Chris King 1 1/8" (1.125") headset. For straight, 1 1/8" steerer.
Chris King 1-1/2" 1.5" Headset Baseplate Crown Race Stainless Steel - PHS625
Chris King 1-1/8 Bicycle Headset Sku4277
CHRIS KING INSET HEADSET 1-1/8 - 1 1/2 INCH ZS44/EC44 MM RED WOODMAN STEM CAP
Chris King Blue Headset 1 1/8th Threadless with topcap sku0181
Chris King GripNut - 1" (1 inch) Threaded Headset - Silver - Rivendell Crust
Peaty's x Chris King Tubeless Valves MK2 42mm