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- Newsgroups: rec.skate
- Path: sparky!uunet!spool.mu.edu!agate!dog.ee.lbl.gov!hellgate.utah.edu!csn!teal.csn.org!pae
- From: pae@teal.csn.org (Phil Earnhardt)
- Subject: Re: In-line skate terminology
- Message-ID: <C01Apx.Lt9@csn.org>
- Sender: news@csn.org (news)
- Nntp-Posting-Host: teal.csn.org
- Organization: Colorado SuperNet, Inc.
- References: <1992Dec29.042346.20453@serval.net.wsu.edu>
- Distribution: na
- Date: Tue, 29 Dec 1992 18:44:20 GMT
- Lines: 52
-
- In article <1992Dec29.042346.20453@serval.net.wsu.edu> jjungbau@luke.eecs.wsu.edu (Jim Jungbauer) writes:
- >In the catalogs, I have seen bearings described with the following ratings:
- >
- > 608Z
- > 608zz
-
- Typically, the bearing cartridges used for in-line skating have some
- sort of environmental protection for the bearings and the race. There
- are shielded and sealed bearings available.
-
- The Z is the mnemonic for shielded bearings. Presumably, the ZZ means
- "double shielded." Shielded bearings resist water, dirt, and other
- contamination, but are not completely protected. That's why it's
- always a good idea to avoid water or dirt when possible. I also will
- immediately vacuum my runners and clean them after a messy skating
- session.
-
- Another flavor of bearings available are 608RS bearings. Since these
- bearings have a rubber seal, I assume that that's what RS stands for.
- These bearings do appear to be totally protected from the environment.
- They are also much, much slower than other bearings. X-C skiers like
- them because they match more closely the kinesthetics of skating
- skiing. They're also good for masochistic skaters or folks who want to
- skate through the winter.
-
- As a side note, speed roller skaters use totally unshielded bearings
- for indoor races and banked track racing. I don't know if they use
- them for road races -- a small amount of contamination could easily
- eliminate you from a race.
-
- The other factor for bearings is the lubricant. Oil will be faster but
- will require more maintenance. Grease will last much longer but will
- be slower. Racers will use Teflon and other lubricants.
-
- >I have also seen wheels described by the following:
- >
- > 82A
- >
- >What does this mean?
-
- A number followed by an "A" is a durometer, or rebound, rating. It's
- based on a 0-100 scale where 100 would give complete rebound and 0
- would give none.
-
- Typically, for rougher road surfaces, you'd like to use a lower
- durometer number. Unfortunatly, low duro wheels will usually wear out
- much faster. 74A is the softest available wheel. 78A is a pretty good
- all-around wheel. 82A gives a bit too harsh a ride for my taste. There
- are 85A wheels; they should probably be used only indoors or on very
- smooth outdoor surfaces.
-
- --phil
-