Both C-Type tires and LT (Light Truck) tires are generally rated for a higher weight capacity than standard passenger tires. However, they are meant for two different specific vehicle applications. LT tires have a load range rating typically of C, D, or E. Though some LT tires have a C in their description denoting load range C, this is not the same as a C-Type tire and cannot be used interchangeably.
Both of LT and C-Type tire types are reinforced to carry a heavier load than a typical passenger car tire. However, the C-Type tire is meant to handle a heavier load than an LT tire in equivalent size, though generally rated for a lower speed.
LT tires specify a letter code to denote the load carrying capacity of the tire based on load and inflation tables from one of the standards organizations (Tire & Rim Association, ETRTO, JATMA, etc). Common LT load ranges include C, D, and E – as the load range increases, the load rating increases commensurately.
The C-Type tire, on the other hand, is specifically meant as a commercial-rated tire, with a higher load rating for a given size than many LT tires. These C-Type tires will show the letter “C” immediately after the wheel diameter in the tire code. Example: 225/75R16C