Enduro Bearings COMR2437 VV (BB90) ABEC 5 ZERO Ceramic Bearing –

ZERØ ABEC 5 radial Ceramic bearing with 24 mm inner diameter, 37 mm outer diameter, 7 mm thickness and extremely low friction double-lip type sealing without contact. 

Features

ZERØ Ceramic – Proven time and again in World Cup race conditions, the ZERØ Ceramic bearings are the ultimate race day weapon. Oversized Grade 3 balls roll on races which are ground to a mirror finish after receiving Magnetite and then Cryogenic treatments for hardness and longevity. More durable and with even lower rolling resistance than any 2RS bearings, they come closer to that magic “zero” rolling resistance number.  Enduro Bearings uses Silicone seals which are more slippery than rubber seals used by other ceramic bearing suppliers. Enduro get more email and blog feedback on the ZERØ’s than any other bearing, describing the noticed difference in downhill rolling speed. And they win the independent wattage output tests when stacked against the competition. If you want to buy raw speed, ZERØ bearings are it.

VV Seals – Developed with the idea of rolling as fast as possible, this dual lip configuration does not make contact with the bottom of the machined groove. Since these bearings also have a high rate of grease fill, the grease migrates to the bottom of the groove where a hydromatic type seal is established between the 2 lips and the grease in the groove. This grease barrier keeps the dirt and contaminates from coming inside the bearing, while still rolling smoothly and with the least resistance of all Enduro bearings.

ABEC 5 – 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. ABEC 5 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.