54cm - Top tube center of headtube to center of seattube is about 53cm. Bottom bracket center to top of seat tube is about 50cm. Rear spacing is 130mm, headtube is tapered 1 1/8 - 1.5. Head set comes with sealed bearings.
Bottom bracket is a sealed FSA BB30 (comes with bearings and spacers) Frame is in great condition, just a few small marks. Takes caliper style brakes only. Comes as shown with headset and bottom bracket. I'm including the old cables so it will make it easier for you to route the new ones through the frame.The item "Specialized Roubaix SL4 Sport Carbon Road Bike Frame & Fork 700c 54cm Zertz" is in sale since Tuesday, June 23, 2020. This item is in the category "Sporting Goods\Cycling\Bicycle Frames". The seller is "lojack13" and is located in Newark, Ohio. This item can be shipped worldwide.