Tires: Tires, range c, load c

Question
I have a boat trailer and need to replace the 4 tires, but I cannot find the size. The sidewall on the tire states "special trailer tire" 7.75 14st load "c". Can you tell me what the conversion would be on these tire?

Answer
Shaun,

You found the tire size.  It is 7.75-14ST Load Range C.  It's an old system and here are the particulars:

Diameter = 25.24", Width = 7.65" on a 5.50" rim, Load Carrying Capacity = 1655# at 50 psi.

The current sizing system is different - and the closest match is ST 205/75R14 Load Range C

Diameter = 26.14", Width = 7.99" on a 5.50" rim, Load Carrying Capacity = 1760# @ 50 psi.

It's a little larger in diameter and a bit wider, and has basically the same load carrying capacity, so it is likely it will fit.