The hub drilling is the number of spoke holes. It must match your rim spoke count.
This should correspond to the type of brakes you have on the bike.
12 x 157 axles are often called "Super Boost"
This is the part number or identifier for this item from the manufacturer
We define color as the main color of the item. It may have accents or highlights in other colors.
12mm Thru x 148 thru axles are often called "Boost"
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