Shimano UN72 British thread BB – 73 x 113


Legendary sealed bearing bottom bracket with hollow axle

Out of stock


Shimano UN7* series of bottom brackets were part of their top, or nearly top of the range groupsets for road and mountain bikes through the 90s. With a hollow axle, sealed bearings and aluminium cups they were lightweight yet reliable and came in a wide range of threadings and axle lengths for different frames and chain sets.

  • Model: BB-UN72
  • British thread (1.37 x 24) for 73 mm BB shells
  • 113 mm long JIS axle
  • Weighs: 250 grams
  • Suits most Japanese made 90s road double chainsets
  • Mid 90s
  • Made in Japan

Additional information

Weight 450 g
Dimensions 20 × 15 × 10 cm