External BSA threaded options of Hope's stainless steel bottom brackets. Oversized 30mm option for hope cranks. Other models are standard 24mm for Shimano cranks. The machined aluminium cups hold full stainless steel cartridge bearings. These custom, Swiss made bearings are double sealed, fully serviceable and removable which give much greater life span than stock units. The bearings are made (as all our bearings are) by INA and have been designed to run directly on the crankset axle, without the use of shims or spacers - again increasing life and reliability. We use a non contact, free running labyrinth seal to protect the bearing externally, and the machined aluminium centre tube is sealed internally with o-rings. The unit is suitable for 68, and 73mm shell width. Standard 6 colours are available on cups - red, blue, silver, black, purple and gunmetal, with the centre tubes being black. Weight approx. 113g.