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Search: Posts Made By: RChung
Showing results 1 to 50 of 1000
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09-05-21, 08:42 AM
Replies: 207
Views: 4,784
Posted By RChung

Ride nekkid and see how far you get. Whether...

Ride nekkid and see how far you get. Whether that's significant depends on whether you do this in front of a furry convention.
08-29-21, 12:22 AM
Replies: 8
Views: 408
Posted By RChung

Garmin Connect IQ apps that are worth it?

What apps have you found to be useful?
Forum: Road Cycling
08-27-21, 10:53 AM
Replies: 42
Views: 1,921
Posted By RChung

The #1 rule of buying a power meter is: unless...

The #1 rule of buying a power meter is: unless you have a really really good reason, avoid low serial numbers.

Rule #1B: never predicate a purchasing decision on an as-yet unreleased product. They...
Forum: Road Cycling
08-27-21, 07:29 AM
Replies: 132
Views: 8,062
Posted By RChung

What are some of your preferred ConnectIQ apps?

What are some of your preferred ConnectIQ apps?
Forum: Road Cycling
08-27-21, 03:40 AM
Replies: 8
Views: 380
Posted By RChung

The Rallys are more expensive but either will...

The Rallys are more expensive but either will probably be okay.

Here's what I tell everyone once they get their very first power meter:

Just ride normally for a couple of weeks on your usual...
08-26-21, 07:12 AM
Replies: 31
Views: 703
Posted By RChung

Yes, but it's complicated unless you're going...

Yes, but it's complicated unless you're going slowly enough not to worry about aerodynamic drag. If you're going slowly, things are much simpler: each foot of climbing is roughly equivalent to 1/Crr...
Forum: Road Cycling
08-23-21, 02:29 AM
Replies: 58
Views: 2,935
Posted By RChung

Ashton Lambie just became the first rider to go...

Ashton Lambie just became the first rider to go under 4 minutes for 4K at 3:59.93. That is, he went 4K with 0.07 seconds to spare. At his speed, that was a bit more than 1 meter, or less than the...
08-23-21, 02:14 AM
Replies: 8
Views: 446
Posted By RChung

Not an engineer, definitely not a genius, but...

Not an engineer, definitely not a genius, but it's true I've spent some time thinking about this stuff. For the OP, the more important thing is that I have a limited budget to spend on cycling so I'm...
08-22-21, 12:02 PM
Replies: 8
Views: 446
Posted By RChung

Five or six year old aero bike, plus a good new...

Five or six year old aero bike, plus a good new aero helmet, plus a good quality used power meter (not single-sided) that you'll use to tune your aero and rolling drag. That will be a better use of...
08-20-21, 09:09 AM
Replies: 8
Views: 529
Posted By RChung

This is going to depend on how detailed the...

This is going to depend on how detailed the underlying map is, not so much the app itself. If the map doesn't know about bike lanes, the app can't either.
08-17-21, 01:45 PM
Replies: 34
Views: 925
Posted By RChung

You can often find vendors at the airport who...

You can often find vendors at the airport who will wrap boxes with heavy duty plastic wrap for $10-15 per box. If I had to change flights, I might do that.
08-17-21, 06:04 AM
Replies: 34
Views: 925
Posted By RChung

Depends on whether you can fly non-stop or if you...

Depends on whether you can fly non-stop or if you have to have your luggage change planes.

I've only ever flown non-stop, on United or Air France, and always used cardboard boxes with the bike...
08-12-21, 01:15 PM
Replies: 26
Views: 867
Posted By RChung

Freely chosen cadence appears to respond to...

Freely chosen cadence appears to respond to changes in CIL. This by the way is why you generally can't take your "freely chosen" cadence on an indoor trainer at a given power level and transfer it to...
08-12-21, 01:23 AM
Replies: 26
Views: 867
Posted By RChung

I believe Jim Martin and his students at Utah...

I believe Jim Martin and his students at Utah have done some work on muscle activation during the pedal stroke. I know they've done studies on crank length, cadence, and elliptical vs. round rings,...
08-03-21, 03:50 AM
Replies: 57
Views: 2,041
Posted By RChung

I stopped reading there.

I stopped reading there.
08-01-21, 08:48 AM
Replies: 57
Views: 2,041
Posted By RChung

For a decrease in ambient temperature of 1 deg....

For a decrease in ambient temperature of 1 deg. C., rho will typically increase by ~0.4% to 0.5%; it depends on the tire but typically we'll see Crr increase by maybe 1.2% to 1.5%. So we know the...
Forum: Road Cycling
08-01-21, 02:15 AM
Replies: 16
Views: 861
Posted By RChung

Modern Flip-Flop hubs are fixed gear on one side...

