Guys,i hope to get some feedbacks from you all.Now i am using a 50cm size road frame.I am thinking to get a new frame from a shop.But he only got the 2 kind of size(the bike which i really like)model to be choosed.1 is 52cm(i can use it but its abit suffering when doing speed chasing.And 1 more is 47cm.Now i am using my frame and i think it fits me perfectly.If i grab any 1 of it how will it be changes on my ride?Can anyone tell me please? Thx alot