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Vintage steel fork 166mm steerer profile view
  • Vintage steel fork 166mm steerer profile view
  • French thread 25x100 detail on steel steerer tube
  • Vintage bicycle fork crown and blade alignment
  • Dropout spacing 100mm measurement view
  • Steel fork crown race seat close-up
  • Left blade vintage patina and finish details
  • Right blade condition and vintage dropouts
  • Steerer tube length verification measurement
  • Internal view of the fork crown lug structure
  • Top view of French thread 25x100 entry
  • Fork blades curvature profile for 650B and 700C
  • Under-crown brake mounting hole detail
  • Rear view of the vintage steel steerer tube
  • Left dropout eyelet detail for mudguard mounting
  • Right dropout vintage stamping close-up
  • Overall front alignment view of the steel fork
  • Overall side profile of the classic bicycle fork
  • Overall rear perspective of the vintage fork
  • Lower leg detail showing clearance for 700C tires
  • Weight and balance inspection of the vintage fork

Steel fork 166mm for 25.4×100 frame 700C/650B

This vintage steel fork, featuring a 166mm steerer and French 25x100 threading, is built for 700C and 650B vintage frames. Ideal for restoring a classic touring bike. Please note that the photos form part of the description.
€10.00
VAT included
Quantity
Last items in stock
1 Item

Description

This classic vintage steel fork is engineered for high-durability retro assemblies, providing excellent structural alignment and standard vibration damping for 700C or 650B wheel standards. Tailored for classic French geometry configurations, this component is essential for completing a traditional touring bike or city commuter build with period-correct technical specifications.

Key Technical Advantages

Constructed from resilient steel tubing, this fork features vintage 25x100 threading designed to integrate seamlessly with matching French headsets. The structural integrity of the blades ensures reliable tracking and steering feedback, whether deployed on rough gravel or paved urban tracks. Minor cosmetic wear, surface storage marks, and micro-scratches are present as expected on authentic used cycle parts, with the exact cosmetic condition documented in detail across the product gallery. The photos form part of the description.

Technical Specifications

  • Thread (fork): 25X100
  • Fork steerer (in mm): 160 -170 (measured at 166mm)
  • Wheel Compatibility: 700C / 650B

Restoration & Compatibility Notes

Before ordering, verify your headtube length to ensure the 166mm steerer provides sufficient thread engagement for your locknuts. For builds requiring alternative dimensions, we also supply the Steel Fork 163mm Steerer for 25×100 Frame and the slightly taller Steel Fork 186mm Steerer for 25x100 Frame to match different vintage frame sizes.


FAQ

What headset standard is compatible with this fork?

This fork features a French 25x100 thread standard. It requires a French-threaded headset with a corresponding 25mm inner diameter rather than standard ISO or Italian thread options.

Will this fork fit a standard 700C road wheel?

Yes, the brake drop and clearance are designed to accommodate both 700C road wheels and 650B vintage wheelsets.

What is the exact steerer tube length?

The steerer tube measures 166mm in length, fitting within the standard 160mm to 170mm range specification for classic bicycle frames.

Product Details
1 Item
Used

Data sheet

Thread (fork)
25X100
Fork steerer (in mm)
160 -170
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