For anyone who has one or has ridden one- how do these size? I am currently riding a 56 bareknuckle and trying to decide between a 55 and a 57 pista concept. Thanks.

bareknuckles seem to run big, i would say 57.

57

are you keeping the barknuckle? *hint hint*

Haha I am keeping it. You can peep it here:

https://www.velospace.org/node/8465

I need a second less expensive bike to travel with but I am getting conflicting info from friends. A lot of people have told me pista concepts size big too so I'm a little confused.

Dang, I mean, I've already got one but...2 would be twice as nice...
I'm glad your keeping the knuckle, I love mine.

edit:
as far as I know, bareknuckles have rediculous standover etc so I think you'd be ok with a 57 pista concept. Look at the dimensions for the sizes online and find the one closest to your fit.

I love it dude, I am actually scared to get a diff frame because I can't see myself like anything better.

I feel you.
I'm considering building another bike as well in the upcoming months, but am in the same boat as you.

Aren't both of these frames currently about the same price?

No Concepts come in a 61cm, correct?

Yes, you are incorrect.

I'm 6'1 and I ride the 57 if that helps, but if anything best way would be to goto your LBS and get correct sizing.

Is that a yes or a no?

hyphy!

Fixed.