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Brand: EnduroMeasurement Unit: MetricInside Diameter: 12.00mmOutside Diameter: 24.00mmWidth: 6.00mmSeals or Shields: Silicone Non-contact SealsClearance: C3
CØ 6901-VV Zero Ceramic Enduro Bike Bearing 12.00x24.00x6.00
Typical applications: Hub Bearings
ZERØ ceramic bearings have ceramic balls and steel races. The balls are Grade 3, Silicon Nitride (Si3n4). These are the roundest balls you can buy without a military license. The races are treated with a black oxide coating, which helps prevent rusting in the bearing. The races are then reground to a mirror finish after this treatment. Finally, they are cryogenically treated for strength before assembly. We also use Silicone VV seals, which is the lightest drag seal available on the market.
Si3N4 balls with 52100 High carbon Chromium Alloy Races with Cryogenic Treatment:
Cryogenic treatment takes the races down to minus three hundred degree Fahrenheit to normalize the crystalline structure of the material so the races will resist the hardness of the ceramic balls and get the maximum wear potential.
I was looking to upgrade the standard bearings on my rear campy cessete hub and found your web site , the zero bearings were selected due to price and description of manufacture , the delivery was prompt and I fitted the bearing on the outer race only, I have now done about 200 miles over some very rough surfaces and checked the wear after every ride and the bearing is still as smooth as when first fitted but the test will continue with the view to replace all my hub bearings in other wheels with these bearings.
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Great price and they're so smooth they spin forever! Thoroughly recommended.
1 of 1 people found this review helpful.
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