If I write "R", it sound like "ar". Right?
You would read "RG" like "ar ji".
So I have to write "a R" or "an R"?


Why? Because when pronocing R, whether it's "or" or "ar", the first letter is a vowel.
Friends, applaud the comedy is over.

I'd dance with you but...

An 'R'. The an/a thing doesn't go with single letters, as single letters themselves can only be used when referring to the single letter which doesn't happen often.

It's best to say 'a letter R'.
<Dobzilla> because "when you were born, they thought yo' momma shit herself."
<Frehnchy> ...
<esther_mouse> ...
<Rankles> ...
<RaNdOm-FeLiX> ...
Ok thanks peeps. I always had that question. Used to write "I want a RG2570" for example.