hello all... new member, first post
I'm 5'11" with long legs and I ride 58 cm Cannondale road bike and cross bikes. Standover is higher on the cross bike because higher BB and larger tires [without going to my garage and measuring the differences I'd say my cross bike has a standover height 2-3 cms taller than my road bike, not a biggy] . Proper bike fit examines 1) top tube length taking into account a reasonable stem length, 2) seat tube length, 3) "standover", and 4) the overall feel and ride characteristics. It's most important to ride the bike before purchase. I have the impression you have your questions because you haven't ridden the bike yet.