I'm 6ft

58cm is sometimes too large for me

My SS road bike is a 56cm and the handlebars are the heightest I can come and my seat is half way up. More for comfort.

My road bike is a 54 with the handlebars high and seat post high also. It barely fits me.

A 52,54 and maybe a 56 might fit you, but there is no way a 58 can.