HDTenEightyP/NetNews huggingface dataset:
From: border@wilbur.nas.nasa.gov (Ryan A. Border)
Subject: Re: Tandem drivetrain misbehaving
Organization: NAS, NASA Ames Research Center, Moffett Field, CA
Date: Wed, 12 Aug 92 20:51:38 GMT

In article <36748@sdcc12.ucsd.edu> wade@sdcc12.ucsd.edu (Wade Blomgren) writes:
>Bike: new Burley duet tandem 
>
>Symptom: on the first real uphill we encountered, when we started to
>really put some pressure on the pedals, the drivetrain appeared to
>"slip".  Not a jumping chain, more of a "smooth lurch".  (Same feeling
>as a rear tire slipping a few inches when riding over a wet manhole cover on 
>a climb).

>Perhaps the freewheel was not tight and was tightening up. 
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

I think you have guessed exactly what the problem is...  I wouldn't worry
about it, unless it starts happening again.  I count on a couple of slips
whenever I change the freewheel on my tandem, and they can come anywhere
in the first 50mi or so, but usually happen on short hills we try to 
just power over.

>Wade Blomgren
_______________________________________________________________________________
* Ryan A. Border               border@nas.nasa.gov,   border@craywr.cray.com  *
* Cray Research Inc., On Site Applications Analyst 415-604-4633  o__ o__      *
* Numerical Aerodynamic Simulator, NASA Ames Research Center    _.>/-.>/'_    *
* Never trust someone who can count to 1023 on their fingers.  ( ) \---\(*)...*
==============================================================================*
Newsgroups: rec.bicycles
From: rlewis@muskwa.ucs.ualberta.ca (Robert Lewis)
Subject: Re: Bicycle Paths
Organization: University Of Alberta, Edmonton Canada
Date: Thu, 13 Aug 1992 18:07:56 GMT

sridar@nil.mni.mcgill.ca (Sridar Narayanan) writes:

>Hello,

>I've finally been driven to post my opinion by Mark G. Salyzyn's 
>account of a pedestrian-caused accident.  Why are bike paths shared????
>A bike path is for bikes.  A sidewalk is for pedestrians.  Period.

Most 'bike paths' in North America are shared use facilities, by design
and (by-)law.  As such the legal status of bike paths is that they are 
essentially sidewalks which bicycles have special dispensation to ride 
on.  As such it is the obligation of cyclists to always yield to 
pedestrians (as, as you say, sidewalks are for pedestrians).  However,
even if 'bike paths' really were restricted to bicyles to you really
think that such would keep pedestrians off of them?  Pedestrians on bike
paths would be the equivilent of jay-walkers and do you really think
that the police would enforce such for the convenience of cyclists?  I
noticed that in Montreal they don't even enforce in on the roads.

>Conversely, I have to go about half a block against heavy traffic on a 
>divided avenue every day to get to work.  Because of the configuration
>of the roads in that area (near the MNI), it would add several km
>to go around.  So, I WALK my bike on the sidewalk, as per the law.

Actually you should check this out.  In many places walking a bicycle in
no way changes its status as a vehicle.

>This makes sense since it is a busy pedestrial area as well.

>Sridar


Robert M. Lewis
Department of Sociology
University of Alberta
Edmonton, Alberta
Canada
From: nat@drao.nrc.ca (Natalie Prowse)
Newsgroups: rec.bicycles
Subject: Ridiculous Quote of the Month
Date: 14 Aug 92 23:19:15 GMT
Organization: Universite Laval


"I got my kid into mountain bike racing to keep him away from drugs."

Hee. hee. hee. giggle.  *choke*. Hee Hee. *gasp*, wheeze......

-Natalie
(Shoulda been "I got my kid into mountain bike racing so he could learn about
drugs"!!! ;-)
--
She *hammers* on her Trek 2300! Now shooting for 2 megameters...
1664 klicks and counting!     (When she's not riding the Seca 650....)
------------------------------------------------------------------------------
"No, I'm not saying cycling is more fun than sex.  But I'd imagine there are
some bikes that are more fun to ride than some men I know..." (nat@drao.nrc.ca)
From: gcarter!gcarter (George Carter)
Newsgroups: rec.bicycles
Subject: Re: using presta tubes with a Schraeder wheel
Keywords: presta to schraeder
Date: Tue, 18 Aug 92 22:58:58 PDT
Distribution: world
Organization: SFBAC


>2. While Presta works fine at home with a floor pump, on the road
>   Schraeder valves are more convenient both to fill at a gas station
>   or to fill with a on-the-bike pump.

