Light Truck and LT Tires

The LT prefix on a tire size means light truck construction, and the difference from a P-metric passenger tire is structural rather than cosmetic. LT tires use more plies, stiffer sidewalls and heavier belt packages so they can hold higher inflation pressure, and higher pressure is what allows higher load capacity. An LT tire in the same nominal size as a P-metric tire will carry significantly more weight and resist sidewall flex under load.Load range is the shorthand for that construction. Load range C is roughly a 6-ply rating and handles moderate loads. Load range D is roughly 8-ply. Load range E is roughly 10-ply and is the common choice for three-quarter-ton and one-ton trucks and for anyone towing seriously. Load range F is roughly 12-ply for the heaviest applications. The ply rating is an equivalence, not a literal count of plies in a modern radial.Choose LT over P-metric when:You tow a trailer regularly, especially anything over about 5,000 poundsYou haul weight in the bed or run a camper or service bodyYou run off-road and air down, where a stiffer sidewall resists pinch flatsYour truck is three-quarter-ton or heavier, where LT is usually the factory spec anywayThe tradeoff is ride quality and weight. LT tires ride firmer, weigh more, and cost some fuel economy. If your half-ton never sees a trailer and never leaves pavement, P-metric will ride better and serve you fine.