Primo Tapered Integrated Headset Color:Black - Heat treated 6061 –

- Heat treated 6061 – T6 alloy with welded seam

and 18th - 1

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

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

Primo Tapered Integrated Headset Color:Black - Heat treated 6061 –2 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.