Wheel weight

On Wednesday, March 6, 2019 at 7:21:33 PM UTC-5, Frank Krygowski wrote:
On 3/6/2019 6:04 PM, Sir Ridesalot wrote:
On Wednesday, March 6, 2019 at 11:19:45 AM UTC-5, Frank Krygowski wrote:
Snipped

Back in the mid-1980s I got my first cyclometer. For me, it was useful
motivation for training - as in "I'm only going 19 mph? I can go faster
than that!"

Nowadays the data is just depressing. I try not to look at it too much..

--
- Frank Krygowski

I guess that's why some people mount the cyclometer on their seatpost or seat-tube = so they aren't tempted to look at it whilst riding. Yet they have their accumulated mileage at the end of the ride.

Very, very vaguely related: On my folding bike, I installed a Cateye
wireless cyclometer, figuring any wire would eventually get ripped apart
during the frequent folds and unfolds.

But at temperatures less than about 45 Fahrenheit, it would lose contact
with the sending unit. It would say Zero miles per hour, even though I
was sure I was going a _little_ faster than that.

Changing batteries in the sender or display units didn't help. Shifting
the sender to different positions, ahead and behind the fork, didn't
help. I finally fabricated a separate little stub mount to keep the
display part about an inch in front of my handlebar. That seemed to cure
the problem. I guess the handlebar itself was blocking the radio signal.

My wife's identical bike has a much cheaper Echo brand wireless
cyclometer. It has no such problem.


--
- Frank Krygowski

I had a Schwinn wireless bicycle computer that had the exact opposite problem intermittently. I'd be going down a hill and the thing would tell me I was doing 200+ kph which I knew I wasn't. Even on the flats the speed readout would be intermittent. nasty if you're using it to measure distances between camping spots or between roads and trails branching off the road you're on.

Cheers

On 7/3/19 2:37 am, wrote:
On Tuesday, March 5, 2019 at 2:41:33 PM UTC-8, James wrote:
On 6/3/19 2:48 am, wrote:
On Tuesday, March 5, 2019 at 7:45:36 AM UTC-8,
wrote:


The carbon clinchers: Front; 1.13 Kg Rear with 11-29 cassette;
1.58 Kg.

That is with tires and tubes. And the speedo magnet.


If you changed to a Garmin or other GPS based speedometer, you
could save valuable grams from the front wheel because there's no
need for a magnet.

-- JS

Firstly a GPS based system is not accurate - all of those ups and
downs are not counted and on a long ride can add up to several miles.
Secondly, the wheel magnets I use weigh less than one gram.

I am always amazed that people think that "modern technology" is
better than older simply because it is newer.


Perhaps you missed the sarcastic undertone in my reply.

You know Garmin GPS systems allow for a wireless combined cadence and
wheel speed sensor?

I have one as well as a heart rate monitor strap. I took the
cadence/wheel speed sensor off some months ago, and haven't bothered to
wear the heart rate strap for years. The GPS alone seems repeatable and
accurate enough for me.

--
JS

On 7/3/19 6:58 am, Duane wrote:


I tried with my iPhone as well using RideWithGPS. In addition to
your points, I was rarely able to see the screen on sunny days.

I have that problem. I found to use the phone for navigation, I first
make sure the route is properly bike friendly, then attach earphones and
shove the phone in my back pocket and listen to the instructions as I ride.

--
JS

On 7/3/19 7:22 am, wrote:


Where do you ride your bike at 15-20 hours at a stretch?


I rode 10 hours for 250 km over two big mountains (Mt Hotham and Falls
Creek), not to mention Tawonga Gap. That would have killed my phone
battery trying to navigate through all the mobile black spots, in a
couple of hours I reckon.

--
JS

Sir Ridesalot wrote:
On Wednesday, March 6, 2019 at 7:21:33 PM UTC-5, Frank Krygowski wrote:
On 3/6/2019 6:04 PM, Sir Ridesalot wrote:
On Wednesday, March 6, 2019 at 11:19:45 AM UTC-5, Frank Krygowski wrote:
Snipped

Back in the mid-1980s I got my first cyclometer. For me, it was useful
motivation for training - as in "I'm only going 19 mph? I can go faster
than that!"

Nowadays the data is just depressing. I try not to look at it too much.

--
- Frank Krygowski

I guess that's why some people mount the cyclometer on their seatpost
or seat-tube = so they aren't tempted to look at it whilst riding. Yet
they have their accumulated mileage at the end of the ride.

Very, very vaguely related: On my folding bike, I installed a Cateye
wireless cyclometer, figuring any wire would eventually get ripped apart
during the frequent folds and unfolds.

But at temperatures less than about 45 Fahrenheit, it would lose contact
with the sending unit. It would say Zero miles per hour, even though I
was sure I was going a _little_ faster than that.

