The headtube will have angled sides to take the bearings of an integrated headset. You should be able to read on the bearings what they are to tell you what headtube dimensions you have. It's the 1, 1 1/8 45x45 45x36 36x36 and so on like in this pic.
From that you can find a headset that fills the gaps maybe.
The headtube will have angled sides to take the bearings of an integrated headset. You should be able to read on the bearings what they are to tell you what headtube dimensions you have. It's the 1, 1 1/8 45x45 45x36 36x36 and so on like in this pic.
From that you can find a headset that fills the gaps maybe.