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Search: Posts Made By: HTupolev
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12-03-21, 02:21 AM
Replies: 76
Views: 1,149
Posted By HTupolev

If you have any general concern toward the safety...

If you have any general concern toward the safety of other humans, it puts a responsibility on you.

Frankly a lot of people who hitch a wheel without asking have flat-out bad judgement. Mostly...
11-26-21, 11:30 AM
Replies: 109
Views: 2,914
Posted By HTupolev

Track racers would absolutely get an advantage...

Track racers would absolutely get an advantage from variable gearing. The ubiquitous use of brakeless fixies is simply down to that being what track racing is, and what's required by the rules.
11-25-21, 03:34 AM
Replies: 109
Views: 2,914
Posted By HTupolev

Except when your pedaling form is actually...

Except when your pedaling form is actually causing the chain drive to disengage during the pedal stroke, there's no difference between fixed and freewheeling. And...

...if you're routinely...
Forum: Road Cycling
11-24-21, 02:28 AM
Replies: 119
Views: 3,560
Posted By HTupolev

:foo:

:foo:
11-17-21, 09:54 PM
Replies: 461
Views: 16,586
Posted By HTupolev

:foo:

:foo:
11-06-21, 12:28 PM
Replies: 9
Views: 255
Posted By HTupolev

I'm always reminded of the weapon carried by...

I'm always reminded of the weapon carried by Niska's enforcer in Firefly.

https://i.imgur.com/X1hzKTp.png


It shouldn't be a problem if the actuation feels too heavy, Campagnolo advertised the...
11-05-21, 09:43 PM
Replies: 594
Views: 14,323
Posted By HTupolev

People have been throwing extra sprockets at...

People have been throwing extra sprockets at their crank arms for just about as long as chain drives have been practical. For example, there was a patent by Charles Dubos in 1868 for putting multiple...
11-04-21, 01:26 PM
Replies: 39
Views: 6,015
Posted By HTupolev

The kinetic energy of a descending tandem can be...

The kinetic energy of a descending tandem can be well over double what it would be for a single, creating a big issue for thermal dissipation at the brake track. Consequently, it used to be common...
11-04-21, 12:35 PM
Replies: 461
Views: 16,586
Posted By HTupolev

I don't understand how you can be committed to a...

I don't understand how you can be committed to a cassette while having no idea which of several wildly different chainring arrangements you're going use. These are choices that influence the...
11-04-21, 11:48 AM
Replies: 461
Views: 16,586
Posted By HTupolev

I dunno. Depends on the rider, what sort of...

I dunno. Depends on the rider, what sort of riding they do, and what their regional road and gravel terrain is like. Also the specific cog counts of the cassette and the rider's shifting habits,...
11-04-21, 02:43 AM
Replies: 594
Views: 14,323
Posted By HTupolev

Tight gear spacing isn't about staying within a...

Tight gear spacing isn't about staying within a narrow cadence range. It's about being able to fine-tune your torque and cadence to whatever your legs currently want. You can leverage that to...
Replies: 21
Views: 1,146
Posted By HTupolev

The Strava "analysis" screen uses elapsed time,...

The Strava "analysis" screen uses elapsed time, so you can check how long it took to reach a distance from that. It's hard to get super-precise data from a quick eyeballing, but it's precise enough...
10-27-21, 12:10 PM
Replies: 158
Views: 4,416
Posted By HTupolev

A 32-bit integer can count the number of seconds...

A 32-bit integer can count the number of seconds since 1970 out to the year 2106. The issue with 2038 is that the standard 32-bit time_t data type is implemented as a signed integer, which allows it...
10-26-21, 12:55 PM
Replies: 461
Views: 16,586
Posted By HTupolev

Why not?

Why not?
10-25-21, 11:41 PM
Replies: 461
Views: 16,586
Posted By HTupolev

Yes, but this isn't analogous. Running largely...

Yes, but this isn't analogous. Running largely doesn't employ gearing, so the idea of maintaining power output while using a slower stride at higher force simply doesn't make any sense. In running,...
10-25-21, 02:18 PM
Replies: 461
Views: 16,586
Posted By HTupolev

Based on what you wrote below, I don't think you...

Based on what you wrote below, I don't think you understood the yellow.


You wouldn't need to. A 40rpm spread at 90rpm is comparable to a 26.7rpm spread at 60rpm, namely 46.7rpm to 73.3rpm. And...
10-25-21, 01:42 PM
Replies: 461
Views: 16,586
Posted By HTupolev

In this example (presumably assuming a typical...

In this example (presumably assuming a typical 700c road setup), 60->61rpm is somewhere around .36 mph, not .6mph. Also, gearing math requires consideration to proportionality: changing by 1rpm at...
10-25-21, 01:08 PM
Replies: 461
Views: 16,586
Posted By HTupolev

On what basis is it being assumed that...

On what basis is it being assumed that livedarklions lacks cadence variability? Preferring an abnormally low cadence doesn't necessarily imply a narrow range, just that the range is in a lower region...
10-25-21, 12:56 PM
Replies: 461
Views: 16,586
Posted By HTupolev

Maybe. It's not like I'm forced to use the...

