BMX BIKE 19mm 8t Sealed Bottom Bracket W/Spindle Vintage Schwinn Cruiser Bicycle

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$54.23
Converts American style 68mm B.B
to Fit 3-piece 19mm spindle crank
Bearings
Sealed 41mm
Old School
New School
Clunker
Cruiser
Dirt Park
Street
Profile
Cranks
Vintage
Schwinn
8t Spline
Splined
Spindle Type
19mm
Part Type
B.B With Spindle
American Standard
Bottom Bracket
Sealed
Bearings
Color
Black
SE Racing
Profile Racing
Shell Width
68 mm
Redline
Haro
Bottom Bracket Shell Type
American
BMX
Dirt Jump
Cup Type
Press Fit 51mm
8t Splined
Cranks
Brand
AltaLine
3 Piece
Cranks
19mm 8T
19mm 8t Spindle
Axle Length
138mm
Compatible Bike Type
BMX Bike, BMX Bike - Old School, Cruiser, klunker
Prewar
Klunker
Interface
American
Chromoly
Steel
condition
New

Specifications:

  • Shell Type: American (68mm)

    • This bottom bracket set is designed for American bottom bracket shells, which are commonly found on BMX bikes, some cruisers, and older mountain bikes. The American shell typically has a 68mm width and a larger diameter compared to Euro bottom brackets.

  • Spindle Type: 19mm

    • The bottom bracket set includes a spindle with a 19mm diameter, which is a standard size for many BMX and mountain bike cranks. This size offers a good balance of strength and weight, making it suitable for various riding styles.

  • Spline: 8 Spline

    • The spindle features an 8-spline interface, which is a common design for BMX and some MTB cranksets. The splined interface ensures a secure fit between the crank arms and the spindle, reducing the risk of slippage under heavy loads.

  • Axle Length: 138mm

    • The spindle or axle length is 138mm, which is suitable for most American bottom bracket frames. This length accommodates the wider shell size and ensures proper chain alignment.

  • Cup Type: Press Fit (51mm)

    • The bottom bracket cups are press-fit with a 51mm outer diameter. This type of installation is typical for American bottom brackets, where the cups are pressed into the frame’s bottom bracket shell.

  • Interface: American

    • This bottom bracket set is specifically designed for American-style bottom brackets, making it compatible with frames that have a larger, unthreaded bottom bracket shell.

  • Bearings: Sealed (41mm)

    • The bottom bracket set includes sealed bearings with a 41mm outer diameter. Sealed bearings are protected from dirt, moisture, and debris, providing smoother operation and requiring less maintenance compared to open bearings.

  • Material: Alloy

    • The bottom bracket components, including the cups and spindle, are made from alloy. Alloy is known for its lightweight yet strong properties, contributing to the overall durability and performance of the bottom bracket set.

  • Color: Black

    • The bottom bracket set comes in a black finish, providing a sleek and modern appearance that complements most bike color schemes.

Functionality:

  • Crank Compatibility:

    • This bottom bracket set is designed to convert an American-style 68mm bottom bracket shell to fit a 3-piece crank with a 19mm spindle. It is ideal for upgrading or replacing the bottom bracket on BMX bikes, cruisers, and other bikes with an American bottom bracket shell.

  • Frame Compatibility:

    • The set is compatible with bikes that have an American bottom bracket shell, which typically measures 68mm in width. This makes it suitable for various BMX, cruiser, and older mountain bike frames.

Brand:

  • Brand: AltaLine
    • AltaLine is known for producing high-quality bicycle components, particularly in the BMX and cruiser markets. Their products are recvintagenized for durability, reliability, and performance.