Industry Nine iRiX IS42/IS52 Headset : IS42/28.6 | IS52/40 Integrated Complete Green Bearing#-6903X The lack of protruding bolts

The lack of protruding bolts and sharp angles guarantees a smooth and safe riding experience

See this explanation for details

Hydraulic Bottom Out Shaft Eyelet Standard Spring Adjustments Preload Damping Adjustments External rebound Low & High speed compression Hydraulic Bottom Out Spring Type Coil Primary Color Black Eye-To-Eye 250x72

With every push

9mm Wall thickness

Industry Nine iRiX IS42/IS52 Headset : IS42/28.6 | IS52/40 Integrated Complete Green Bearing#-6903X The lack of protruding boltsTECH SPECS Headset Position Complete SHIS Lower IS52 40 Steerer Tube 1 1 8 1. 5 Crown Race Diameter 40mm Headset Type Integrated S. H. I. S. IS42 28. 6 IS52 40 Material Aluminum Lower Cup 52mm Bearing Grade Stainless Steel SHIS Upper IS42 28. 6 Upper Cup 42mm Primary Color Green