When people hear Minneapolis they think extreme cold, snow and ice.
And we do get those things but most of the time it's like Chicago -
endless, corrosive slush due to gross overuse of ice-melt chemicals.
If the Hebie case really worked, and lasted long enough to justify its
price, I'd probably get
Patrick Wrote:
"--- I'm just waiting for an IG hub with a QR.
Patrick "is he really serious?" Moore "
Your wait is over. The Rohloff is a QR IG hub.
Richard "I've got one," Gonet
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On Nov 24, 2009, at 9:22 AM, JoelMatthews wrote:
> I am hopeful I will be able to get a Hebie that fits my new IGH.
> Chicago certainly does not get the snow and cold as bad as
> Minneapolis, but the city really goes nuts with the salt.
I grew up in Elmhurst and go back every Christmas to see my
I am hopeful I will be able to get a Hebie that fits my new IGH.
Chicago certainly does not get the snow and cold as bad as
Minneapolis, but the city really goes nuts with the salt.
Crazy as it sounds, it is arguably better to bike in Alaska or
somewhere at higher elevation where lower temps keep
The reviews I have read of the Hebie are that it works very well
indeed. The downside is that it only fits a few specific gear
combinations.
On Nov 23, 2009, at 8:43 PM, jim_OLP wrote:
> That Hebie think is the most interesting gadget I've seen in a long
> time! Not cheap, but if it really,
That Hebie think is the most interesting gadget I've seen in a long
time! Not cheap, but if it really, really, really works, it could be
great. On the other hand many a "protective" cover turns out to be
merely a hard-to clean accumulator of whatever it was supposed to keep
out.
I ride during the
> Who's making these chain covers?
Jim:
There was a discussion on same over in the Peter White Bike group.
http://groups.google.com/group/bicyclelifestyle/browse_thread/thread/34d06e0d05abb4aa#
Consensus is the best were by the linked German company. The chain
rubs against the guard, yes. But
I find the most inefficient part of my setup is the guy doing the
pedaling.
With exception made to racing where such margins can be the difference
between comparable atheletes, so says Lance, I think worrying about
the IGH being 2 -5% less efficient is akin to a clydesdale like myself
insisting t
Would you find a very poorly maintained bike fun to ride, even slowly?
--one
with inefficient brakes, sluggish tires, excessively tight bearings,
badly
lubed chain, handlebar awry, saddle badly placed, left pedal broken,
derailleur mis-adjusted, and so forth? That's extreme, of course, but
the
ex
Who's making these chain covers?
On Nov 20, 5:03 am, JoelMatthews wrote:
> In snowy salty conditions having no derailer to jam up with gunk while
> riding and less to clean (in fact there are German companies making
> swell plastic chain devices that snap over IGH drivetrains) hen you
> come hom
on 11/20/09 10:57 AM, Tim McNamara at tim...@bitstream.net wrote:
>
> On Nov 20, 2009, at 9:52 AM, PATRICK MOORE wrote:
>
>> On Fri, Nov 20, 2009 at 8:38 AM, It Depends
>> wrote:
>> Berto's later work suggests much narrower gaps between derailer and
>> IGH systems. See http://www.ihpva.org/HPa
That conception was why te Tour de France was raced in fixed gears
into the 1930s. Racers felt that derailleurs were inefficient. "The
Dancing Chain" provides an excellen account of the difficulties faced
by multiple-speed systems in the early years. Tourists embraced
gearing long before ra
On Nov 20, 2009, at 9:52 AM, PATRICK MOORE wrote:
> On Fri, Nov 20, 2009 at 8:38 AM, It Depends
> wrote:
> Berto's later work suggests much narrower gaps between derailer and
> IGH systems. See http://www.ihpva.org/HParchive/PDF/hp52-2001.pdf
> (noting especially conclusion 2: "Hub gears are
on 11/19/09 7:50 PM, Tim McNamara at tim...@bitstream.net wrote:
>
> On Nov 19, 2009, at 5:16 PM, CycloFiend wrote:
>
>> on 11/19/09 5:39 AM, Mark at mclbicy...@gmail.com wrote:
>>
>>> Efficiency is a funny word to those who ride a bike for fun! I agree
>>> it may be important if you are in com
On Nov 20, 10:29 am, PATRICK MOORE wrote:
> If I, the hard rider, the time trialer, the can't-go-slow man, ever fall low
> enough to build up once again a coasting (!!!), multispeed (!!) bike, I
> will probably choose an IG hub drivetrain.
well, that's the thing. if you like to ride hard, y
Eric, I do understand your point. I also agree with Jim. The great
thing about a bicycle is that its just thatA bicycle! A mechanical
machine that has been fascinating weird humans like us for over a
century...I think tweaking with it is what makes it a great toy
for the gadget minded/kin
Report back too on the EBB; I've thought of this solution to flip-flop hubs
and disk brakes.
