Headset cups, chrome, pair
OD cup bottom side 30mm gradually to 30.15mm (1 3/16")
OD cup top side 41.3mm or 1 5/8"
Bottom of each cup inserts into a frame head tube with 30mm or 1 3/16" ID
Use with headset bearings Type A
Fits many 20" bmx style frames and some lowrider frames that have a slightly smaller head tube and use a 21.1mm headset.