Headset - Tange/IRD NeedL BlastR
All of this goodness encased in a really lovely set of cups, made and lustrously finished in Japan, by Tange. Fits all of our bikes and most but not all bikes that require a one-inch threaded headset. (Detail: Fork crown race 26.4, head cup 30.2. Most pre-'87 Asiatic bikes are 27/30, so no go. It is hard to imagine it ever wearing out. There are steel floating races, the bearings are replaceable, it’s just---really, really good.
The Tange Roller Drive headset is on the left and that's a "normal" ball bearing headset on the right.
AKA IRD RollerDrive Threaded Headset