Bottom Bracket threading and other specifications for bikes with
![](https://bikeraceinfo.com/images-all/tech-images/bottom-bracket/Cotter-Cranks.jpg)
![](https://cdn.mos.cms.futurecdn.net/YQfLDPMrqBKQ4AzEUdWmfe-1200-80.jpg)
Road bike bottom bracket standards explained
![](https://sp-ao.shortpixel.ai/client/to_webp,q_glossy,ret_img,w_1024,h_576/https://www.cyclemaintenanceacademy.com/wp-content/uploads/2023/02/14-measure-the-bottom-bracket-shell_3.18.1-1024x576.jpg)
Bike bottom bracket standards - Cycle Maintenance Academy
![](https://www.hambini.com/wp-content/uploads/2021/02/T47Drawing-791x1024.jpg)
T47 Bottom Bracket: Engineering Guide (Threadfit) - Hambini Engineering
![](https://i.ebayimg.com/images/g/CEEAAOSw3qJj90CN/s-l1200.jpg)
Bicycle Bottom Bracket BSA BB68/73mm Thread BB90/92 Press MTB Road Bike Ceramic
![](https://c02.purpledshub.com/uploads/sites/39/2022/02/BBSiteThumbnail2-5632896.jpg)
Simon says: Press-fit bottom brackets are better than threaded - BikeRadar
Specification:, Item Type: Bikes Bottom Bracket, Gross Weight: 122g / 4.3oz, Material: Aluminum alloy, steel, Adaptation: 5 way length: 68-73mm /
![](https://i5.walmartimages.com/asr/1f7a488d-32ad-4819-984e-2ff2709dc786.fd6d3d717522e7fff252e78423417355.jpeg?odnHeight=612&odnWidth=612&odnBg=FFFFFF)
Bikes Bottom Bracket, Accuracy Machined Thread BB91 Bike Bottom Bracket With 3 Adjustment Washers For Cycling Gold
![](https://www.parktool.com/assets/img/repairhelp/BB_Article_Round_2-T47sample.jpg)
/assets/img/repairhelp/BB_Article_
![](https://cdn.road.cc/sites/default/files/styles/main_width/public/screenshot-2019-12-06-100809.png)
Bottom brackets - get the insider info on your bike's beefiest bearing
![](https://i.stack.imgur.com/c1d5j.jpg)
cross thread - Struggling with bottom bracket installation - Bicycles Stack Exchange
![](https://www.parktool.com/assets/img/repairhelp/_800x418_crop_center-center_82_none/BB_Threaded_Shell.jpg)
/assets/img/repairhelp/_800x418_cr
![](https://www.parktool.com/assets/img/repairhelp/BB-standard-ITALY.jpg)
Bottom Bracket Standards and Terminology