Enduro's top of the line BB bearing kit, we couple our XD-15 Ceramic-Hybrid, ABEC-5 bearings along with all of the necessary seals and spacers to complete a precise, professional installation.

An Enduro Bearings exclusive, our XD-15 Ceramic-Hybrid bearings combine corrosion-proof, cryogenically treated nitrogen steel races with Silicon Nitride grade 5 ceramic balls in a proprietary process that results in the ultimate high performance bearing setup. The deep-groove design raceways allow for maximum sized grade 5 Silicon Nitride ceramic balls for for increased contact area and improved performance and longevity. 90% fill Kluber NBU52 grease only runs better and smoother with time and is highly resistant to being washed out. It is engineered to stick to the balls and continually be pulled back into the ball path where it is needed. The most impressive feature of XD-15 bearings is, unlike other bearings, they only get better with use. As the bearings wear-in, the balls actually make the races even smoother. So when compared to other ceramic-hybrid bearings on the market that claim speed and power advantages on day one, Enduro XD-15 bearings not only provide the same initial advantages on day one, but will get even faster and smoother with time and use. We are so confident in the performance of XD-15 Ceramic-Hybrid bearings that they carry a limited lifetime warranty against wear and corrosion.

Find out why Bike Radar reported the XD-15 "Hands down, the best bottom bracket we have ever tested". We are so sure that you will agree, that we offer an unlimited lifetime bearing and race warranty.

For the easiest removal and installation of this bearing kit, we recommend the BRT-002 30m x 42mm bearing tool. This tool allows you to quickly, remove and install bearings with a just few twists of the wrist.

The Enduro line of bearings are available in high-carbon chromium steel, 440C stainless steel, ceramic-hybrid and XD-15 with ceramic or stainless balls. Our bearings are always engineered with deepest groove races possible to accommodate the largest balls and feature dual-lip seals that ride in a micro-groove creating a full labyrinth to provide superior protection against the elements.

Precision machined Delrin Derailleur pulleys featuring XD-15 Ceramic-Hybrid, radial bearings for enhanced shifting performance and longevity. Designed and manufactured for performance, these pulleys feature CN (tight clearance) bearings in the upper pulley to maximize shifting accuracy and C4 (loose clearance) bearings in the lower pulley to allow for chain-line movement.

500 AF Delrin pulley material features a high mechanical tensile strength and rigidity, natural lubricity, high resistance to moisture, caustic chemicals and UV makes these pulleys highly durable, rigid and very smooth. Delrin also machines very cleanly and precisely. The inherent lubricative qualities of this Teflon infused material greatly reduces friction when it interfaces with the bicycle chain. When compared to other pulley materials,500 AF Delrin with Teflon, offers significantly less drag than pulleys machined from aluminum or titanium.

An Enduro Bearings exclusive, our XD-15 Ceramic-Hybrid bearings combine corrosion-proof, cryogenically treated nitrogen steel races with Silicon Nitride grade 5 ceramic balls in a proprietary process that results in the ultimate high performance bearing setup. The deep-groove design raceways allow for maximum sized grade 5 Silicon Nitride ceramic balls for increased contact area and improved performance and longevity. 90% fill Kluber NBU52 grease only runs better and smoother with time and is highly resistant to being washed out. It is engineered to stick to the balls and continually be pulled back into the ball path where it is needed.

The eleven tooth upper and lower pulleys with 5mm bolt-holes are designed as a direct upgrade for 12 speed Dura Ace Shimano derailleurs.

Enduro Derailleur Pulleys are available in a number of configurations and performance levels, starting with Ceramic-Hybrid, Black-Oxide treated Zero Ceramic as a step up, and XD-15 Ceramic-Hybrid at the top of the line. All are proudly precision manufactured in the USA.

