Drilled 1" Keyed Headset Washer/Spacer for Threaded Steer Tube: 2mm

For the weight weenies who want to shave a few grams, this is a cheap upgrade! This is a drilled keyed spacer to fit beneath your top nut on 1" threaded headsets.  It is required for fork steerers that have a slot down one side of the threads. ...

OMAS Big Sliding Alloy Headset Top Locknut: 1" Threaded (BSA) - 8g - Campagnolo Nuovo/Super Record Upgrade!

O.M.A.S. is famous for their Campagnolo Record / Super Record upgrade parts, nuts, and bolts.  They produced these parts mainly from 1978 through the early 80's. This is from their flagship Big Sliding headset, and it is also used as a direct...