Primo Tapered Integrated Headset Color:Black Thicker side walls to reduce

Thicker side walls to reduce denting

The FR-6 has four notches approximately 32mm across measured inside to inside          and 40mm outside to outside

Made in the USA from 100% 4Q-Baked heat-treated 4130 chromoly

Designed with a more ramp/park/trails geometry than their other frames

Primo Tapered Integrated Headset Color:Black Thicker side walls to reduce2 sealed cartridge bearings. Alloy dust cover with an internal O ring for a snug fit and laser etched Primo logos. Includes bottom race. Upper bearing is standard 1 1 8" Lower bearing is oversized 1. 5" Designed for Stranger's Ballast Evo frame, but will also work with a variety of MTB dirt jumpers with tapered head tubes. *Compatible with TAPERED 1 1 8" to 1. 5" integrated head tubes only.