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- From: EPLUS17@vmd.cso.uiuc.edu (Richard Engelbrecht-Wiggans)
- Subject: Re: Automatic transmissions for bikes
- References: <1992Dec27.224239.2958@sifon.cc.mcgill.ca> <1992Dec29.182213.15085@pt.com>
- Message-ID: <168CC11651.EPLUS17@vmd.cso.uiuc.edu>
- Sender: usenet@news.cso.uiuc.edu (Net Noise owner)
- Organization: C.C.S.O.
- Date: Wed, 30 Dec 1992 01:47:23 GMT
- Lines: 49
-
- In article <1992Dec29.182213.15085@pt.com>
- rkd@pt.com (Ray Downes) writes:
-
- >
- >I've ridden with a fair amount of what I'll call casual riders,
- >especially during the pre-index days, who wouldn't or couldn't figure
- >out how to use their multi-gear bike. Many riders even today, owning
- >14-24 speed bikes, don't know how to get the next higher gear ratio,
- >and tend to struggle along with same maybe 3-4 gear ratios (with at
- >least one of those being a "bad" gear). Worse yet, some manufacturers
- >chose very poor gear combinations, some even with 3-4 "good" gear ratio
- >duplicates!
- >
- >For "the masses", who have no interest in swapping gears, instead of a
- >automatic transmission, how about a intellegent shift lever, i.e. one
- >that decides what the next higher (or lower) gear-inch combo is and
- >single or double shifts as required.
- >
- >I'm picturing a single lever, perhaps using a shift drum as in some
- >motorcycle transmissions, where a single shift "up", does a single or
- >double shift as required. The drum could be matched with predetermined
- >chainring and freewheel/cassettes "sets" (manufacturers would love
- >this), dealers could alter the "set" as required to meet the
- >rider/terrain requirements. The drum would also be "programmed" to
- >disallow bad gear combinations.
- >
- >This would retain almost all of the current drivetrain design and
- >components, easing the burden on manufacturers and dealers.
- >
- >I'm all for sharing my current commute route with hundreds more bike
- >commuters - don't think it's going to happen till bikes are much more
- >casual-rider friendly. Relatively flat commute routes are one thing -
- >the gear-naive might get by. Stick a few hills in the way, or a couple
- >of windy days, and they'll find it either too time consuming and/or too
- >hard and bag it.
- >
- Yes. And while they are at it, why not enclose the whole shebang to
- protect it from the elements? Welcome to the three speed hub; for a
- while, Raleigh even sold a bike with a five speed hub. As best as I
- can guess, this sort of hub was done in by the appeal of having ten
- speeds...you know, that way the bike will be slightly more than three
- times faster than if it only had three speeds (and just think how
- fast a bike with 24 speeds should be). The Sturmey Archer three
- speed hubs worked well with minimal maintanance; I still outfit
- friends who want a reliable bike to ride a few miles each day with
- old three speeds rescued from police auctions, garage sales, and worse.
-
- ..Richard E+17
-
-