This campagnolo chorus 102mm bottom bracket has three sealed cartridge style bearings two on the chainring side and one on the non drive side removable cups are machined from 7000 series aluminium alloy and are easily replaceable and weighs just 220 grams which is only 30 grams more than record with a 17 mm cro moly steel 102 mm hollow spindle that fits 8 9 and 10 speed campagnolo record and chorus cranks from 1995 to present the taper is unique to campagnolo and is not interchangeable w