The Hope Stainless Bottom bracket comes in a huge variety of sizes and colours. The cups are machined in the UK and into these are Swiss made bearings with double seals. Hope have used a non-contact labyrinth seal to externally protect the bearing and the machined aluminium (not plastic!) sleeve is sealed internally with o-rings. The Hope bottom bracket is available in 68/73mm (standard), 83mm (DH) and 100mm (fat bike!) widths. This is a great choice of bottom bracket which performs over and above the stock Shimano or SRAM units.