It's an 80mm. My knees clear the bars on a standing climb on this 54, on my 52 my knees did hit the bars. This 54 fits fairly well but I can't get the KOP anywhere near right. All the branded bikes I've owned I have had to make compromises to get them to fit. I want an endurance/race frame, something in the middle that I can ride a century on and also race crits. Here's a pic of my current bike, it fits okay but not perfectly: