BKC-0771 – XD15, Ceramic-Hybrid, Angular Contact Bearings T47 External Threaded Bottom Bracket for 68-73mm Framesets and SRAM DUB Cranksets

BKC-0771 – XD15, Ceramic-Hybrid, Angular Contact Bearings T47 External Threaded Bottom Bracket for 68-73mm Framesets and SRAM DUB Cranksets

This bottom bracket threads into 68–73mm wide T47 framesets and is compatible with SRAM DUB and DUB Wide crankset setups.

This bottom bracket uses a press-in cartridge bearing. If the bearing has been damaged due to percussive removal or installation, the following replacement bearing may be ordered:
• CXD 6806/29 LLB – XD15, Ceramic-Hybrid, ABEC-5, C3, Radial Bearing – 29mm x 42mm x 7mm

You may find the following tools useful for installation:

For bottom bracket installation:
• BBT-46x12-29 – Enduro Pro Cup socket tool for 46mm x 12-spline bottom brackets and SRAM DUB cranksets
• BBT-52x16-29 – Enduro Pro Cup socket tool for 52mm x 16-spline bottom brackets and SRAM DUB cranksets
• BBT-036 – Enduro bottom bracket flat wrench – for 41mm x 16-spline and 46mm x 12-spline
• GR-009 – Enduro MAX Bearing Grease

For bearing replacement:
• BRT-060-MH – Enduro Bearing Press rod and handle set
• BRT-040-29mm – Enduro bottom bracket bearing removal and installation toolkit for 29mm bearings
• GR-009 – Enduro MAX Bearing Grease

Enduro Bearings’ exclusive XD15 ceramic-hybrid bearings with nitrogen 440C stainless steel races have set the standard for longevity and low-friction performance in cycling for over 12 years. Unlike conventional ceramic hybrids that deliver peak performance only at installation and gradually degrade, XD15 bearings are designed to improve with use, becoming smoother over time as the ceramic balls burnish the ultra-hard races. Their corrosion-proof, cryogenically treated 440C stainless steel construction resists rust and wear far beyond traditional bearing materials, ensuring exceptional durability in all riding conditions.

Engineered as a complete high-performance system, XD15 bearings combine Grade 5 silicon nitride ceramic balls, deep-groove raceways for maximum ball size and contact area, and dual-lip labyrinth (LLB) seals packed with 90% Enduro Speed grease for long-lasting smooth operation.

The 15° angular contact design requires a light preload for optimal functionality and smooth operation under load, ensuring full ball engagement and precise load distribution. If your system does not provide a built-in preload mechanism, or includes a plastic preload adjuster, this kit includes a machined aluminum preload adjuster for reliable, consistent preload setup, as well as a full spacer kit for precise chainline adjustment. When pressed into Enduro’s precision-machined cups or Torqtite threaded systems, they deliver perfect alignment and long-term stability, eliminating creaks and maintaining smooth performance. Backed by a limited lifetime warranty against wear and corrosion, XD15 represents Enduro’s highest level of performance, consistency, and longevity.

All Enduro XD15 ceramic-hybrid bottom bracket and hub bearings are covered by a limited lifetime warranty against corrosion, wear, and manufacturing defects.
While professional servicing is not required to maintain this warranty, annual servicing is recommended using Enduro Speed Bearing Grease (GR-011).

This is just one example of the extensive range of solutions Enduro offers for the wide variety of bottom bracket standards on the market today. Enduro provides options for nearly every configuration at multiple price and performance levels, including high-carbon chromium steel, black oxide-treated, 440C stainless steel, ceramic-hybrid, and ceramic-hybrid with XD15 super stainless steel race options. Our bearings are engineered with the deepest groove raceways possible to accommodate larger balls, and feature dual-lip seals that ride in a precision micro-groove, creating a full labyrinth seal for long life and superior protection against the elements.