What is an LT tires ?
1. Lt tires explained
LT-metric (Light Truck) tires are specifically engineered to work with trucks, full size SUVs and Vans. Including also 1/2 ton, 3/4 ton and 1 ton load capacity.
An LT tire is basically a reinforced tire with extra steel belt, thicker, stiffer sidewalls and a deeper tread. They are meant to perform better while hauling, working and driving on non paved roads.
LT tires are available in a variety of ply levels that are typically Load Range C (6 ply), D (8 ply), or E (10 ply). Commercial truck-bus tires are usually on Load Range F (12 ply)-G (14 ply).
Comparing to a passenger (P-metric) tire who will mostly be in a B (4 ply) or C (6 ply).
2. What are the advantages and disadvantages of LT tires
The stiffer sidewalls provide more stability while hauling loads or driving off road. LT tires also have extra material in the sidewall and under the tread that protects the tire from damage.
In the other hand, LT tires won't ride as smooth, be as fuel efficient or last longer than a regular P-metric (Passenger)tire.
3. In which case should I use an LT tire?
If your truck came equipped from the factory with p-metric tires and you rarely go off paved roads and/or rarely pull or haul loads, you can continue with a P-metric (Passenger) tire. They will ride smoother, last longer, and be more fuel efficient than a LT rated tire in the same size.
On the other hand, if your truck, full size SUV or Van came from the factory rated for LT tires, it is best to replace the tires with LT tires. P-metric(passenger) to LT (light truck) is acceptable, but never replace original LT tires with P-metric tires due to them having lower load capacity ratings at maximum air pressure.
4. What is the difference between Ply rating and Load rating?
They are terms used from a different era in the tire history, but they mean the same thing. Ply rating is referred to a given letter (C to G) where, back then, they were using to say how many layers of compressed cotton fabric there were in the LT tire.
In today's modern technology, tire plies aren't made of cotton anymore but with other compounds and materials that are much stronger and the number of plies isn't the same as back then.
We currently use the load rating to find the right tire. If you see ply rating and load rating on a chart, they both represent the tire's maximum load carrying capacity at maximum allowable air pressure.
5. Can I choose a different type of tire on my vehicle?
Regardless of whether you’re changing tire sizes or want to switch the type of tire you’re using, it’s essential to ensure the load rating listed on the new tire’s sidewall is either equal to, or greater than, the load rating of the tire you’re replacing.
ex: a 275/65 R18 *123S* can be replaced by the same 123 load rating or by a 275/70 R18 *125R* as the load rating would be greater than what is recommended by the manufacturer.