Robert Lewis writes:

>>Quite the contrary on the second point, the problem with Schraeder 
>>valves is that they are harder to use, taking an extra 30 lb/sq. inch to
>>inflate over presta valves.

I've heard this many times but have never understood why.  The 
Schraeder  valve is opened mechanically when the hose is 
attached.  No incremental air pressure for valve purposes 
 is required.  What operation is this 30 lb/sq. inch performing?

>>  As for using gas stations to fill tires,
>>perhaps some have had good luck but I find it too easy to blow tires off
>>the rim using such, I'm not sure how much air such pumps put in a tire
>>in each 'pump stroke' but it seems enough to go from 90 lbs/sq inch to
>>blow off.

Yes, care is needed here.  The pressure in the tank in any
given station may be from 50 to hundreds of pounds per square 
inch.  You never know which.  However, there is a large safety margin
here. My understanding is that recommended pressures are set by taking the
blow-off value for a new tire and dividing that value by 2.
Occassionally three or four seconds can be enough to pressurize a 
tire over 200 lb/sq inch.
From: mfrost@sword.eng.pyramid.com (Mark Frost)
Newsgroups: rec.bicycles
Subject: Beginner looking for recommendations
Date: 22 Aug 92 20:53:25 GMT
Distribution: ba
Organization: Pyramid Technology


I'm thinking about buying a bike for commuting to work and maybe some light
recreational riding on weekends.  I figure a hybrid would suit me best.
I live in the Campbell area and seem to be surrounded by several bike shops.
I went to a few this last weekend and found that most of them are the
"hi-tech" type (i.e. the most expensive, finest materials for racing or
something).  But then again, I could just be an easily confused beginner :-).

I'm looking for recommendations on bicycle shops in the Campbell area
(adjoining areas as well).  Of the places I stopped by, I liked the Off Ramp
at El Camino and San Tomas best, but I didn't really do much other than look
around.

I'd also be interested in any recommendations for hybrid bikes that people
might have.

Thanks!


          -m-----------  Mark "Hoek" Frost    (mfrost@pyramid.com)
        ---mmm---------  R&D Lab Manager Group
      -----mmmmm-------  Pyramid Technology Corporation
    -------mmmmmmm-----  3860 North First Street
  ---------mmmmmmmmm---  San Jose, California 95134 (408) 428-8163
Newsgroups: rec.bicycles
Subject: Re: Chain Suck on Mt Bike
From: news@massey.ac.nz (USENET News System)
Date: Mon, 17 Aug 92 23:14:39 GMT
Followup-To: rec.bicycles
Organization: SMIS, Massey University

d3a132@pnl.gov (Carl P Baker) wrote:

> >My problem occurs when shifting to the SMALLER chainring, as I said before.
> >And it occurs when shifting under load but not very much load. There should
> >be nothing wrong with doing this shift, but there is.
> 
> There a little plastic "anti chain suck" gidgets that you can
> get at the bike shop or mail order.  Get a mechanic to look at it and
> help you out.  The problem is that on the long drop from the middle
> chainring to the small one, the chain develops a great deal of
> inertia, and just keeps going.  The plastic thing rides in such a way
> that if the chain misses the small ring it hits the plastic thing
> (it can't fall past the plastic thing) and gets shoved back onto the
> ring by pedalling action.

It seems to me that we're not talking about chain suck at all here, but
overshifting.  Careful alignment and adjustment of the front derailleur
should prevent overshifting.  There is a fine line between the correct
adjustment (of the lower travel limit screw) and that which will result in
overshifting.

--------------------------------------------------------
Phil Etheridge               P.Etheridge@massey.ac.nz
Macintosh Consultant         Phone: +64+6-356-9099 x8689
SMIS, Massey University      Fax:   +64+6-350-5611
Palmerston North, NZ         40*23'S 175*37'E,    GMT+12
From: SSDC2@BROWNVM.BROWN.EDU (J Green)
Newsgroups: rec.bicycles
Subject: great idea for a rear tire bike rack!
Date: 17 Aug 92 17:28:00 GMT

i saw a great idea for a rear tire bike rack today at lunch!
a brilliant owner of a Nissan Pathfinder thought of this creation!

