ABEC 3 radial bearing with 7 mm inner diameter, 13 mm outer diameter, 4 mm thickness and two-sided rubbing rubber sealing.
ABEC 3 bearings use grade 10 Chromium Steel Balls and 52100 High Carbon Chromium Alloy Races.
The high precision balls are within 10/1.000.000″ round, twice as round as the industry standard, at it's highest level.
The alloy races are made from a 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-3 precision and noiseless movement. The riveted Steel Retainer stands for toughness, ABEC-3 tolerances and noise tested.
| Product name: | Enduro Bearings MR137 2RS - ABEC 3 - Ball Bearing - 7x13x4mm | 
| Manufacturer: | Enduro Bearings | 
| Item code: | ENO274332 | 
| Activity: | Cycling | 
| Bearings type: | Radial Bearing, Ball Bearing | 
| Bearings inner ø: | 7 mm | 
| Bearings outer ø: | 13 mm | 
| Bearings width: | 4mm | 
| Bearings seal: | 2RS - dual rubber contact seal | 
| Bearings lubrication: | Grease Lubrication | 
| Bearings static load: | 645N | 
| Bearing material: | Stainless Steel | 
| Weight: | 10g | 
| Manufacturer item code: | MR1372RS | 
| Manufacturer page: | http://endurobearings.com/ |