If you are going to do some downhill racing, then you may want to look at some ABEC 7 or 9 rated bearings, but for most Roller Derby activities Skate Rated bearings are what you want to look for. To put this in perspective, you would be traveling about 190 MPH if your wheels rotated at 30,000 RPM. ABEC ratings are noted as odd numbers from 1 to 9, the higher the number, the tighter the tolerances.įor instance, bearings used in machinery such as high speed routers would need to be precise when turning at 30,000 revolutions per minute (RPM) and would usually have an ABEC rating of a 7 or 9.
Meaning this is a generic overview of how well a bearing works for a wide variety of uses. ABEC, or Annular Bearing Engineers Committee rates dimensions, tolerances, geometry, and noise standards for bearings in an attempt to aid industrial bearing manufacturers and users in the production, comparison and selection of bearings for general applications. This is a tell tale sign of either a new skater, or someone who hasn't done their research. I've had some people pick up a pack of bearings, ask what ABEC rating they were, then when I told them they weren't ABEC rated but rather were "Skate Rated," they put them down and wanted to purchase only ABEC rated bearings. I haven't personally tried out any of the 6 ball bearings, such as the Bones Super Swiss 6 but the skaters who I've talked to who have tried them said they felt faster, but not everyone was able to justify the $115 price tag. Personally, I felt a difference when I went from el cheapo bearings to Qube 8-Ball bearings and I've talked to some other bigger skaters who felt the same way. The idea behind having more balls is that your weight is distributed better. The idea behind having fewer balls per bearings is that there is less surface area touching the inner and outer races making for a faster roll. Most bearings come with 7 balls each, but some have 6 and some have 8.
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