Changing batteries in the sender or display units didn't help. Shifting
the sender to different positions, ahead and behind the fork, didn't
help. I finally fabricated a separate little stub mount to keep the
display part about an inch in front of my handlebar. That seemed to cure
the problem. I guess the handlebar itself was blocking the radio signal.

My wife's identical bike has a much cheaper Echo brand wireless
cyclometer. It has no such problem.


--
- Frank Krygowski

I had a Schwinn wireless bicycle computer that had the exact opposite
problem intermittently. I'd be going down a hill and the thing would tell
me I was doing 200+ kph which I knew I wasn't. Even on the flats the
speed readout would be intermittent. nasty if you're using it to measure
distances between camping spots or between roads and trails branching off
the road you're on.

Cheers


I had my GPS drop a single solitary data point in the middle of the Pacific
Ocean during my commute one day. "Funny, it didn't feel like 7,000 km to
the office..."

On the other hand, my average speed that day rocked.

On Thu, 7 Mar 2019 13:09:30 +1100, James
wrote:

On 7/3/19 7:22 am, wrote:


Where do you ride your bike at 15-20 hours at a stretch?


I rode 10 hours for 250 km over two big mountains (Mt Hotham and Falls
Creek), not to mention Tawonga Gap. That would have killed my phone
battery trying to navigate through all the mobile black spots, in a
couple of hours I reckon.


But why? After all the road goes from here to there. Or perhaps there
is a turn off maybe 3 miles down the road. One can only speculate how
the Old Folks could go anywhere... without a GPS :-)

--
Cheers,
John B.

On 3/6/2019 9:09 PM, James wrote:
On 7/3/19 7:22 am, wrote:


Where do you ride your bike at 15-20 hours at a stretch?


I rode 10 hours for 250 km over two big mountains (Mt Hotham and Falls
Creek), not to mention Tawonga Gap.Â* That would have killed my phone
battery trying to navigate through all the mobile black spots, in a
couple of hours I reckon.

I take it you haven't tried one of those hub dynamo power circuits?


--
- Frank Krygowski

On Thu, 7 Mar 2019 13:09:30 +1100, James
wrote:

On 7/3/19 7:22 am, wrote:


Where do you ride your bike at 15-20 hours at a stretch?

I rode 10 hours for 250 km over two big mountains (Mt Hotham and Falls
Creek), not to mention Tawonga Gap. That would have killed my phone
battery trying to navigate through all the mobile black spots, in a
couple of hours I reckon.

The average bicycle dynamo can deliver 3 watts. If you ride for 10
hrs, that's 30 watt-hrs. Assuming an inefficient 5V USB battery
charger, that's 6 amp-hrs or 6,000 ma-hrs. Assuming a smartphone with
a modest 2,000 ma-hr battery inside, you could completely recharge
your battery 3 times during your 10 hr ride. If you don't want the
added load while climbing hills, then you can recharge perhaps 1.5
times during the ride. If you use an mapping app that allows you to
store maps on your smartphone, you don't need cellular connectivity
during the ride and can therefore operating in airplane mode to save
power.

--
Jeff Liebermann
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558

On 7/3/19 1:50 pm, John B. Slocomb wrote:
On Thu, 7 Mar 2019 13:09:30 +1100, James
wrote:

On 7/3/19 7:22 am, wrote:


Where do you ride your bike at 15-20 hours at a stretch?


I rode 10 hours for 250 km over two big mountains (Mt Hotham and Falls
Creek), not to mention Tawonga Gap. That would have killed my phone
battery trying to navigate through all the mobile black spots, in a
couple of hours I reckon.


But why? After all the road goes from here to there. Or perhaps there
is a turn off maybe 3 miles down the road. One can only speculate how
the Old Folks could go anywhere... without a GPS :-)


I once rode from near Gatwick airport to Brighton beach and back, all on
small roads through villages. I had a paper map with me (before smart
phones), and it was really frustrating to have to stop every few minutes
to look at the map and memorise the next few turns. So many roads. So
many little villages.

--
JS

On 7/3/19 2:11 pm, Frank Krygowski wrote:
On 3/6/2019 9:09 PM, James wrote:
On 7/3/19 7:22 am, wrote:


Where do you ride your bike at 15-20 hours at a stretch?


I rode 10 hours for 250 km over two big mountains (Mt Hotham and Falls
Creek), not to mention Tawonga Gap.Â* That would have killed my phone
battery trying to navigate through all the mobile black spots, in a
couple of hours I reckon.

I take it you haven't tried one of those hub dynamo power circuits?



For the ride I mentioned, there was no need for navigation aids. I knew
the route, though a part of it I had never been on.

I have one of those USB charging circuits that can be powered by a
dynamo. The trouble is, most phones need a bit more than 3W to keep
them charged and track your location, etc.

--
JS