BSA Bottom Brackets for Road Bikes

Looking for a BSA Bottom Bracket for your road or gravel bike? Kogel Bearings offers two versions of ceramic BSA bottom brackets. One for road bikes and one for mountain. Click the "Shop Now" button to view our entire collection of BSA Road bottom brackets

Origins of the BSA BB Standard

Originally fabricated by the Birmingham Small Arms company, BSA is the classic English threaded bottom bracket standard found on many road and mountain-bike frames.

Fancy old terminology aside, BSA bottom brackets are commonly referred to today as BSA, ISO, or English threaded bottom brackets and considered to be a standard threaded bottom bracket shell or bottom bracket.

BSA Road BB Design

BSA bottom brackets use a 1.375” (34.92mm) diameter shell and employ a 24 thread-per-inch (tpi) pitch thread.

Frame shell width is 68mm for road bikes and 73 or 68mm for mountain bikes. Riding a mountain bike with a threaded bottom bracket? Click over to our page dedicated to BSA MTB bottom brackets.

WHY Upgrade/Replace Your Bottom Bracket

Even new bikes with new high-end drivetrains can, and usually do, ship with bottom brackets using steel bearings.

Even if perfectly maintained, those steel bearings just won't roll as smoothly or efficiently as our ceramic steel bearings.

Kogel Ceramic Bearings are:

  • More symmetrical (i.e. round) and built to stricter tolerances than steel bearings
  • More efficient for power transfer than standard bearings
  • And, won't deform, flat-spot, crack or get pitted

Beyond the basics of keeping your bottom bracket clean and maintained, perhaps the most important step is ensure your bike's best performance is using a bottom bracket manufactured with high-quality ceramic bearings.

Kogel gives me more than just marginal gains!

Maxim Pirard

Shop BSA Road Bottom Brackets

Expert Advice


No amount of bearing grease can fix a cheap bottom bracket. It will never ride as efficiently as a ceramic-based bottom bracket. Over time the performance only gets worse becoming, literally, a drag on each pedal stroke.


Now imagine riding your bike with ceramic bearing components, feeling the silky smooth 100% power transfer from each pedal stroke to your rear wheel. Your crankset spins almost completely silent with hardly any effort. A feeling lasting for years, not months.


Kogel’s ceramic bottom brackets are one of the best options for maximizing the performance of your bike. Our entire line of silky-smooth bearing products offer exceptional value and guaranteed performance. Ready to experience your bike’s true potential? Use the bottom bracket finder to find the right bottom bracket for all your bikes.