Promax IG-45 alloy sealed integrated 45X45 1 1/8' headset

Used by Marc Willers and World Champions Caroline Buchanan, the IG-45 integrated headset features an aluminum cap, bearing cover and crown race with super-smooth rolling, precision 45×45 bearings. Available in anodized red, blue, gold and black, in 1” and 1 1/8” sizes. 1”-PX-HS1300IN1: 94 grams/3.31 ounces 1 1/8”-PX-HS13IN118: 85 grams/2.99 ounces