Cane Creek 40-Series Steel 52/30 Conversion Crown Race

The Cane Creek 40-Series Steel 52/30 Conversion Crown Race is a precision adapter that allows you to install a 30 mm (1-1/8″) straight steerer fork using a 52 mm lower headset bearing—without needing to replace the lower races. Designed for cyclical compatibility, it's a seamless fix for varied setups.

Specs at a Glance

• Compatibility: Works with 10-, 40-, and 110-Series Cane Creek headsets; also backward compatible with S and XX Series
• Lower Bearing Size: 52 mm
• Steerer Tube Size: 30 mm (1-1/8″) straight steerer
• Material: Durable steel with integral molded seals to keep contaminants out
• Compatible Lower Assemblies: EC44, EC49, ZS56, etc.—where 52 mm bearings are used

Key Benefits

1. Resourceful adaptation: Enables use of smaller straight steerer forks in place of tapered versions without rebuilding the headset.
2. Broad compatibility: Supports multiple Cane Creek series and legacy standards, simplifying inventory and maintenance.
3. Long-term durability: Steel construction with integral seals enhances resilience against dirt and moisture.

Final Take

The Cane Creek 40-Series Steel 52/30 Conversion Crown Race is the ideal solution for adapting your headset to smaller steerers without swapping the entire lower cup assembly. A practical, durable, and cost-effective part that keeps your setup adaptable and clean.