Shimano Bottom Bracket, Square Taper BSA | BB-UN26

Shimano square taper bottom bracket BB-UN26, superb value for money for BSA bottom bracket

This bottom bracket will give you value for money in good senses - durable and trusted for rugged operations from India to the US, bike makers love this for the price and durability. The BB-UN26 square taper bottom bracket was launched by Shimano as the successor of the models BB-UN26 and BB-UN55. It covers a wide range of applications, from Touring and City bikes to older Road and Mountain bikes. BB-UN26 is available with BSA thread and in different axle lengths. In this type, the bottom bracket axle and crank are connected by a square taper. The delivery does not include crank bolts.

BB-UN26

SHIMANO - Cartridge Bottom Bracket - MTB - Standard Structure

For square taper cranks, the SHIMANO UN26 bottom bracket offers superior quality and reliability at a great value.

• Quick and precise assembly
• Superior quality and reliability at a great value
• Cost-competitive construction while maintaining SHIMANO quality and performance
• Square type

Specifications:

• Application: City, Touring, Road, All Mountain, Cross Country
• Type: BSA
• Shell Width: 68 mm
• Axle Length: 110 mm, 113 mm, 117.5 mm, 122.5 mm
• Axle Type: square taper (JIS)
• E-Type Compatibility: no
• Chaincase Compatibility: no

Technical Information:

• Bearings: Steel
• Axle Material: Steel
• Bottom Bracket Cup Material: aluminium (left), aluminium / steel (right)

Compatibility:

• for all cranks with JIS square mount

Recommended for:

• FC-M311, FC-M315, FC-M351, FC-M361, FC-M371, FC-M430
• FC-M2000, FC-M3000
• FC-T3010
• FC-MT100
• FC-RS200
• FC-TY301, FC-TY501, FC-TY701
• FC-TX801
• FC-A070, FC-A073

Product Specifications

• MODEL NO: BB-UN26
• SERIES: TOURNEY TX800 Series
• Remarks: * w/ Crank arm fixing bolts spec. available
• Structure_Standard: ✔
• Axle length/shell width (mm)_D-NL 122_68 (BC1.37): X*
• Axle length/shell width (mm)_LL123_68 (BC1.37): ✔
• Axle length/shell width (mm)_LL123_73 (BC1.37): ✔
• Spindle_Square type: ✔

SKU#:

*The versions with "K" in it, for eg: BB-UN26-K SHIMANO TOURNEY TY - Cartridge Bottom Bracket - MTB - denotes the BB meant to be used for Chain Case.

Cycling Boutique Guide on - Shimano Square Taper Bottom Bracket Codes: 

eg. EBBUN300B07X, EBBUN300KB23XW etc.

• B = Normal Bottom Bracket
• E = For Ebikes or similar
• K = For chain case (bicycles with a chain guard) 

• X = W/O FIXING BOLT
• B = W FIXING BOLT
• W = W/ 0.7MM SPACER

Shimano Square Taper Bottom Bracket spindles are denoted by letter codes that correspond to matching length spindles. The following are the codes and the matching spindle lengths:

Code Length

• MM 107mm and 110.5mm
• LL 113mm
• D-H 115mm
• YL 116mm
• XL 118mm
• ZL 121mm
• NL 122.5mm
• EL 127.5mm

*Note: Images are for representational purposes only. Actual size / packaging varies with product type/size.

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