KCNC PT1860 Taper Steerer Headset (IS42 : IS52)

Replacement FSA No.42 ACB  fully integrated headset for head tubes designed for tapered steerers.  Upper bearing is  1 1/8" Campy style 45°/45°, lower bearing is 1.5" 36°/ 45° ACB

• [SHIS IS42/28.6 : IS52/40]
• 6061 alloy bearing cover and top cap with o-ring and rubber lip seal
• Stainless steel bolt
• Split Crown Race : Ø40mm CNC'd aircraft grade aluminium
• Bearing size Upper : ID Ø28.6mm x OD Ø41.8 x 8mm - 45°x45° Campy    -  1 1/8" 45°/ 45°ACB
• Bearing size Lower : ID Ø39.8mm x OD Ø51.8 x 8mm - 36 x 45°      -  1.5" 36°/ 45° ACB
• Stack Height : 9 +1 mm
• Compatible with FSA No.42 ACB
• Weight : 76g (excluding top cap & bolt), 102g (including top cap & bolt)