Shimano BB-UN300 Square Taper JIS 68x122.5mm BSA Bottom Bracket 47.5mm Chainline
Shimano BB-UN300 Square Taper JIS 68x122.5mm BSA Bottom Bracket 47.5mm Chainline
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Shimano

Shimano BB-UN300 Square Taper JIS 68x122.5mm BSA Bottom Bracket 47.5mm Chainline

4.3 stars out of 3 reviews
(4.3)|
3 ratings
Shimano BB-UN300 Square Taper JIS 68x122.5mm BSA Bottom Bracket 47.5mm ChainlineShimano BB UN300 Square Taper JIS 68x122 5mm BSA Bottom Bracket 47 5mm ChainlineShimano BB UN300 Square Taper JIS 68x110mm Spindles BSA English Bottom BracketShimano BB UN300 Square Taper JIS 68x107mm Spindles BSA English Bottom BracketShimano BB UN300 Bottom Bracket English 73 x 113mm Spindle Square TaperShimano BB UN300 Square Taper JIS 68x115mm Spindles BSA English Bottom BracketShimano BB UN300 Bottom Bracket English 68 x 113mm Spindle Square TaperShimano BB UN300 Square Taper JIS 73x123mm Spindles BSA English Bottom BracketShimano BB UN300 K Bottom Bracket 68x117 5mm Spindle Square Taper Chain CaseShimano BB UN300 Square Taper JIS 68x118mm Spindles BSA English Bottom BracketShimano BB UN300 Square Taper JIS 73x118mm Spindles BSA English Bottom Bracket
Clothing Size:BB/Frame Interface: BSA (English), Spindle Interface Type: Square Taper - JIS, Spindle Length: 122.5, BB/Shell Width: 86 mm

Key item features

  • Default Title
  • Shimano
  • 192790619156
Current price is $17.59
Price when purchased online
  • Free 30-day returns
Pro Bicycle Assembly

