Tire load range and pressures

[Regcabguy]

I’m sure I didn’t ask the correct question.
Is it ok to run 35lbs of pressure in an E rated tire for daily driving on a F150? That’s the recommended pressure on the door jamb tag.

Absolutely. I don't know why manufacturers insist on supplying passenger car tires on LT trucks with some exceptions. The E's will be way stronger and more flat resistant.

 

[AMTRV]

An SL tire @ 35 psi carries more weight than an equal size E-rated @ 35 psi.

The best is to look up what your OEM tires carry @ 35 psi, then on Nitromethane's table, find an E-rated size that carries the same load @ 35 psi. You may have to upsize, which you plan on doing regardlesss.

I'd guess the 275/80R18 size, 2535 psi @ 35 psi, is a good fit.

Thanks Roy, but I’ve never seen that size. It does sound interesting though. I see Kendra makes one?

 

[RoyJ]

Thanks Roy, but I’ve never seen that size. It does sound interesting though. I see Kendra makes one?

Rare indeed. Here's another option:

https://www.tirerack.com/tires/tire...QR7WMTRK&vehicleSearch=false&fromCompare1=yes

 

[Grassland]

275/70R18 and you don't need new wheels.

 

[javajoe79]

Absolutely. I don't know why manufacturers insist on supplying passenger car tires on LT trucks with some exceptions. The E's will be way stronger and more flat resistant.

Probably because they’re completely adequate for most people plus they ride better. They’re not using a more expensive tire, just because.

 

[billiebob]

I’m probably going with a E rated tire because there are not many choices in a SL tire. Probably will go with 285/70 18. I had E rated 285/75 18s on all of my previous trucks because they were all Superdutys. Never had a problem with flats or cut sidewalls. This 1/2 ton changes everything. I want to keep the nice ride but also want to keep the strength needed to handle the rough trails that I encounter on almost every excursion.
Thanks for the above information. At least that answered my questions.

so capability, strength, all you need on an F150 is a C Rated tire. E Rated will be tougher and heavier, giving a less compliant, rougher ride, this is a fact of physics. Tire choice is always about compromise

every tire has a spec sheet on capacity, that is your best resource, pick the tire with the correct capacity, the decide if you want a tougher, rougher riding tire.

ps, more important than C/D/E Rating, is tire weight. Increase the unsprung weight exponentially creates a rougher ride. I went from C Rated 33x10.50R15s to D Rated 7.50R16s and lost 8# per tire even tho I went from C to D, The ride is exponentially smoother, And the gas milage increased from 17mpg to 22mpg. Compromise, guys laugh at my skinny tires but I no longer need to carry 5 gallons of extra gas. Pick the compromise important to you.