Square Type Bottom Bracket

BB-UN300-K

Square Type Bottom Bracket

BB-UN300-K

SHIMANO - Square Type Bottom Bracket - MTB - Chain Case Structure

Square Type Bottom Bracket

FEATURES

  • SHIMANO quality/performance cartridge bearing square bottom bracket
  • Better chainline stability with chain line stabilizer
  • 3 structures available
  • Standard, E-type, chain case options
  • Adapter material: Aluminum

PRODUCT SPECIFICATIONS

MODEL NO BB-UN300-K
SERIES SHIMANO ACERA M3000 Series
Remarks * w/ Crank arm fixing screws spec. only ** w/ Crank arm fixing screws spec. is available *** w/ 0.7mm spacer
Structure|For chain case
Spindle|Square type
Axle length/shell width (mm)|MM110|68 (BC1.37)
Axle length/shell width (mm)|117.5|68 (BC1.37)
Axle length/shell width (mm)|XL118|68 (BC1.37) X *
Axle length/shell width (mm)|D-NL 122|68 (BC1.37) X **
Axle length/shell width (mm)|D-EL 127|68 (BC1.37)
Axle length/shell width (mm)|LL123|68 (BC1.37) X ***