5″inch Sealed Cartridge Bottom Bracket Square Taper Black or Silver
127.5mm Long, modern updated bottom bracket, square tapper ends.
Euro Threaded, will works in new GT frame threaded bottom bracket.
Material: CNC aluminum, Steel, Rubber shields
Threading: 1.370″ X 24 tpi
Threaded cups come off and thread in with Park Tool BBT-32
Need Park Tool BBT-32 to install.