It's adjustable. But the frame it's self is big. And the geometry meant to be more aero. I've done what I can to make it feel comfortable to me, I shortened the stem to a 50mm and my seat is about 3/4 of the way up. I can consistently go 18-20 mph on this bike. It's all carbon fiber so very very light weight. It's a 10 speed, which is plenty for me to ride on mostly flat terrain.