Grade 5 Chromium Steel Balls
High precision balls are within 5/1,000,000″ round. These are military level specification, used for precision equipment. R-64 hardness, of the highest grade.
52100 High Carbon Chromium Alloy Races
Vacuum de-gassed process for the purest chromium alloy steel, hardened to R-62, extremely tough and very durable. Polished to a mirror finish for ABEC-5 precision and noiseless movement.
Graphite/Nylon Ball Retainers
Nylon with graphite retainers are virtually frictionless while providing constant lubrication.
The ABEC-5 Standard:
To meet the ABEC-5 standard, bearing design must pass all tests, which include noise testing at high RPM, extremely close tolerances for I.D. and O.D., roundness of ball, trueness of the races and micro surface finishes of balls and races.
Two NBR 70 rubber LLB Dual-Lip seals with low contact type seal, which rides in a matching groove machined into the bearing.
Abec 5 carbon chrome steel bearings kit for DT Swiss 240s J Lefty Front Hub.
The kit includes all bearings of the hub body and cassette body.
Why choose Abec 5 bearings in carbon chromium steel?
- long mileage.
- high impact resistance.
- best choice for use in dry environments and occasional bike washes (generally road bikes).
- higher rolling resistance compared to stainless steel bearings and ceramic bearings.
- sensible to water and moisture inside the hub / frame.
Look at the Bikeonline guide to choose the most suitable bearings for your ride.
* Demonstration photo
- TIPOLOGIA CUSCINETTO
- HUB / WHEELS MODEL
- DT Swiss - 240s J Lefty