materials needed:
   2 giant U hooks with long screws attached
   a piece of wood about 1"x6"x4'
   2 huge hooks to hold bike

two U hooks go around the rear tire rack, covered in plastic so it
doesn't scratch up the tire rack. they attach to long screws, that
screw into the board. two huge hooks are screwed into the board to
hold the bike. it was really cool and looked to cost about $10 in
parts, or less if you have the pieces lying around your basement!

looked something like this:
                         _ _ _ _
                       /          \
                    /                \     <--- my (poor) picture of a tire
                  /                    \
             ---------------------------------
      ----- | o   __   ,          __   ,   o  |------ <--- Nissan Pathfinder
      ----- | o     \_/             \_/    o  |------      rear tire mount
             ---------------------------------
                  \                    /
                    \                /
                       \ _ _ _ _  /


if anyone tries this i'd be interested in hearing the results!
seems like a great alternative to spending $100+ for a good rack,
and i doubt it's worth anyone's time to bother stealing it! :-)

Janice"someday i'll have a 4Runner, but it'll be a while ...
       just spent all my money on a house!"G

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Janice Green, Research Programmer      Social Science Data Center   __o
Janice_Green@Brown.edu                 Brown University           _`\<,_
SSDC2@BROWNVM          -+||-----||+-   Providence, RI (USA)      (*)/ (*)
Newsgroups: rec.bicycles
From: rlewis@muskwa.ucs.ualberta.ca (Robert Lewis)
Subject: Re: Ammonia Smell
Organization: University Of Alberta, Edmonton Canada
Date: Fri, 21 Aug 1992 04:36:46 GMT

jrdodd@waikato.ac.nz writes:

>In article <kpalm.714356958@athena>, kpalm@athena.qualcomm.com (Kent Palm) writes:
>> I experienced that "ammonia" smell this weekend following a hard workout.
>> What is it from?

>	I can oh-so-vaguely remember seeing an article once about how certain
>chemicals that were produced during hard exercise could result in this smell,
>especially on the breath.  The word 'ceratin' springs to mind.

>	I know this doesn't help much,  but hopefully it could ring a few bells
>around the net.

>	Jonathan.

Being as this exact question came up not quite a year ago perhaps is
should be added to the FAQ.  The result of the previous discussion was
that 1) you were actually smelling ketones, in which case it probably
isn't that serious (unless you smell such seperate of a hard, fairly
long effort, in which case diabetes is a possible cause) or 2) you
actually are smelling ammonia, in which case it may be more serious
indicating a problem with protein metabolism.


Robert M. Lewis
Department of Sociology
University of Alberta
Edmonton, Alberta
Canada
From: mjs@hpfcso.FC.HP.COM (Marc Sabatella)
Newsgroups: rec.bicycles
Subject: Re: Looking for advice on purchase of TOURING bikes
Date: 18 Aug 92 19:58:26 GMT
Organization: Hewlett-Packard, Fort Collins, CO, USA

In rec.bicycles, UCPL081@UNLVM.UNL.EDU writes:

> You don't have to buy the bike at that particular shop.

You would here.  For any given brand of bicycle, there is usually only one
local dealer.  This in a town of ~80,000, with four major bike shops and a few
small ones - almost no overlap at all.  Only one place to get the Trek, or a
different place for the Cannondale.  Are other towns of similar size different
in this respect?

--------------
Marc Sabatella
marc@fc.hp.com
Newsgroups: rec.bicycles
From: rlewis@muskwa.ucs.ualberta.ca (Robert Lewis)
Subject: Re: A different twist on the taxes issue
Organization: University Of Alberta, Edmonton Canada
Date: Tue, 18 Aug 1992 22:36:36 GMT

arpepper@math.uwaterloo.ca (Adrian Pepper) writes:

>In article <1992Aug18.132038.1997@cs.rochester.edu> scott@cs.rochester.edu (Michael Scott) writes:

>>People argue that bicycles should get off the roads because they don't
>>pay the gas and registration taxes that support the roads.

>But nobody asks bicyclists to pay any registration or usage fees.  It
>hardly seems fair to withdraw a privilege on the basis that it has not
>been paid for if no effort is ever made to collect the payment.  Is
>there in fact, any way in which bicyclists can, as individuals or
>organizations, voluntarily make contributions towards road construction
>and maintenance?