On Fri, Nov 20, 2009 at 9:32 AM, JoelMatthews wrote:
> > If I, the hard rider, the time trialer, the can't-go-slow man, ever fall
> low
> > enough to build up once again a coasting (!!!), multispeed (!!!
> If I, the hard rider, the time trialer, the can't-go-slow man, ever fall low
> enough to build up once again a coasting (!!!), multispeed (!!) bike, I
> will probably choose an IG hub drivetrain.
I am having a frame made, which, as the Quickbeam, can accommodate
single speed set up and an IG
Rohloff has a qr option.
On Nov 20, 9:29 am, PATRICK MOORE wrote:
> On Fri, Nov 20, 2009 at 8:17 AM, JoelMatthews wrote:
> > > The real question is not about efficiency so much as about trade-offs
> > > between two incompatible sets of desirable qualities. I was trying to
> > > make that point t
Very interesting: apparently, at least on some hubs, direct drive is *more*
efficient than any gear on a deraileur drivetrain.
On Fri, Nov 20, 2009 at 8:38 AM, It Depends wrote:
> Berto's later work suggests much narrower gaps between derailer and
> IGH systems. See http://www.ihpva.org/HParchi
Berto's later work suggests much narrower gaps between derailer and
IGH systems. See http://www.ihpva.org/HParchive/PDF/hp52-2001.pdf
(noting especially conclusion 2: "Hub gears are generally about 2%
lower in efficiency than derailleur-type gears. But there are
exceptions.").
--
You received t
On Fri, Nov 20, 2009 at 8:17 AM, JoelMatthews wrote:
> > The real question is not about efficiency so much as about trade-offs
> > between two incompatible sets of desirable qualities. I was trying to
> > make that point to the original poster. The inefficiency difference
> > between a ig hub and
> The real question is not about efficiency so much as about trade-offs
> between two incompatible sets of desirable qualities. I was trying to
> make that point to the original poster. The inefficiency difference
> between a ig hub and a derailleur drivetrain are IMO and IME too small
> for the ev
But your negative example doesn't demonstrate "inefficiency", it
demonstrates poor maintenance and poor adjustment. I don't think anyone
would dispute that such a badly maintained bike would be unpleasant.
It illustrates (demonstrate is the wrong word) extreme inefficiency, obviously.
The real q
On Thu, 2009-11-19 at 22:27 -0700, PATRICK MOORE wrote:
>
> Would you find a very poorly maintained bike fun to ride, even slowly?
> --one with inefficient brakes, sluggish tires, excessively tight
> bearings, badly lubed chain, handlebar awry, saddle badly placed, left
> pedal broken, derailleur
In snowy salty conditions having no derailer to jam up with gunk while
riding and less to clean (in fact there are German companies making
swell plastic chain devices that snap over IGH drivetrains) hen you
come home from an enjoyable ride enhances the fun.
Depending on what your riding circumstan
On Thu, Nov 19, 2009 at 8:50 PM, Tim McNamara wrote:
>
> On Nov 19, 2009, at 5:16 PM, CycloFiend wrote:
>
> > on 11/19/09 5:39 AM, Mark at mclbicy...@gmail.com wrote:
> >
> >> Efficiency is a funny word to those who ride a bike for fun! I agree
> >> it may be important if you are in competition,
On Nov 19, 2009, at 5:16 PM, CycloFiend wrote:
> on 11/19/09 5:39 AM, Mark at mclbicy...@gmail.com wrote:
>
>> Efficiency is a funny word to those who ride a bike for fun! I agree
>> it may be important if you are in competition, but when I ride and I
>> am out looking at the birds and the beauti
On Nov 19, 2009, at 11:24 AM, Steve Palincsar wrote:
> On Thu, 2009-11-19 at 07:26 -0800, Jim Thill - Hiawatha Cyclery wrote:
>> Mechanical inefficiency of the drivetrain is not the only thing that
>> makes a cyclist slower. Let's say, for example, that 90% of the total
>> inefficiency comes from
19/09, Angus wrote:
From: Angus
Subject: [RBW] Re: Internal Hub Efficiency: What the Experts Say
To: "RBW Owners Bunch"
Date: Thursday, November 19, 2009, 9:31 PM
Mr. Berto's math is quite close.
