White Industries External BSA Bottom Bracket 30mm Stainless Steel Bearings Black

A smooth, serviceable, American-made bottom bracket for your 30mm spindle cranks. The bottom bracket is where every pedal stroke ends up, so it deserves better than a throwaway bearing set. Machined in California with stainless steel angular contact bearings, the White Industries External BSA Bottom Bracket is built to spin smoothly, stay quiet and be reliable for years.

Why Choose a White Industries BSA Bottom Bracket?

The White Industries External BSA Bottom Bracket is a threaded bottom bracket for standard BSA (British, 68mm or 73mm) shells, with bearings that sit outboard of the frame. This version is sized for 30mm spindle cranks, has stainless steel angular contact bearings, and is finished in black.

🌈 Looking for a different colour?

We're happy to arrange a special order from White Industries HQ.

🚴 Why Choose White Industries?

Every White Industries bottom bracket is made in their Petaluma, California workshop. The cups are machined, anodised and engraved in-house, and then fitted with Enduro bearings. This is the kind of precision — start to finish — that White Industries is known for.

The stainless steel angular contact bearings are fully serviceable, resist corrosion, and are made for the loads of pedalling. When they eventually wear out, you can replace the bearings and keep the cups, rather than having to buy a whole new bottom bracket.

This BB is also a practical fit. BSA is the most common threaded bottom bracket standard, so if your frame has a 68mm or 73mm threaded shell, it'll go straight in. The 30mm size matches White Industries MR30 series cranks, as well as other brands of 30mm spindle crank.

With anodised cups and machine-engraved logos, this is a bottom bracket which looks as good as it works. Pair it with your White Industries hubs, headset or seat collar for a matching finish.

Features

• Stainless steel angular contact bearings: Smooth, corrosion-resistant and replaceable
• 30mm spindle size: For White Industries MR30 series cranks and other 30mm spindle cranks
• Threaded BSA fit: 1.37" x 24 TPI threads, for 68mm or 73mm shells
• 83g per pair: Light, with bearings and seals included
• Anodised with machine-engraved logos: A premium finish that lasts
• Made in the USA: Machined in Petaluma, California

Pro Bike Mechanic's Tip

Fit the seals so the part numbers moulded into them face outward, sitting directly against the bearings. Grease the threads, and tighten the cups to 35-50Nm with a 12-notch/46mm tool such as the Park Tool BBT-79. Spindle spacers aren't included, so check your crank's requirements before you start.

🚀 Ready to Ride?

Give your cranks the BB they deserve. Grab a White Industries External BSA Bottom Bracket. After a different colour or spindle size? Get in touch.