bicycleheadsetsizes

Headset Diameter · 1-1/8-inch (most common) · 1 inch(typically older frames and forks) · 1.5 inches (downhill bikes) · Conical (1-1/8 top cup / 1.5 bottom).

You can determine the required outer diameter of the headset by measuring the inner diameter of your head tube. © bc GmbH. The second number: the inner diameter.

2018年2月8日 — Bearing cups outer diameter (marked as “TT” in picture 2) is 30.2 mm. Head tube inner diameter (“TT” in picture 2) is 30 to 30.15 mm. Steering ...

Sheldon Brown's Bicycle Headset Dimension Crib Sheet · 1 1/8 · 1 1/4 · 21.15 mm · 1 1/8 · 1 1/4 · 52 mm · 55 mm · 56 mm

Traditional bicycle head tubes and headsets are sized for a 25.4 mm (1 in) diameter steerer tube (also known as the fork column). Many frame and fork ...

If you have the stock or original headset bearings, you can measure the outside diameter of those bearings to be sure. You'll likely find numbers like: 41mm, ...

2023年4月23日 — The standard sizes are 1 inch, 1 1/8 inch, 1.25 inch and 1.5 inch steerers. You may occasionally come across a 1-inch threadless steerer, but ...