Power varies with the cube of the speed (speed x speed x speed).
5.2 cubed /
Mr. Berto's math is quite close.
Power varies with the cube of the speed (speed x speed x speed).
5.2 cubed / 5.1 cubed = 1.060 or about 6% difference in power
required.
Angus
On Nov 19, 8:17 am, Ron Farnsworth wrote:
> Bad math.
> If 96% efficient = 5.2 mph, then 90% efficient would be 4.87
--- On Thu, 11/19/09, Mark wrote:
From: Mark
Subject: [RBW] Re: Internal Hub Efficiency: What the Experts Say
To: "RBW Owners Bunch"
Date: Thursday, November 19, 2009, 5:39 AM
Efficiency is a funny word to those who ride a bike for fun! I agree
it may be important if you are in c
on 11/19/09 5:39 AM, Mark at mclbicy...@gmail.com wrote:
> Efficiency is a funny word to those who ride a bike for fun! I agree
> it may be important if you are in competition, but when I ride and I
> am out looking at the birds and the beautiful scenery, effeciency? To
> me, thats why I was attra
I'm totally into riding slower (ask my friends), but I also do some "extreme"
rides where it could make a real difference to be even a little less efficient.
If I'm not trying to stay ahead of control point closing times, let's just
noodle along!
--Eric
campyonly...@me.com
www.campyonly.com
ww
Efficiency is a funny word to those who ride a bike for fun! I agree
it may be important if you are in competition, but when I ride and I
am out looking at the birds and the beautiful scenery, effeciency? To
me, thats why I was attracted to Grant, because his whole philosophy
about bike riding has
So far, I get the feeling that the internal gears on my Sturmey Archer 8S don't
like to be put under a load. It feels fine--just like a regular bike--when I'm
spinning on the flats. Going uphill, it feels harder to pedal than it did with
a fixed gear in the same ratio. In my experience, the I
On Thu, 2009-11-19 at 09:48 -0800, Dustin Sharp wrote:
> The "feel" issue is definitely a big issue with the Rohloff in certain
> gears. You can feel static in the pedals as it grinds in gear 7, for
> example. Hear it too. Makes you understand why some riders used to call them
> pepper grinders and
Subject: Re: [RBW] Re: Internal Hub Efficiency: What the Experts Say
>
> On Thu, 2009-11-19 at 07:26 -0800, Jim Thill - Hiawatha Cyclery wrote:
>> Mechanical inefficiency of the drivetrain is not the only thing that
>> makes a cyclist slower. Let's say, for example, that 90% of the to
On Thu, 2009-11-19 at 07:26 -0800, Jim Thill - Hiawatha Cyclery wrote:
> Mechanical inefficiency of the drivetrain is not the only thing that
> makes a cyclist slower. Let's say, for example, that 90% of the total
> inefficiency comes from tire rolling resistance and aerodynamics, and
> 10% comes f
I'll bet these estimates assume a clean, oiled chain and cog set, as
well as pulleys and rings. I wonder what the calculation would be
with a couple of pounds of winter slush over the drive system! Then
add studded tires to the equation.
Michael
Westford, Vt
I can resist anything except tempta
Jim:
You're right, of course. If you look at Berto's numbers, a drop from 5.2 to
5.1mph is a 2% decrease, not 6%. Obviously, other factors are involved in how
fast you go, not just the efficiency of the drivetrain.
Applied to my PBP example, going 2% slower would add about 1.7 hours to an
84
Mechanical inefficiency of the drivetrain is not the only thing that
makes a cyclist slower. Let's say, for example, that 90% of the total
inefficiency comes from tire rolling resistance and aerodynamics, and
10% comes from the mechanical friction and slop in the drivetrain.
Then the total effect o
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