Full Speed Ahead Headset Guide For 1-1/4" and 1-1/2" Standard 52.5 - Vivid C1+ (2024+) Boost: 3mm offset for 52mm

Boost:  3mm offset for 52mm chainline or Transmission compatibility with Super Boost bikes

Utilizing Stans patented Bead Socket Technology combined with a stronger asymmetric design for balancing control and weight the Arch MK4 your best choice for all-around riding

9 • 601g | 242 x 31

Same overall diameter as a 700c x 30 tire

Full Speed Ahead Headset Guide For 1-1/4" and 1-1/2" Standard 52.5 - Vivid C1+ (2024+) Boost: 3mm offset for 52mmStainless steel measurement tool has gauges for all current headset bearing standards (Campagnolo, Cane Creek, TH FSA) Includes inside gauges for head tubes and cups and outside gauges for bearings TECH SPECS description 1 1 4" and 1. 5" headset and head tube measuring to