Ritchey WCS Headset Upper Cartridge 15mmTopCap ZS44/28. MFPN=11.5018.046.016 The plunger was nylon with

The plunger was nylon with a drive screw for the tip

The Fidlock TWIST Deluxe includes the Universal Base for mounting to bikes without standard braze ons

}Wheels Manufacturing Extended Derailleur Hanger

Compatible with 5-to-12-speed derailleur chains that use a master link including SRAM AXS and Shimano XTR 12-speed

Ritchey WCS Headset Upper Cartridge 15mmTopCap ZS44/28. MFPN=11.5018.046.016 The plunger was nylon withSemi integrated sealed cartridge bearings with alloy cups that press into the head tube Upper includes top cap Lower includes crown race Model WCS Upper S. H. I. S. ZS44 28. 6 Stack 15mm Upper Lower Upper Color Black Weight 49g Type Upper S H I S ZS44 28. 6 Stack Height 15Mm