SHIMANO 600 FC-6207 22mm Bottom Bracket Dust Cap Vintage Bike CP16

The SHIMANO 600 FC-6207 bottom bracket dust cap is made of steel and measures 22 mm across. It was manufactured in Japan for the SHIMANO 600 groupset., and it shows oxidation — a point detailed in the technical specifications below and visible in the photographs, which form part of the description. Such marks are common on period steel hardware stored for decades. They do not alter the part's function or its fit.

What this dust cap is and where it belongs

Bottom bracket dust caps sit at the junction between crank and frame. They shield the bearing assembly from road grit and moisture. The FC-6207 reference ties this cap specifically to the SHIMANO 600 series. The declared diameter of 22 mm is the key figure to compare against your existing cup or crank opening before ordering.

Key benefits

• Steel construction — the material declared for this cap, matching the original SHIMANO 600 specification.
• 22 mm diameter — the exact measurement stated for this part, to be checked against your crank assembly.
• Made in Japan — country of origin declared for this component.
• Period-correct FC-6207 reference — intended for builds that keep the original SHIMANO 600 drivetrain.

Technical specifications

• Country of origin: JAPAN
• Oxidation: Yes
• Material: Steel
• Manufacturer part number: 0000
• Dust cap diameter: 22 mm

Condition notes

Oxidation is present on this dust cap and is recorded in the specifications above. Photographs accompany this listing and form part of the description. Because this is a used component, minor cosmetic marks and traces of long-term storage — micro-scratches among them — may also be observed.

Building a period-correct drivetrain

Small hardware like this rarely travels alone: a restoration usually pulls in several components at once. For the transmission side, a SIMPLEX Super LJ rear derailleur pairs naturally with French frames, while a HURET Jubilée front derailleur covers the other end of the same era. Browse the full derailleurs range if you are assembling more than one build at a time.