09/02/2026
Somebody calls a 265/70R18 a 33 about twice a week around here. It is a 32.6. That four-tenths of an inch does not matter until you are working to a clearance number, and then it is the only thing that matters.
Here is the bigger one. This size comes in three versions. P-metric, Euro-metric, and LT Load Range E. They all stand 32.6 inches tall and they are not the same tire. Between the lightest and the heaviest there is over 900 pounds of load capacity per corner, and P-metric tires get derated again the moment you bolt them to a truck.
Hank walks through all of it: the real measurements, why it is not a 33, which version your truck actually needs, what LT costs you in ride and speed rating, and how much taller a 70 really is than a 65.
Read it here: https://www.performanceplustire.com/Blog/265-70r18-tire-size