Steel fork 138mm steerer for 25x100 700c/650b bicycle frame

This second-hand steel steering component is designed for classic French frame geometries utilizing metric standard dimensions. Engineered for 700c and 650b wheel sizes, it provides an authentic solution for restoring vintage city machines or a classic touring bike. As a pre-owned component, minor cosmetic blemishes, shelf wear, or micro-scratches may be present. The product photos show the exact physical condition of this piece and are an essential part of its description.

Technical Specifications & Compatibility

Finding a secure, period-correct match for French frames requires exact metric sizing. This fork operates on a French metric thread pattern, making it highly specific compared to later ISO or Italian standards. For frames requiring different steerer heights, you can also explore our Steel Fork 163mm Steerer for 25×100 Frame or the slightly shorter Steel 153mm fork for 25×100 Frame.

Technical Specifications

• Thread (fork): 25X100
• Fork steerer (in mm): 130 -140

Restoration Value & Sizing

Before purchasing, confirm your frame's headtube height matches the 130mm to 140mm steerer range to allow sufficient clearance for your headset stack height. The 25x100 threading is distinct from modern 1-inch standards and is critical for authentic French builds from the mid-to-late 20th century.