Tripeak 3-in-1 Core System G5 BSA-68MM Bottom Bracket (Black)

Tripeak built the 3-in-1 Core System around a simple problem: most bottom brackets lock you into one crank spindle standard, so switching a bike from a Shimano HollowTech II crank to a SRAM DUB or ROTOR 3D+ crank usually means buying a whole new bottom bracket. This BSA version uses the standard 68mm English-threaded shell that most road and gravel frames already have, with a set of swappable inner cores and end caps so the same shell can accept all three spindle standards.

What's actually equipped is a pair of Tripeak's own G5-grade ceramic bearings, running in an Alloy 6061 cup, plus the core and cap set for 24mm (Shimano HollowTech II), 28.99mm (SRAM DUB), and 30mm (ROTOR 3D+) spindles. The cup uses a 16-notch, 44mm-outer-diameter tool interface, so it installs and removes with a standard or universal bottom bracket tool - no specialist tool needed.

In practice, this is the bottom bracket to reach for on any standard BSA-threaded frame where you expect to change cranksets down the line: the shell and cups stay put, only the core changes.

Why You'll Like It

One shell, three crank standards: swap between Shimano HollowTech II, SRAM DUB, and ROTOR 3D+ cranks on the same bottom bracket by changing the core and caps, instead of buying a new unit for every crank standard.

Ceramic-grade smoothness: the G5 bearing grade is Tripeak's ceramic-ball spec, built to spin with less friction than their steel P05 equivalent.

Fits a standard BSA shell: threads straight into the 1.37" x 24 TPI English-threaded shell most road and gravel frames already use, so there's no frame compatibility question to work out first.

Installs with tools you already have: the 16-notch, 44mm-outer-diameter cup design fits a standard or universal bottom bracket tool, so no Tripeak-specific tool is required.

Who Is It For?

Riders on a standard BSA-threaded frame - still the most common bottom bracket standard on road and gravel bikes - who want a bottom bracket that won't limit which crankset they can run down the line. If your frame takes a 68mm English-threaded shell, this is the straightforward upgrade over a stock bearing.

It also suits BOTS customers building up a frame from scratch or swapping groupsets, where not knowing your next crankset in advance is normal - the core-swap system means that decision doesn't have to be made twice.

Good to Know

• Fit the core and cap set that matches your crank's spindle diameter (24mm, 28.99mm, or 30mm) before installing.
• Keep the BSA threads clean and lightly greased for a smooth, quiet install.
• A standard or universal bottom bracket tool (16-notch, 44mm) is all you need - no specialist tool required.
• Wipe the shell down after wet rides to keep the threads and bearing seals in good condition.

Technical Specifications

• Bottom Bracket Type: BSA, threaded, external bearing cups
• Bearing Type: Ceramic (Tripeak G5 grade)
• Thread Type: BSA, 1.37" x 24 TPI (English thread)
• Shell Width: 68mm (34.8mm shell diameter)
• Spindle Compatibility: 24mm (Shimano HollowTech II) / 28.99mm (SRAM DUB) / 30mm (ROTOR 3D+), via swappable cores and caps
• Bearing Set Weight: 79g (per set, without cap)
• Cup Material: Alloy 6061
• Tool Interface: 16-notch, 44mm outer diameter - fits standard/universal bottom bracket tools
• Included Caps: 2x 30mm caps, 2x 28.99mm caps + drive-side spacer, 2x 24mm caps

Additional Information

• Country of Origin: Taiwan
• Imported By: We Snap India, M. No. 5/0626 Pune Nagar Road, Wagholi, Pune - 412207
• Net Quantity: 1N