home *** CD-ROM | disk | FTP | other *** search
- From: jbrandt@hplred.HPL.HP.COM (Jobst Brandt)
- Date: Fri, 22 Jan 1993 01:52:25 GMT
- Subject: Re: The Future of the Bike
- Message-ID: <1460067@hplred.HPL.HP.COM>
- Organization: Hewlett-Packard Laboratories, Palo Alto, CA
- Path: sparky!uunet!usc!sdd.hp.com!hpscit.sc.hp.com!hplextra!hplred!jbrandt
- Newsgroups: rec.bicycles.tech
- References: <C0x9B1.JM6@hpchase.rose.hp.com>
- Lines: 20
-
- Dave Rogers writes:
-
- > Some Harley-Davidson motorcycles have had a cogged Kevlar drive
- > belt. Supposedly with much better reliability than chains and no
- > chain lube required.
-
- A Harley Davidson does not have nearly the torque of a bicycle rider
- and to make up for that the sprocket is more than a foot in
- diameter. A bicycle has a sprocket slightly larger than an inch in
- diameter and room for less than 6mm wide chain. On top of that,
- there is a little more than an inch of width for all the gears.
- This is less than the width of the single toothed belt "sprocket" of
- the motorcycle. I think you will also note that such a drive is
- not used in racing competition. This arises from weight,
- reliability, and gearing considerations.
-
- I don't see the belt coming to bicycling, at least not for high
- performance bicycles.
-
- jobst_brandt@hplabs.hp.com
-