Tange Seiki Japan Bottom Bracket | BSA Square Tapered – LN7922 w/ Cr-Mo Axle, Light Alloy Body CP and Cups, Steel Bearings
Tange Seiki Bottom Bracket | BSA Square Tapered - LN7922 - Steel Axle, Steel Body CP and Cups, Steel BearingsFully CNC machined Cr-Mo Hollow axleLight alloy cups and body73mm or 68mm shell width, and every sizes axle availableTechnical InformationMaterialH
Tange Seiki Bottom Bracket | BSA Square Tapered – LN7922 – Steel Axle, Steel Body CP and Cups, Steel Bearings
- Fully CNC machined Cr-Mo Hollow axle
- Light alloy cups and body
- 73mm or 68mm shell width, and every sizes axle available
Technical Information
| Material | Height | Information | ||
| Axle | SCM415 | Cr-Mo | Any size Solid type | JIS |
| Right Hand Cup | A7075-T6 | Light Alloy | 19.0mm | 1.37″x24T L/H thread/ CP |
| Left Hand Cup | A7075-T6 | Light Alloy | 19.0mm | 1.37″x24T R/H thread/ CP |
| Body | A7075-T6 | Light Alloy | 42mm | CP |
| Bearing x2 | SUJ2 | Bearing steel | 31/17/10 | Press inserted to axle |
SKU#
| TSSTBB-LN7922-68103 – Tange Seiki Bottom Bracket | BSA Square Tapered |
| TSSTBB-LN7922-68107 – Tange Seiki Bottom Bracket | BSA Square Tapered |
| TSSTBB-LN7922-68110 – Tange Seiki Bottom Bracket | BSA Square Tapered |
| TSSTBB-LN7922-68118 – Tange Seiki Bottom Bracket | BSA Square Tapered |
*Note: Images are for representational purpose only. Actual size / packaging varies with product type/size.
About Tange Seiki Japan
Tange Seiki has a long and storied history in the bicycle industry. Yosujirou Tange founded Tange Tekkousho (Tange Iron Works) in 1920 to produce high-end front forks. In 1957, Tange Tekkousho changed its name to Tange Tekko and continued to produce high-end steel and eventually alloy front forks. In 1974 Tange Tekko began developing and producing other high-end parts and frame components.
Seiki means Precision Machining and that is exactly what Tange Seiki set out to do producing headsets and bottom brackets to precise Japanese machining standards and the highest quality possible. Over the course of the next 34 years, Tange Seiki became known as one of the most innovative headset and bottom bracket brands in the world. Tange Seiki led the way in high-quality headsets such as the Levin series, first produced in the 1980s and now have become popular once again with Fixie, Single Speed, and Retro bikes. In 1999 Tange Seiki invented the Zero Stack (semi-integrated) headsets which revolutionized the design of bicycles allowing them to be manufactured much lighter AND stronger at the same time.
Tange Seiki is a third-generation company. Sato Tange, son of Tange Seikis founder Michiaki Tange and Yosujirou Tanges grandson joined Tange Seiki in 1984 and became president in 2000. Satos eldest son, Eisuke, nicknamed Ace, has joined the company and carries on Tange Seikis commitment to Japanese excellence and standards. No matter where Tange Seiki products are manufactured, they are all made to the precise Japanese standard. This philosophy, to produce the highest quality parts to the highest standards, has been passed from one generation to another and will continue to guide Tange Seiki for generations to come.
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