Shimano TOURNEY BB-UN300 English SQUARE-JIS 73x113mm Bottom Bracket pickuponly comfortable feel

comfortable feel

quieter and requires less maintenance thanks to SIL-TEC surface treatmen

Fender and rack mounts

Reflective sidewalls

Bead Socket Technology (BST) secures the bead of the tire creating an air tight seal while allowing the the tire's sidewall to expand to it's true

Shimano TOURNEY BB-UN300 English SQUARE-JIS 73x113mm Bottom Bracket pickuponly comfortable feelSHIMANO Square Type Bottom Bracket MTB Standard 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