Hi,

I'm looking to change the tires on an older boat trailer. The existing
tires have seen far too much weather and are cracked which would make them
extremely unsafe. Looking at them (and not being a trailer expert) they
indicate the size as being "A 78-13". From that scale I'd assume that means
13 inch tires, however, in regards to the rest of the sizing I'm a little
unsure. When going into the store I saw many tires, but none with this kind
of scaling. I believe this is the "old" way.

My question then is what is the comparable size to "A 78-13" in the commonly
used sizing now (Canada).

?

Cheers