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Columbus, 43215
Arrives between Feb 20 - Feb 24
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Shipping fee $2.00
Sold and shipped by Howler Bike Park
4.357142857142857 stars out of 5, based on 28 seller reviews(4.4)
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Shimano BB-UN300 Square Taper JIS 68x122.5mm BSA Bottom Bracket 47.5mm Chainline
Shimano BB-UN300 Square Taper JIS 68x122.5mm BSA Bottom Bracket 47.5mm Chainline
current price $17.59
Shimano BB-UN300 Square Taper JIS 68x122.5mm BSA Bottom Bracket 47.5mm Chainline
4.3 out of 5 Stars. 3 reviews
Shimano BB-UN300-E Square Taper JIS 68x122.5mm Spindles English Bottom Bracket
Shimano BB-UN300-E Square Taper JIS 68x122.5mm Spindles English Bottom Bracket
current price $23.42
Shimano BB-UN300-E Square Taper JIS 68x122.5mm Spindles English Bottom Bracket
Shimano BB-UN300-K Square Taper JIS 68x127.5mm Spindles English Bottom Bracket
Shimano BB-UN300-K Square Taper JIS 68x127.5mm Spindles English Bottom Bracket
current price $18.00
Shimano BB-UN300-K Square Taper JIS 68x127.5mm Spindles English Bottom Bracket
Shimano UN100 Bottom Bracket 122.5mm
Shimano UN100 Bottom Bracket 122.5mm
current price $19.70
Shimano UN100 Bottom Bracket 122.5mm
Sunlite SL-26 Square Taper JIS 68x111 Spindle Sealed Bearings BSA Bottom Bracket
Sunlite SL-26 Square Taper JIS 68x111 Spindle Sealed Bearings BSA Bottom Bracket
current price $30.73
Sunlite SL-26 Square Taper JIS 68x111 Spindle Sealed Bearings BSA Bottom Bracket
Shimano BBES300 Octalink V2 68x121mm Spline Spindle BSA (English) Bottom Bracket
Shimano BBES300 Octalink V2 68x121mm Spline Spindle BSA (English) Bottom Bracket
current price Now $20.80, Was $25.99
Shimano BBES300 Octalink V2 68x121mm Spline Spindle BSA (English) Bottom Bracket
Comparison Chart:
Bicycle bottom bracket typeEnglish Bottom BracketShimano BB-UN300 Square Taper JIS 68x122.5mm BSA Bottom Bracket 47.5mm ChainlineEnglish Bottom BracketShimano BB-UN300-E Square Taper JIS 68x122.5mm Spindles English Bottom BracketEnglish Bottom BracketShimano BB-UN300-K Square Taper JIS 68x127.5mm Spindles English Bottom Bracket-Shimano UN100 Bottom Bracket 122.5mmEnglish Bottom BracketSunlite SL-26 Square Taper JIS 68x111 Spindle Sealed Bearings BSA Bottom BracketEnglish Bottom BracketShimano BBES300 Octalink V2 68x121mm Spline Spindle BSA (English) Bottom Bracket
Spindle length122.5 mmShimano BB-UN300 Square Taper JIS 68x122.5mm BSA Bottom Bracket 47.5mm Chainline122.5 mmShimano BB-UN300-E Square Taper JIS 68x122.5mm Spindles English Bottom Bracket127.5 mmShimano BB-UN300-K Square Taper JIS 68x127.5mm Spindles English Bottom Bracket122.5 mmShimano UN100 Bottom Bracket 122.5mm-Sunlite SL-26 Square Taper JIS 68x111 Spindle Sealed Bearings BSA Bottom Bracket121 mmShimano BBES300 Octalink V2 68x121mm Spline Spindle BSA (English) Bottom Bracket
MaterialSteel BearingsShimano BB-UN300 Square Taper JIS 68x122.5mm BSA Bottom Bracket 47.5mm ChainlineSteel BearingsShimano BB-UN300-E Square Taper JIS 68x122.5mm Spindles English Bottom BracketSteel BearingsShimano BB-UN300-K Square Taper JIS 68x127.5mm Spindles English Bottom Bracket‎AluminiumShimano UN100 Bottom Bracket 122.5mmSteel BearingsSunlite SL-26 Square Taper JIS 68x111 Spindle Sealed Bearings BSA Bottom Bracket-Shimano BBES300 Octalink V2 68x121mm Spline Spindle BSA (English) Bottom Bracket
Spindle taperSQUARE TAPERShimano BB-UN300 Square Taper JIS 68x122.5mm BSA Bottom Bracket 47.5mm ChainlineSquare Taper JISShimano BB-UN300-E Square Taper JIS 68x122.5mm Spindles English Bottom BracketSquare Taper JISShimano BB-UN300-K Square Taper JIS 68x127.5mm Spindles English Bottom Bracket-Shimano UN100 Bottom Bracket 122.5mmJISSunlite SL-26 Square Taper JIS 68x111 Spindle Sealed Bearings BSA Bottom Bracket-Shimano BBES300 Octalink V2 68x121mm Spline Spindle BSA (English) Bottom Bracket
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4.3 out of 5 stars
stars3 ratings1 review
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Showing 1-1 of 1 review

Sep 16, 2025
johnflatfoot
Item details
Clothing size: BB/Frame Interface: BSA (English), Spindle Interface Type: Square Taper - JIS, Spindle Length: 122.5, BB/Shell Width: 86 mm
Sold and shipped by365 Cycles
4 out of 5 stars review

Verified Purchase

not like the old ones!

so had to buy this for a new crankset and my original one was 30 years old so time to replace anyway. the old one was heavy steel except the bracket on the chain side which was plastic. this fit the threads very snugly, I had to use a wire wheel to clean the threads of rust and debris for this to fit correctly. the motion is very smooth, haven't had a chance to use it for real yet. hopefully it will last, somewhat concerned about the aluminum corroding with the bike frame due to galvanic action

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