Ritchey Logic Threadless Headset A good-quality headset need not break the bank. With durable steel upper and lower cups, these will last for years and years with minimal service. Features5/32" upper bearings, big 3/16" lower bearings Claimed 131 grams (1 1/8" threadless type)Stack height 26. 5mm | Ritchey | Logic Threadless Headset | Black | 1 1/8", 28Mm