julio 22, 2026
julio 22, 2026
includes square taper bracket crank arm bolts. Was used on a new build of an old bike, not many miles on it.
julio 22, 2026
Shimano BB-UN300 Square Spindle Bottom BracketsFits JIS square-taper cranksets. Crankarm fixing bolts sold separately. Hollow spindle. For chain case. Item Specifications: Spindle Interface Type, Square Taper JIS, Bottom Bracket Shell I.D., 1.37, BB/Frame Interface, English, BB Shell Width (mm), 68 mm, Spindle Length, 117.5, SHIPS TODAY! Order before 1:30PM EST, M - F, and this item ships the same day! HAVE A QUESTION?Expert customer service by bike experts! A Real Brick And Mortar Retail Bicycle Shop with people you can talk to! Contact Us! (9-5 Mon-Fri, 12-4 Sat & Sun EST) Chat With Us
julio 22, 2026
Shimano BB-UN300 Square Spindle Bottom BracketsFits JIS square-taper cranksets. Crankarm fixing bolts sold separately. Hollow spindle. For E-Type Front Derailleur. Item Specifications: BB Shell Width (mm), 68 mm, Bottom Bracket Shell I.D., 1.37, Spindle Length, 122.5, BB/Frame Interface, English, Spindle Interface Type, Square Taper JIS, SHIPS TODAY! Order before 1:30PM EST, M - F, and this item ships the same day! HAVE A QUESTION?Expert customer service by bike experts! A Real Brick And Mortar Retail Bicycle Shop with people you can talk to! Contact Us! (9-5 Mon-Fri, 12-4 Sat & Sun EST) Chat With Us
julio 22, 2026
Option: 1, 68×113mm 2, 68×117.5mm 3, 68×123mm —————————————————————————— Note: Some batch with white coating on the left cup —————————————————————————— Model: BB-UN300 Type: Square taper Shell width: 68mm Shell thread: BC1.37" x 24T Axle length: 113mm / 117.5mm / 123mm Adapter material: Aluminum Comes with axle bolts Square taper spindle,easy installation SHIMANO quality/performance bearing square bottom bracket Better chainline stability with chain line stabilizer
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
julio 22, 2026
Shimano BB-UN300 Square Spindle Bottom BracketsFits JIS square-taper cranksets. Crankarm fixing bolts sold separately. Hollow spindle. Item Specifications: Spindle Length, 122.5, BB/Frame Interface, English, BB Shell Width (mm), 73 mm, Spindle Interface Type, Square Taper JIS, Bottom Bracket Shell I.D., 1.37, SHIPS TODAY! Order before 1:30PM EST, M - F, and this item ships the same day! HAVE A QUESTION?Expert customer service by bike experts! A Real Brick And Mortar Retail Bicycle Shop with people you can talk to! Contact Us! (9-5 Mon-Fri, 12-4 Sat & Sun EST) Chat With Us
julio 22, 2026
Shimano UN300 113mm bottom bracket. 68mm shell, 1.37x24 English threading. Installed but never ridden. Crank bolts not included.
julio 22, 2026
Shimano BB-UN300 Square Spindle Bottom BracketsFits JIS square-taper cranksets. Crankarm fixing bolts sold separately. Hollow spindle. Item Specifications: Spindle Length, 115, BB Shell Width (mm), 68 mm, BB/Frame Interface, English, Spindle Interface Type, Square Taper JIS, Bottom Bracket Shell I.D., 1.37, SHIPS TODAY! Order before 1:30PM EST, M - F, and this item ships the same day! HAVE A QUESTION?Expert customer service by bike experts! A Real Brick And Mortar Retail Bicycle Shop with people you can talk to! Contact Us! (9-5 Mon-Fri, 12-4 Sat & Sun EST) Chat With Us
julio 22, 2026
Shimano BB-UN300 Square Spindle Bottom BracketsFits JIS square-taper cranksets. Crankarm fixing bolts sold separately. Hollow spindle. 50mm chainline. Item Specifications: Spindle Length, 122.5, Bottom Bracket Shell I.D., 1.37, Spindle Interface Type, Square Taper JIS, BB/Frame Interface, English, BB Shell Width (mm), 68 mm, SHIPS TODAY! Order before 1:30PM EST, M - F, and this item ships the same day! HAVE A QUESTION?Expert customer service by bike experts! A Real Brick And Mortar Retail Bicycle Shop with people you can talk to! Contact Us! (9-5 Mon-Fri, 12-4 Sat & Sun EST) Chat With Us
julio 22, 2026
Shimano BB-UN300 Square Spindle Bottom BracketsFits JIS square-taper cranksets. Crankarm fixing bolts sold separately. Hollow spindle. For chain case. Item Specifications: BB/Frame Interface, English, Bottom Bracket Shell I.D., 1.37, Spindle Length, 127.5, Spindle Interface Type, Square Taper JIS, BB Shell Width (mm), 68 mm,.
julio 22, 2026
118mm Spindle. Square Taper JIS. Never been installed or used. Full life left here!