You are paying already, perhaps overpaying.  For example in this city
(Edmonton, Alberta) the city pays for 25% of all new road construction
and well over 75% of road maintainance.  The city contributions come
from property taxes which are paid mostly from property taxes paid on
houses and apartments.  So, even assuming that gas taxes and
registration fees paid all other road expenses (which is not the case)
and ignoring all other expenses related to auto use (costs to medical
and welfare system due to accidents, etc.), unless one is living in a 
tent or on the street, someone only using a bicycle is paying for the 
road either through their property tax bill or as that part of their
rent which covers the cost of the same to the landlord.  Now as bicycles
take up less than 25% of the roadway than a single automobile and do
considerably less than 25% of the road damage of one automobile then we
are paying at least our fair share.

>Adrian.
>arpepper@math.uwaterloo.ca


Robert M. Lewis
Department of Sociology
University of Alberta
Edmonton, Alberta
Canada
Newsgroups: rec.bicycles
From: karen@athena.mit.edu (Karen E. Walrath)
Subject: Re: More Cateye Micro (CC-6000) Bashing--Some Observations and Solutions
Organization: Massachusetts Institute of Technology
Date: Mon, 17 Aug 1992 17:44:52 GMT

In article <Bsw5zo.GLG@math.uwaterloo.ca> arpepper@math.uwaterloo.ca (Adrian Pepper) writes:

>I think the intermittent readings on this cyclocomputer are due to poor
>contact with the middle pin; the contact for this pin is on the middle
>tongue of the mounting bracket; the slightly flexible one which
>contains the "tooth" for holding the unit on.  It seems that the middle
>pin must be the one for the wheel rotation detection circuit; the
>return and the cadence detector must be the two outer ones; whenever I
>have checked, cadence seems to continue working even when speed and
>distance fail.

I have disected a Cateye Micro that was injured in a fall.  The center
tab (looking from the back) is ground.  The left pin is the cadence
and the right is the speed.  Making contact with either the left or right
pin to the center causes the cadence or speed to register.

Karen Walrath
MIT
Newsgroups: rec.bicycles
Subject: RACE RESULTS: Tour of Holland Prologue
From: Willem Boersma <SOND0091@HASARA11.BITNET>
Date: Tuesday, 18 Aug 1992 10:57:25 CET
Organization: SARA - Stichting Academisch Rekencentrum Amsterdam

Profronde Nederland, Prologue Zoetermeer
 
1. Nijdam 5.6 km. in 6'24''  (52.500 avg.)
2. Marie                5''
3. Maassen              9''
4. Pieters             11''
5. Skibby              12''
6. Frison              15''
7. Schurer             16''
   Bezault
   Arnould
   Yates
11.Breukink            18''
   So"rensen
13.Baffi               19''
   Harmeling
   Koerts
...
22.Lemond              22''
 
No surprises in the Prologue of the Tour of Holland, with Jelle Nijdam's
nth successive win in this 6-day event's prologue.
Instead of giving you the usual ranking of _my_ fellow countrymen, I
think there would be a large audience interested in the 22nd place.
Yes, Lemond is riding this race. Let's see for how long.
----------------------------------------------------------------------------
Willem Boersma                           Bitnet:SOND0091@HASARA11
SARA                                     Internet:sond0091@vm1.sara.nl
Academic Computing Centre Amsterdam
The Netherlands
Newsgroups: rec.bicycles
From: ampe@cbnews.cb.att.com (john.e.ampe)
Subject: Re: A different twist on the taxes issue
Organization: AT&T
Date: Fri, 21 Aug 1992 17:34:52 GMT

In article <1992Aug19.121619.19222@bitrot.in-berlin.de> thomas@bitrot.in-berlin.de (Thomas Driemeyer) writes:
>A few years back, Dan Mocsny said something like "Take a car and pound
>it on the road until it has completely turned to dust. Measure the depth
>of the resulting hole. Then, do the same with a bicycle. Next, try a semi."
>Have you noticed what a truck's tires can do to asphalt, especially in
>the summer? Here, they are now using concrete at bus stops instead.

Also according to the late, great, D. Mocsny, roadway damage is
proportional to the fourth power of axle loading.  So if we compare a
200 lb bike + rider (100 lb / axle), a 4000 lb car (2000 lb / axle),
and an 80,000 lb truck (20,000 lb / axle), then we get damage factors
(compared to a bike) of 160,000 for the car, and 1,600,000,000 for the
truck.

So for every cent of road maintenance tax paid by the cyclist, the car
should pay $1,600 and the truck should pay $16 million.

