Just to help anyone looking for 15" LT's (LT255/70/15 in my case), 'c' is 'LT' in 15" size. 'c' or commercial is the same as LT or Light Truck. I have just gone through the process and learned a few things. 1. "search is your friend" was next to useless for me because most of those threads are too old, the new tyres perform differently to the old ones. 2. Most of the opinions are useless because there are always just as many people who hate a tyre as love it. For everyone who says that 'they are too noisy and slip in the wet" someone says "really quiet and grip like a cat on carpet". 3. Most of the tyre sellers don't know enough about their own products let alone the competition to give you good advice. 4. It takes hours and hours to search through old threads looking for that specific bit of info that you want and can't find when someone else knows and is happy to tell you - quickly. I'm sorry mods I am not trying to undermine the good work that you do to keep this site clear concise and helpful, it is just that sometimes when you want some info on a subject which has been done to death, particularly if it has been done to death, sometimes you still do need to ask again but in a relevant existing thread perhaps. But still before you do, search first - that is usually the quickest.
And one more thing I rang around half a dozen of the top tyre dealers in my area asking for LT255/70/15 A/T. and most said that they did not have any LT in that size in their lists. However when I settled on the Bridgestone Dueler D697 255/70/15c because that was the closest I could get, at home I read on the sidewall 'Light Truck'. So 'c' is commercial or light truck, same thing in 15" size. If I (and most of the sellers) had known that earlier, I would have had more to chose from and saved me lots of time. Anyway I am happy with them, to me they are quiet and grip better than the worn out H/T's anyway.