Square Type Bottom Bracket

BB-UN300-K

ACERA_M3000_m

BB-UN300-K

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

Square Type Bottom Bracket

  • 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 ACERA M3000 Series
Remarks * w/ Crank arm fixing bolts spec. only ** w/ Crank arm fixing bolts spec. is available *** w/ 0.7mm spacer
Structure_For chain case
   
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 ***
Axle length/shell width (mm)_MM110_68 (BC1.37)
Spindle_Square type

SERIES LINE-UP

  • Bottom Bracket Square Type Bottom Bracket
  • Bottom Bracket Square Type Bottom Bracket
  • Pedal SPD Trail Pedal
  • Front Derailleur SHIMANO ALIVIO SIDE SWING Front Derailleur (E-type Mount) 2x9-speed