Enduro 6903 LLU MAX, ABEC 3, 17x30x7

ENDURO produces sealed bearings specifically designed for bicycles, where the loads differ from industrial applications due to non-standardized sizes, lower rotational speeds, and static forces. In fact, a high ABEC rating alone does not mean the bearing possesses all the qualities desired for optimal function and long durability on a bicycle.

The difference between a standard industrial sealed bearing and an ENDURO bicycle-specific bearing lies in deeper raceways that can better absorb lateral forces – and this applies to all ENDURO bearings, regardless of ABEC rating, material, or application!

ABEC 3

ABEC classifications are standards that a sealed bearing must meet. A higher number signals better quality. To obtain an ABEC classification, a series of requirements must be met, including noise testing at high speeds, extremely tight tolerances for inner diameter, outer diameter, ball roundness, and raceways, as well as surface treatment for all components.

ENDURO's ABEC 3 bearings surpass competitors in quality and durability, thanks to Grade 10 balls (which are twice as round as the best industrial standard) and their raceways made from 52100 High Carbon Chromium steel alloy. ENDURO ABEC 3 bearings also feature steel ball retainers to increase lifespan and are noise-tested to meet or exceed ABEC-3 tolerances.

MAX

Sealed bearings specifically designed for full-suspension frames to address the challenges associated with the loads that occur when a bearing does not "spin." MAX bearings have 35-40% greater load capacity than standard sealed bearings – this is achieved by inserting the maximum number of balls into the bearing, while the raceways are deeper to provide more lateral support. LLU seals and MaxGrease provide maximum protection against the elements.