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- From: jbrandt@hplred.HPL.HP.COM (Jobst Brandt)
- Date: Thu, 21 Jan 1993 19:38:51 GMT
- Subject: Re: The Future of the Bike
- Message-ID: <1460063@hplred.HPL.HP.COM>
- Organization: Hewlett-Packard Laboratories, Palo Alto, CA
- Path: sparky!uunet!elroy.jpl.nasa.gov!sdd.hp.com!hpscit.sc.hp.com!hplextra!hplred!jbrandt
- Newsgroups: rec.bicycles.tech
- References: <C0x9B1.JM6@hpchase.rose.hp.com>
- Lines: 57
-
- David Casseres writes;
-
- > There are industrial chains made of various plastic materials,
- > which in theory would work on bicycles. In practice they seem to
- > have problems of durability and flexibility.
-
- With uniform pedaling as one does in a TT, chain forces would allow
- some other non-metallic transmission but during starting and hill
- climbing peak loads far exceed what any wire/elastomer can
- withstand. If you've ever had a marginally skipping chain (due to
- worn sprockets) you may recall that once you get up to speed the
- problem goes away and that it is impractical to accelerate or climb.
-
- Kurt Krueger writes:
-
- > I'd like to see an advancement on the tire. They get flats too
- > easily, and being filled with air under pressure is just an
- > accident waiting to happen. Now I have no idea what tires should
- > be replaced with; I'll leave that up to the bright engineers.
-
- I think you'll find that the most space age devices have not yet
- improved on the pneumatic tire whether that be the space shuttle of
- just plain formula one race cars. It is a mature technology. The
- bicycle, for which the pneumatic tire was invented, still has all
- the reasons that Dunlop saw today to use them. I don't see anything
- coming along to change that.
-
- > I have yet to find a comfortable saddle. I have a Vetta gel
- > saddle (racing style), and it's pretty good compared to most, but
- > after awhile, it feels like a rock.
-
- As new riders join the ranks, more effort is being made to produce
- saddles for people who are unaccustomed to sitting on the
- conventional bicycle saddle that serves the majority of experienced
- bicyclists well. Racers don't choose to ride their saddles because
- they are uncomfortable because they ride on them for long distances.
-
- > Shifting is still less than optimal. I spent a lot of money going
- > with STI, but it's still not perfect. Sometimes it hesitates.
-
- In spite of the advances, shifting a derailleur is still about the
- same as it has always been except that the sprockets are closer
- together and the chain pins are nearly flush now. Grooves on the
- sides of sprockets also assist in shifting but as long as the demand
- for both light weight and durability rule the design, I think this
- is also a mature technology.
-
- > I'd also like to see the spelling of "derailleur" revised. I've
- > never had any problems spelling it, but I'm clearly in the
- > minority, judging by the messages I read. :)
-
- Maybe it is about time that this word as many other English words
- taken directly from other languages be assimilated and not seen as
- foreign. After all if we can spell words like eight that is as
- non-phonetic as any, derailleur should come easy.
-
- jobst_brandt@hplabs.hp.com
-