F450 vs F350 SRW payload
I'm looking at the technical specs of the 2020 Super Duty and found the F450 4x4 has a curb weight of 8,587 lbs which is 855 lbs more than the F350 SRW crew cab long box with the 6.7 Powerstroke. The ...
Forum Discussion
carringb wrote:
"I don't agree with the idea that overloading tires means imminent tire failure at high temperature and speed as I've found there to be a pretty large safety factor incorporated into tire ratings. "
Tire rating really don't have any safety factor designed in . But it's important to remember that heat is a function of Loading AND Speed. Most of us are not running at full loads anywhere near max speed ratings (which are validated for 30 minutes). On that note... Ford worked with Continental originally to produce a 19.5" tire with a a higher speed rating, specifically for the F450, and now other tire makers are matching that. The original F450 was governed at 75 MPH due to the tires, which caused some buyers to "downgrade".
Not sure I agree with tire load ratings not having a factor of safety applied to them.
As an Engineer, I can't think of a single assembly or component of most anything that isn't designed with a factor of safety. With the exception of intentional "weak links", for example shear pins. You want to rely on it breaking at a certain stress to protect the rest of the assembly from overloading.
I'll say tires 100% have a substantial factor of safety built into their published load ratings.