Modern Flip-Flop hubs are fixed gear on one side and ratcheting on the other, but they're the same number of teeth so you don't have to change the length of the chain. To change the gear those riders...
07-31-21, 01:16 AM
Replies: 57
Views: 2,041
Posted By RChung

I must speak with different racers than you.

I must speak with different racers than you.
07-28-21, 01:09 AM
Replies: 78
Views: 1,878
Posted By RChung

The sum of an infinite series can be finite. ...

The sum of an infinite series can be finite.

But more practically, surely the "bendiness" or scale of relevance is a bicycle wheel on the surface of a road. If you believe you can measure the...
07-27-21, 04:13 PM
Replies: 78
Views: 1,878
Posted By RChung

The problem is a lot easier to think about if...

The problem is a lot easier to think about if there *is* a right height -- then the right estimation methods are the ones that include/exclude changes/differences so that you end up with the right...
07-27-21, 09:16 AM
Replies: 78
Views: 1,878
Posted By RChung

I was responding to the claim that there is no...

I was responding to the claim that there is no "right" height. I demurred: there is a right height, and one can compare various measurements or estimates of that height to the actual "right" height....
07-27-21, 08:37 AM
Replies: 78
Views: 1,878
Posted By RChung

The work it takes to raise a mass m up a height h...

The work it takes to raise a mass m up a height h under the force of gravity g is m*g*h. So that's what I do: rather than measure barometric pressure or GPS elevation gain or worry about resolution,...
07-27-21, 01:31 AM
Replies: 78
Views: 1,878
Posted By RChung

Shorter: "Robert is an annoying pedant." Hmmm....

Shorter: "Robert is an annoying pedant." Hmmm. Guilty as charged.
07-27-21, 12:59 AM
Replies: 78
Views: 1,878
Posted By RChung

The accumulated elevation gain between two points...

The accumulated elevation gain between two points must *not* be path dependent, or else you could go up the climb the "short" path and down the "long" path and gain more energy going down than you...
07-26-21, 06:26 PM
Replies: 78
Views: 1,878
Posted By RChung

That's a different problem. Are you saying that...

That's a different problem. Are you saying that if I hold my hand above a table top, there is no "right" distance between my hand and the table top? You can't measure a distance between two points...
07-26-21, 01:58 PM
Replies: 78
Views: 1,878
Posted By RChung

My apologies. I once got a student course...

My apologies. I once got a student course evaluation with: "You lied when you said we wouldn't need calculus for the class." So I didn't stop using calculus, but I did stop saying they didn't need it.
07-26-21, 01:56 PM
Replies: 78
Views: 1,878
Posted By RChung

You're mixing up a distance with the measurement...

You're mixing up a distance with the measurement of that distance (or, in this case, a height with the measurement of that height). This isn't a fractal problem. Distances and heights are actual...
07-26-21, 10:43 AM
Replies: 78
Views: 1,878
Posted By RChung

Hmmm. I think there's a "right" elevation gain...

Hmmm. I think there's a "right" elevation gain number.

Some estimates of elevation gain take grade into account.
07-26-21, 12:39 AM
Replies: 78
Views: 1,878
Posted By RChung

Unless it's hella windy, an accurate power meter,...

Unless it's hella windy, an accurate power meter, an accurate speedometer, and a pretty good bathroom scale work very well for calculating altitude gained.
07-24-21, 05:44 AM
Replies: 51
Views: 1,558
Posted By RChung

Have you measured the aerodynamic drag of any of...

Have you measured the aerodynamic drag of any of your designs? How much do they help?
Forum: Road Cycling
07-24-21, 05:37 AM
Replies: 61
Views: 2,066
Posted By RChung

There's actually a way to do it without a power...

There's actually a way to do it without a power meter but it requires pristine conditions and really really careful experimental technique, and it takes longer. But it can be done.
Forum: Road Cycling
07-23-21, 11:28 PM
Replies: 61
Views: 2,066
Posted By RChung

That varies with the individual, and you sort of...

That varies with the individual, and you sort of need a power meter to know if you're in that group or not. Some of that is because on the flat, power varies with the cube of speed, so small...
Forum: Road Cycling
07-22-21, 11:58 PM
Replies: 61
Views: 2,066
Posted By RChung

Ugh. I disagree with most of what you've written...

Ugh. I disagree with most of what you've written except for the conclusion: I agree that most riders don't need a PM, and I'm glad I have one.

