Publicado Por En julio 22, 2026 SHIMANO SQUARE TAPER CARTRIDGE B.B., Square Taper, 68 x 115mm The quality and performance-oriented Shimano BB-UN300 cartridge bearing bottom bracket features a JIS square taper mount and is designed for frames with BSA thread and 68 mm shell width. A stabilizer ensures a constant chain line. BB-UN300 UPC 192790619187 Manufacturer # EBBUN300B15B bb type Square Taper model BB-UN300 size 68 x 115mm spindle JIS Taper inner diameter N/A quantity 1