Forum - View Single Post - Useless TPMS?
Thread: Useless TPMS?
View Single Post
Old 11-01-2012, 06:48 PM   #91
Focus Enthusiast
jsr72's Avatar
Join Date: Apr 2012
Fan#: 97393
Location: n/a, Not Listed
What I Drive: MK III

Posts: 359
Points 189, Level 3
Points: 189, Level: 3 Points: 189, Level: 3 Points: 189, Level: 3
Level Up 78% Completed
Level up: 78% Level up: 78% Level up: 78%
Forum Activity 1%
Activity: 1% Activity: 1% Activity: 1%
FF Reputation: 6 jsr72 Good Standing Member
Buy-Sell-Trade Rating: (0)
Originally Posted by SaToX View Post
Looking at the NHTSA there seems to be conflicting info. One spot it states that the system should indicate when any tire including all four drops 25%. In another spot on the site it seems to be referencing a table that states 20 psi is the safety floor.
The federal safety standard uses both in an overall determination. Whichever value is higher is what is applied to the vehicle.

The lowest placard for any car at the time of the ruling was 26psi.

26psi x 75% ~ 20psi. Hence no vehicle following the 25% rule should ever fall below the 20psi safety floor.
jsr72 is offline  
    Reply With Quote