Structured training was originally developed as a way...
07-21-21, 06:39 AM
Replies: 9
Views: 355
Posted By RChung

Virtual elevation was originally developed as a...

Virtual elevation was originally developed as a way to check power meter accuracy; for this purpose, consistency is insufficient, you need accuracy too. If you race in Zwift, consistency is also...
07-19-21, 04:16 PM
Replies: 281
Views: 6,774
Posted By RChung

I have a friend who rides bikes, shaves her legs,...

I have a friend who rides bikes, shaves her legs, is openly gay, and says exactly the same thing.
Forum: Road Cycling
07-18-21, 04:46 PM
Replies: 82
Views: 2,508
Posted By RChung

Not that you'll see this but I think it's...

Not that you'll see this but I think it's probably good that you do this. You're happier and it doesn't matter to me because I get to make comments without your responses, so it's pretty much a...
Forum: Road Cycling
07-17-21, 10:17 AM
Replies: 82
Views: 2,508
Posted By RChung

It's pretty clear what you're interested in. I'm...

It's pretty clear what you're interested in. I'm interested in not spreading misinformation. I wasn't really expecting that you'd engage in a good-faith manner. My comments were mostly for others, so...
Forum: Road Cycling
07-16-21, 11:21 PM
Replies: 82
Views: 2,508
Posted By RChung

You're working awfully hard for someone who's not...

You're working awfully hard for someone who's not interested. But now you're 0 for 4.
Forum: Road Cycling
07-16-21, 10:07 PM
Replies: 82
Views: 2,508
Posted By RChung

Velocomp has claimed that every generation of...

Velocomp has claimed that every generation of their sensor is as good as a strain gauge power meter. Velocomp has claimed that every generation of their sensor is better than their previous...
Forum: Road Cycling
07-16-21, 09:35 PM
Replies: 82
Views: 2,508
Posted By RChung

First, these were for the left side only...

First, these were for the left side only (https://pubmed.ncbi.nlm.nih.gov/28482367/).
...
07-16-21, 06:20 PM
Replies: 281
Views: 6,774
Posted By RChung

Probably wise. I don't even take all my advice.

Probably wise. I don't even take all my advice.
Forum: Road Cycling
07-16-21, 06:16 PM
Replies: 82
Views: 2,508
Posted By RChung

Both of these sentences are incorrect and the...

Both of these sentences are incorrect and the first sentence might have two things wrong in it.
07-14-21, 10:12 PM
Replies: 281
Views: 6,774
Posted By RChung

Word to the wise: Keep this review for Veet in...

Word to the wise: Keep this review for Veet in mind: https://www.amazon.com/gp/customer-r...R2QP56S5P2DEGA...
07-13-21, 09:51 AM
Replies: 75
Views: 2,829
Posted By RChung

Consumables? Hmmm. Power meters break, so...

Consumables? Hmmm. Power meters break, so recently I bought a spare power meter.
07-12-21, 10:06 AM
Replies: 51
Views: 1,558
Posted By RChung

I believe the top photo was of Mike Mowett in his...

I believe the top photo was of Mike Mowett in his stretchy fabric enclosure. I don't know who took the photo.
07-12-21, 10:00 AM
Replies: 51
Views: 1,558
Posted By RChung

Have you measured the aerodynamic drag of any of...

Have you measured the aerodynamic drag of any of your designs? How much do they help?
Forum: Road Cycling
07-10-21, 11:36 AM
Replies: 58
Views: 2,935
Posted By RChung

Depends on the type of race. In modern U.S. crit...

Depends on the type of race. In modern U.S. crit racing, you often don't know how much of a gap there is so you have to keep track of who's there, and who's where. In road races except at the top...
Forum: Road Cycling
07-09-21, 01:47 PM
Replies: 58
Views: 2,935
Posted By RChung

The Olympics are still on, the Tour is on right...

The Olympics are still on, the Tour is on right now, and guys are still racing against their brothers-in-law.
Forum: Road Cycling
07-09-21, 01:44 PM
Replies: 58
Views: 2,935
Posted By RChung

I haven't tested those two bikes. I try not to...

I haven't tested those two bikes. I try not to know too much about the difference between any two bits of equipment because equipment changes and there's always a new comparison to be made. What I do...
Forum: Road Cycling
07-09-21, 01:17 PM
Replies: 58
Views: 2,935
Posted By RChung

Yup. Terrible test, and it wouldn't have been...

Yup. Terrible test, and it wouldn't have been difficult to do a better one. I do it all the time.
Showing results 1 to 50 of 1000
 


 
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