Shimano Bottom Brackets, Octalink V2 | Alivio BB-ES300

Shimano BB-ES300 Octalink bottom bracket - more engaging crank arm lock for MTB and Touring

The modern Octalink V2 edition of Shimano BB-ES300 Octalink bottom bracket evolved from the olden with 8-speed gears fit MTB and touring cranks installed in BSA bottom brackets with 68 or 73 mm shell width. Compared to its predecessor the BB-ES25, it can save up to 25 grams of weight. This is the standard version, which is not compatible with E-Type or chaincases.

BB-ES300

• Stiff and lightweight for efficient power transfer
• Durable spline-reinforced construction
• The 8-splined OCTALINK interface increases the strength and rigidity of the entire assembly
• 26 g lighter weight than BB-ES25
• Quick and precise assembly
• Good chain line control with chain stabilizer

Specifications:

• Application: All Mountain, Touring, City
• Type: BSA
• Shell Width: 68 mm, 73 mm
• Axle Length: 113 mm, 118 mm, 121 mm, 126 mm
• Axle Type: Octalink (MTB)
• E-Type Compatibility: no
• Chaincase Compatibility: no

Technical Information:

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

Compatibility:

• Octalink crank arms with eight-speed splines for longer grooves (Octalink MTB)
• FC-T521
• FC-T4010
• FC-T3010-8
• FC-M523
• FC-M522
• FC-M4000
• FC-M430- 8
• FC-M3000-8
• FC-R345

Features:

• hollow construction
• stiff and lightweight for efficient power transmission
• robust construction with reinforced ribs
• 26 g lighter than BB-ES25
• fast and precise installation
• good control of the chain line with chain fixation

Technology:

Octalink
In Shimano's Octalink system, the bottom bracket and crank are connected by an 8-tooth contact surface. This provides greater rigidity and greater load capacity, especially compared to conventional square systems.

Product Specifications

• MODEL NO: BB-ES300
• SERIES: SHIMANO ALIVIO T4000 Series
• Structure_Standard: ✔
• Axle length/shell width (mm)_113_73 (BC1.37): ✔
• Axle length/shell width (mm)_118_68 (BC1.37): ✔
• Axle length/shell width (mm)_118_70 (M36): ✔
• Axle length/shell width (mm)_118_73 (BC1.37): ✔
• Axle length/shell width (mm)_121_73 (BC1.37): ✔
• Axle length/shell width (mm)_126_68 (BC1.37): ✔
• Axle length/shell width (mm)_126_73 (BC1.37): ✔
• Axle length/shell width (mm)_113_68 (BC1.37): ✔
• Axle length/shell width (mm)_113_70 (M36): ✔
• Axle length/shell width (mm)_121_68 (BC1.37): ✔
• Spindle_Hollow pipe: ✔
• Spindle_OCTALINK: ✔

SKU#:

• BSA 68x113:
• Threads: BSA
• Shell Width: 68 mm
• Axle Length: 113 mm
• Part Number: EBBES300B13
• BSA 68x118:
• Threads: BSA
• Shell Width: 68 mm
• Axle Length: 118 mm
• Part Number: EBBES300B18
• BSA 68x121:
• Threads: BSA
• Shell Width: 68 mm
• Axle Length: 121 mm
• Part Number: EBBES300B21
• BSA 68x126:
• Threads: BSA
• Shell Width: 68 mm
• Axle Length: 126 mm
• Part Number: EBBES300B26
• BSA 73x113:
• Threads: BSA
• Shell Width: 73 mm
• Axle Length: 113 mm
• Part Number: EBBES300C13
• BSA 73x118:
• Threads: BSA
• Shell Width: 73 mm
• Axle Length: 118 mm
• Part Number: EBBES300C18
• BSA 73x121:
• Threads: BSA
• Shell Width: 73 mm
• Axle Length: 121 mm
• Part Number: EBBES300C21
• BSA 73x126:
• Threads: BSA
• Shell Width: 73 mm
• Axle Length: 126 mm
• Part Number: EBBES300C26

SKU#

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

Cycling Boutique is The Shimano - The official sales, support, and warranty services for Shimano in India.

When you buy a new bicycle in India or already riding a bicycle, you must have noted that Bike brands love this - Be it Trek, Specialized, Cannondale, Giant, Scott, Polygon, Merida, Marin, Bergamont, Btwin, Schwinn, Ridley - you will see all brands bicycles with an Altus component in use. At Cycling Boutique, you can also find the largest collection of Shimano Gearing Systems and Components in ready stock.

Cycling Boutique is also a fully certified and authorized sales and service center for Shimano products in India. Cycling Boutique is well versed with Shimano components with extensive service track records and top-notch bicycle mechanics in its service support center. Our employees are directly trained and certified by Shimano's cutting-edge technology and service operations.

When you wish to buy Shimano bicycle components in India, be assured that Cycling Boutique is the go-to place with 100% original, genuine Shimano components with truly trustable authenticity and trust. Our friendly technical support staff will be able to address any of your technical issues - be it a silly-looking beginner question to the toughest solvable bicycle mechanical problems.