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BKC-54103 - XD-15 Ceramic-Hybrid, ABEC-5, Bottom Bracket Bearing Kit for Shimano 24mm x 37mm External Cup BBs
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 3 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 3 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 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-003 (eb9040) 24m x 37mm bearing tool. BRT-003 allows you to quickly remove and install bearings with a few twists of the wrist while the BB is still in the bike.
- Shell Fitment: BSA
- Bearings: XD-15 Ceramic
- Seal Type: LLB
- Grease Kluber NBU52 Grease
- Axle Size: 24mm
- Warranty: Unlimited Lifetime
- Enduro Reference Number: BKS-54103
| Order Value | Service | Estimated Delivery | Cost |
|---|---|---|---|
| Under £39.99 | Royal Mail Tracked | 2–3 working days from dispatch | £4.99 |
| £39.99 and over | Royal Mail Tracked | 2–3 working days from dispatch | FREE |
| Any order — Express | Royal Mail Tracked 24hr / Parcel Force 24hr | Next working day from dispatch | £6.99 |
| Bikes | Parcel Force 48hr Signed For | 2 working days from dispatch | FREE |
Delivery times shown are from dispatch, not from the point of ordering. As we source products from a range of suppliers, lead times can vary — please check the product page, your cart, or your order confirmation for the most accurate estimate for this item.
Some remote UK postcodes (Highlands, Islands) may carry a courier surcharge on larger orders — we will always contact you before applying any additional charge.
Questions? Email sales@cyclestore.co.uk with your order number.

