Industry Nine iRiX ZS44/ZS56 Headset : ZS44/28.6 | ZS56/40 ZeroStack Complete Purple Model=Progressive VALT Spring Ring Position/Type Chain Retaining Single B-VR7051-B Size:130 CheckoutSpec= Includes Bracket and Titanium Bolts 40 Tubeless Technology Tubeless

Industry Nine iRiX ZS44 ZS56 Headset : ZS44 28.6 ZS56 40 ZeroStack Complete Purple Model=Progressive VALT Spring Ring Position Type Chain Retaining Single B VR7051 B Size:130 CheckoutSpec= Includes Bracket and Titanium Bolts 40 Tubeless Technology Tubeless Ring Position Type Chain Retaining Single Ring Tooth Count 28 Round or Oval Round Drivetrain Speeds 9 Drivetrain Speeds 10 Drivetrain Speeds 11 Drivetrain Speeds 12 Offset 3 Chainline Hub Compatibility 135 142 MTB Hubs Chainline Hub Compatibility 170 177 Hubs Chainline Hub Compatibility 150 157 DH Hubs Chainline Hub Compatibility 157 Super Boost Hubs Chainline Hub Compatibility 141 148 Boost Hubs Material Aluminum Defined Color Black Direct Mount Type Direct Mount SRAM }Pirelli Cinturato Velo TLR Tire 700 x 32 Tubeless Folding Black