The TD features cups and cones that work together with a simple Oring to seal out contaminants and increase the headset's life expectancy. 18 unique parts in the Aheadset system can be configured to make 11 unique headset assemblies, including a ZeroStack threaded 118 12mm insertion depth and 3mm leadin for easy installation Both the TD and TD1 use the same 118 highcomplement caged ball bearings Adjusting cone can be adjusted using an external bottom bracket wrench, hooks
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