John_Ampe@att.com
Newsgroups: rec.bicycles
From: rlewis@muskwa.ucs.ualberta.ca (Robert Lewis)
Subject: Re: Dual pivot calipers (?)
Organization: University Of Alberta, Edmonton Canada
Date: Sat, 22 Aug 1992 22:55:45 GMT

BRANDT_JOBST/HP1900_01@HPLOMG.HPL.HP.COM writes:

[deleted section]

>Let me state it again.  There is only so much travel in the average
>athletic human hand and unless there has been a great change in braking
>material recently (there hasn't) the ratios must be mostly the same.
>The hand levers must be the same to be interchangeable with others.
>The mechanisms are deceptive in their overlaid linkages.  The only way
>to accurately determine the ratio is to measure the ratio of cable
>movement to inter-pad spacing change.  This must be done at mid stroke
>and at the midpoint of the pad since the rotation on some cantilevers
>is substantial.

I beleive that the question of brake travel started with a comment of
mine regarding dual-pivot side-pull brakes.  In that posting I refered
to an article in Cycling Plus (August 1992, p. 13).  One of the
points in that article I refered to (but did not quote) was their claim
that Shimano's dual pivot brake levers provided different
characteristics than other levers.  To quote:

	1989, and Shimano launches a dual-pivot brake in its 105
	groupset which it calls the Super SLR system.  The brake caliper
	is very similar in design to the GB Synchron [a dual pivot
	design introduced in 1962].  But Shimano combines this design
	with a rather special brake lever to provide a two phase action.

		The first phase brings the brake blocks close to the rim
	quickly whilst the second provides increased leverage and hence
	greater greater braking power.  The increased travel of the
	brake lever due to the increased leverage of the caliper is
	taken care of by the first phase.  And, as Shimano says,
	increased braking power is available without an overall increase
	in lever travel.

Now if this is were true, and is not simply corperate hyperbole
mindlessly repeated by the cycling press, then such would seem to be an
advantage to those using cantilevers and self-energizing cantilevers.
Now I am aware that braking modulation is difficult with self-energizing
systems but on a touring tandem the extra stopping power they provide is
welcome and the type of braking one does there does not tend to be
hindered by such lack of modulation.  From my very limited experience
with SE brakes (Scotts) it seems that one of the major problems with
them is that they need to be adjusted so that the pads are very close 
to the rims if the brake levers (at least short reach brakes, in this 
case Zeus's) are not to bottom out on the bars.  Now if the Shimano 105 
SLRs did what they claim to do they would seem to offer an advantage.  
If not could someone tell me which brake levers (for drop bars) have 
the longest reach.


Robert M. Lewis
Department of Sociology
University of Alberta
Edmonton, Alberta
Canada
Newsgroups: rec.bicycles
From: stigmata@athena.mit.edu (???)
Subject: hill categories
Organization: Massachusetts Institute of Technology
Date: Fri, 14 Aug 1992 21:57:38 GMT

what system is used to rank climbs, i.e. category 1,
above category, etc.  i have never seen an actual
explanation of it.  thanks.

andy
Newsgroups: rec.bicycles
From: adr5@cunixf.cc.columbia.edu (Alex D Rodriguez)
Subject: Adjusting an Onza headset
Reply-To: adr5@cunixf.cc.columbia.edu (Alex D Rodriguez)
Organization: Columbia University
Date: Sat, 15 Aug 1992 12:54:04 GMT


Hi all,
I recently got a new headset after I neglected my D/A headset and I ended up
up with indexed steering.  I got an Onza headset which seemed like a very
nice headset, lighter and cheaper than a new D/A headset.  For those of you
no farmiliar with this headset it is a roller bearing headset which is adjusted
by hand no wrenches needed except to tighten the pinch bolt which keeps the
lock nut in place.  The problem I am having is that when I adjust the headset 
it feels properly adjusted, no binding or play even when I bounce the bike on
its front wheel, until I tighten the pinch bolt then it feels loose and the 
front end rattles when I bounce the bike on its front end.  I follwed the
instructions, I've adjusted regular ball bearing headsets before I don't
know what I am doing wrong.  Anyone out there familiar with this headset and
the proper way to adjust it?  Someone else in the club I ride with also has 
the same headset and he also is experiencing the same problem.  Also if I
tighten the adjusting nut more the steering binds.  Either posting or email
is fine, what ever you believe is appropriate.  Thanks in advance.
----------------
Alex Rodriguez
Columbia University
New York City




Newsgroups: rec.bicycles,ont.general,can.general,soc.culture.canada,ott.general