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The Universal Derailleur Hanger consolidates thousands of hanger options across the industry
Benno Rail Clamp Set is required for installation and sold separately
and properly assembled
1000D nylon
Trek Knock Block Complete Headset Assembly yc-335 The Universal Derailleur Hanger consolidatesCompatible with all Trek Knock Block models Includes crown race, bearings, top cover, frame chip & fastener Must be paired with Knock Block stem and Knock Block spacers Knock Block headset spacers not included Steerer outer diameter: 28. 6mm (1 1 8") 38. 1mm (1 1 2") Crown race inner diameter: 39. 8mm Upper Bearing: 30. 2 x 41 x 6. 5mm Lower Bearing: 40 x 51. 8 x 8mm Stack height: 8. 7mm
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