GIANT ROAD OVERDRIVE HEADSET 1 1/8" TO 1 1/4"

FITS MODELS;
- All Giant road bikes with Overdrive headtubes 1 1/8" to 1 1/4" diameter

UPPER BEARING 1 1/8" 45° X 45° 870# ACB 41.8mm ø
LOWER BEARING 1 1/4" 45° X 45° 970# ACB 46.8mm ø

GIANT PART NUMBER: 490900

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