I am not sure if it was you that asked about what tires I have on my tow dolly or not, but when I bought this master tow dolly the person that I bought it from has just installed Vanguard STR tires on it they are Power King Premium ST 205/75R14 that say Trailer Service Only on them. I forgot to look what rating they are but if you need that I can grab it for you.
If you didn't ask for this information please forgive me as I don't often check my profile comments and not really great in getting around in the forum.
The dolly that I have has surge brakes.