Ritchey Pro Logic HeadsetIf you're looking for a standard threadless headset, Ritchey's Pro Logic is a solid and reliable option that won't break the bank. High quality alloy cups and sealed bearings make this headset a "set it and forget it" component. The Pro Logic is equally suited for road or mountain use. The total stack height is 35mm and total weight including star nut, top cap, compression bolt and crown race is 136g. Size is 1 1/8.