An Enduro Bearings exclusive, our XD-15 Pro BBs feature XD-15 15degree Angular Contact cartridge bearings pressed into precision machined aluminum cups that simply thread directly into the BB shell. Utilizing the same XD-15 steel as our XD-15 Corsa bearing, Enduro XD-15 Pro bearings offer a 15degree angular contact sealed bearing in a standard sized cartridge. These bearings feature deep-groove raceways to improve longevity and to allow for maximum sized grade 5 Silicon Nitride ceramic balls. Enduro XD-15 bottom brackets are manufactured to the highest standards at the Enduro Bearings production facility in California, USA. All XD-15 bearings combine corrosion-proof, cryogenically treated nitrogen steel races with Silicon Nitride grade 5 ceramic balls in a proprietary process that results in the ultimate high performance bearing setup.

This thread-in solution allows you to fit your 30mm/386 cranks into your Italian threaded bottom bracket shell without any hassle.

An Enduro Bearings exclusive, our XD15 Pro BBs feature XD15 15 degree Angular Contact cartridge bearings pressed into precision machined aluminum T47 cups that simply thread directly into the BB shell. Utilizing the same XD15 steel as our XD15 Corsa bearing, Enduro XD15 Pro bearings offer a 15 degree angular contact sealed bearing in a standard-sized cartridge. XD15 Pro bearings feature deep-groove raceways allowing for maximum sized grade 5 Silicon Nitride ceramic balls for for increased contact area and improved performance and longevity. Enduro XD15 bottom brackets are manufactured to the highest standards at the Enduro Bearings production facility in California, USA. Enduro XD15 bearings combine corrosion-proof, cryogenically treated nitrogen steel races with Silicon Nitride grade 5 ceramic balls in a proprietary process that results in the ultimate high performance bearing setup.

An Enduro Bearings exclusive, our XD15 Pro BBs feature XD15 15-degree Angular Contact cartridge bearings pressed into precision machined aluminum T47 cups that simply thread directly into the BB shell. Utilizing the same XD15 steel as our XD15 Corsa bearing, Enduro XD15 Pro bearings offer a 15-degree angular contact sealed bearing in a standard-sized cartridge. XD15 Pro bearings feature deep-groove raceways allowing for maximum sized grade 5 Silicon Nitride ceramic balls for for increased contact area and improved performance and longevity. Enduro XD15 bottom brackets are manufactured to the highest standards at the Enduro Bearings production facility in California, USA. Enduro XD15 bearings combine corrosion-proof, cryogenically treated nitrogen steel races with Silicon Nitride grade 5 ceramic balls in a proprietary process that results in the ultimate high performance bearing setup.

Enduro Bearings' exclusive ceramic bearings with XD15 nitrogen steel races have been the ultimate longevity and low-friction story in the cycling industry for over 12 years. This extra tough, stainless material will not corrode or rust as most other ceramic hybrids on the market will. While every other ceramic bearing rolls best the day you install it and then declines, XD15 bearings actually improve over time and become smoother. XD15 bottom bracket bearings have an angular contact design to ensure smooth rolling, full ball contact, and are designed to work with the Pre-Load systems that every crank uses now. They area pressed into precision-machined cups, guaranteeing accurate alignment when installed into your T47 threaded frame.

Angular Contact stainless steel bearings pressed into precision machined aluminum T47 cups that simply thread directly into the BB shell. All Enduro bottom brackets are manufactured to the highest standards at the Enduro Bearings production facility in California, USA.

This complete bottom bracket features Angular Contact, 440C stainless steel balls and races to provide long life and superior corrosion resistance in applications and environments that may be less than ideal.

An Enduro Bearings exclusive, our XD15 Pro BBs feature XD15 15 degree Angular Contact cartridge bearings pressed into precision machined aluminum T47 cups that simply thread directly into the BB shell. Utilizing the same XD15 steel as our XD15 Corsa bearing, Enduro XD15 Pro bearings offer a 15 degree angular contact sealed bearing in a standard-sized cartridge. XD15 Pro bearings feature deep-groove raceways allowing for maximum sized grade 5 Silicon Nitride ceramic balls for for increased contact area and improved performance and longevity. Enduro XD15 bottom brackets are manufactured to the highest standards at the Enduro Bearings production facility in California, USA. Enduro XD15 bearings combine corrosion-proof, cryogenically treated nitrogen steel races with Silicon Nitride grade 5 ceramic balls in a proprietary process that results in the ultimate high performance bearing setup.