Here we have a lovely Shimano 600 Ultegra BB-6400, 68mm x 113mm Road Bike Bottom Bracket with English threads (1.37x24T). Hailing from the 1980s/90s, the bottom bracket is in great condition, the cups and bearings are shiney and the plastic sleeve is sturdy. Prior to sale all parts have been cleaned and degreased and the BB is now ready to fit.
