Bearing Options
Bearing Options
All Extralite hubs and wheels are offered with a choice of ready installed bearings among the best available today.
All bearings feature low-friction rubber seals on both sides.
Hyper hubs, that are specifically designed for off-road use, feature an additional external O-r seal that protects the bearing seals.
Internal bearing selection
Each bearing unit is individually selected by Extralite staff, we check seal drag, rolling smoothness then select and divide them 3 different fitting classes of internal diameter, each class is 2 microns by the next one.
Despite all our bearings come directly from very high quality manufacturers our staff individually checks each unit for rolling smoothness and bore dimensional tolerance.
Extralite staff checks rolling smoothness and seal drag resistance first, then all the units passed are selected and divided in 3 different fitting classes of internal bore, each class is 2 microns by the next one. All that allows our famous truly perfect axle to bearing fitting that together with our precise bearing preload offers very high mileage with minimal rolling resitance.
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Abec5 Steel bearings
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Famous Abi-Enduro ABEC 5 precision bearings
Standard equipment for all Extralite Road hubs |
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Plus
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Minus
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High mileage Good rolling resistance High impact resistance Average best choice for dry environments |
Sensible to water & moisture inside the hub
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ABI 440C Stainless bearings
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Abi-Enduro precision fully stainless bearings 440C |
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Plus
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Minus
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High corrosion resistance Highly resistant to water/moisture (inside hub too) Medium-high impact resistance Average best choice for humid environment |
Medium mileage Medium rolling resistance
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HYC HyperCeramic
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Extralite Ceramic bearings, extremely durable & non-rustable |
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Really trick!
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Plus
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Minus
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Low rolling resistance Low weight High mileage High impact resistance Highly resistant to water/moisture (inside hub too) Best choice for maximum racing performance and durability |
Installation requires very good skills |
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XD-15 Ceramic
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World trickiest Ceramic bearings ever, extremely durable & non-rustable
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Plus
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Minus
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Low rolling resistance Highest mileage Fully openable and rebuildable Highly resistant to water, moisture and salt Best choice for maximum racing performance and durability |
Expensive Installation requires very good skills |
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Read well these basic info before ordering the parts.
Bearing replacement is not an easy operation as it may seem.
Additionally the installation of any kind of Ceramic bearings requires a very good specific expertise.
Extralite offers complete tool-sets for hub maintenance: the Pro-tool kit 1 and Bearing-sitter includes bearing inserting tools in every bearing sizes used on UltraHubs / HyperHubs / CyberHubs.
If your hub was originally equipped with standard bearings it will probably require micro-tolerance adjustments to axle and bearing fittings, this
to allow proper bearing rotation and durability (these operations are for real experts only). Alternatively send your hub to us for this servicing.
Read well Bearing Tips before attempting a bearing replacement.
This option has been offered till 2024
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HDC Heavy-Duty Ceramic
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Hi-quality Heavy-Duty Hybrid Ceramic bearing |
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Plus
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Minus
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Good mileage Low rolling resistance Medium-high impact resistance Medium resistance in humid environment Good choice for best racing performance |
Complex installation Sensible to water & moisture inside the hub |
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