Three sealed cartridge style bearings two on the chainring side and one on the non drive sideweighs just 220 grams only 30 grams more than record17 mm cro moly steel 102 mm hollow spindle fits 8 9 and 10 speed campy record and chorus cranks from 1995 to presentunique taper is not interchangeable with shimanoremovable cups are machined from 7000 series aluminium alloy and are easily replaceablecomes with british 137 inches x 24 threads per inch or larger diameter italian cups 36 m