Wheels Manufacturing BSA Outboard Threaded Bottom Bracket with Angular Contact Bearings for 24 mm MTB Crank Spindles

Color: Black
Size: One Size
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Featuring angular contact bearings and silicone seals, this Wheels Manufacturing BSA Outboard Threaded bottom bracket for 24 mm mountain-bike spindles is durable and provides smooth power application.


  • Compatible with ISO/English or BSA Threaded (1.37 in. x 24 tpi) bottom bracket/frame interfaces
  • Compatible with the following MTB cranksets with a 24 mm spindle diameter: Shimano HollowTech II, FSA, RaceFace EXI/X-Type/MegaExo and Rotor 3D/Agilis
  • Fits frames with 68 to 73 mm shell widths; 33.6 to 33.9 mm shell internal diameter
  • Machined aluminum cups with replaceable bearings offer increased durability and long bearing life
  • Enduro Angular Contact sealed, grade 5 chromium-steel ball bearings provide smooth, long-lasting operation and are well-suited for carrying combined axial and radial loads
  • 52100 high-carbon chromium alloy races are extremely tough and durable for a long life
  • Includes one 2.5 mm, one 1.8 mm and one 0.7 mm aluminum bottom bracket cup spacers for use with 68 mm wide shells
  • Includes two 0.5 mm and two 1 mm crank spindle spacers; includes 2 Enduro silicone dust seals

Made in USA.

View all Wheels Manufacturing Bike Bottom Brackets

Technical Specs

Best Use

Mountain Biking

Bottom Bracket Installation

Threads into Frame

Bottom Bracket Standard


Spindle Interface

No Spindle

Fits Shell Width

68-73 millimeters

Spindle Diameter

24 millimeters


101 grams

Bearing Material

Stainless Steel


Aluminum cups; Enduro Angular Contact bearings

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