Maybe.

It's not like I'm forced to use the interleaves; they're just there when I want tight shifts, which most of the time is in circumstances where a double-shift isn't clumsy to employ.
It's...
10-24-21, 06:02 PM
Replies: 1,569
Views: 317,097
Posted By HTupolev

https://i.imgur.com/3CMS9Og.jpg ...

https://i.imgur.com/3CMS9Og.jpg

https://i.imgur.com/0H5ttM2.jpg
10-22-21, 02:03 PM
Replies: 461
Views: 16,586
Posted By HTupolev

Not very. Pushing a bicycle up the sorts of hills...

Not very. Pushing a bicycle up the sorts of hills where gearing that low would actually be used, "walking speed" is usually very slow. It's very different from moving about unencumbered on flat...
10-19-21, 01:48 AM
Replies: 84
Views: 3,494
Posted By HTupolev

"Walking speed" is very different pushing a...

"Walking speed" is very different pushing a bicycle up steep double-track than unencumbered on flat ground.


There's nothing contradictory in wanting a 19" gear while also simultaneously wanting...
10-16-21, 02:24 AM
Replies: 50
Views: 2,343
Posted By HTupolev

Entry-level models from major brands are often...

Entry-level models from major brands are often aluminum, like the Checkpoint ALR or the Topstone Alloy. I think the distribution of frame material in gravel has a lot more to do with what market...
Forum: Road Cycling
10-15-21, 01:46 PM
Replies: 62
Views: 3,819
Posted By HTupolev

That's news to me.

That's news to me.
10-14-21, 04:28 PM
Replies: 36
Views: 704
Posted By HTupolev

The 11-40 in the GRX group is designed to pair...

The 11-40 in the GRX group is designed to pair with the RD-RX812, which is a 1x-targeted rear derailleur for 11-speed road pull. It does not use a mountain bike rear derailleur.

The RD-RX810...
10-14-21, 02:54 PM
Replies: 12
Views: 473
Posted By HTupolev

Are you using long-pull brake levers? V-brakes...

Are you using long-pull brake levers? V-brakes have very high mechanical advantage, so they should be used with levers that pull a lot of cable. Alternately, you can use a Problem Solver's Travel...
10-13-21, 11:28 PM
Replies: 158
Views: 4,416
Posted By HTupolev

Gearing linkages of greater complexity than a...

Gearing linkages of greater complexity than a crankset strapped to a wheel existed before the safety bicycle.
Forum: Road Cycling
10-12-21, 06:54 PM
Replies: 14
Views: 692
Posted By HTupolev

Not just 4700. Starting in 2015, any Shimano...

Not just 4700. Starting in 2015, any Shimano 10-speed road rear derailleurs match the new 11-speed road actuation. Currently that also includes the RD-RX400.
Forum: Road Cycling
10-11-21, 10:39 PM
Replies: 14
Views: 692
Posted By HTupolev

All Shimano 9-speed derailleurs are compatible...

All Shimano 9-speed derailleurs are compatible with their pre-2015 10-speed road drivetrains, so as people have suggested, I'd throw a 9-speed MTB derailleur at the problem and call it good.

The...
10-10-21, 09:14 PM
Replies: 111
Views: 3,884
Posted By HTupolev

Yes, which is why a lot of people take tripping...

Yes, which is why a lot of people take tripping hazards seriously.


Depends on the situation.

If you're riding in clean dry conditions on an immersion hot-waxed chain, wear at 1,000 miles is...
10-10-21, 12:48 PM
Replies: 111
Views: 3,884
Posted By HTupolev

Fairly often, including around others. If...

Fairly often, including around others.

If everyone was casually neglecting their setups - not worrying about drivetrain slips because it usually doesn't cause a crash, or not worrying about bottle...
10-09-21, 12:34 AM
Replies: 159
Views: 7,226
Posted By HTupolev

No, the Shimano 600 Arabesque looks stunning! ...

No, the Shimano 600 Arabesque looks stunning!

https://i.imgur.com/rlXfkZt.jpg
10-08-21, 12:36 PM
Replies: 14
Views: 391
Posted By HTupolev

Yes, but caution needs to be taken when...

Yes, but caution needs to be taken when interpreting this in terms of tire height. Even if the tires in question inflate to a perfectly circular shape (they generally don't), the center of the larger...
10-01-21, 11:43 PM
Replies: 35
Views: 1,659
Posted By HTupolev

Rolling resistance doesn't work like that. In the...

Rolling resistance doesn't work like that. In the real world, it has two main components.

One major portion of rolling resistance in the is energy lost to deformation of the tire against the road...
10-01-21, 10:20 PM
Replies: 34
Views: 977
Posted By HTupolev

Inner tubes are basically just rubber balloons,...

Inner tubes are basically just rubber balloons, they can barely contain any pressure at all. When you add air to them, they mostly just grow bigger, rather than seeing substantial increases in...
10-01-21, 10:10 PM
Replies: 35
Views: 1,659
Posted By HTupolev

Tire designs have to make compromises between a...

Tire designs have to make compromises between a variety of performance factors: rolling resistance, grip, weight, wear life, puncture and cut protection, and so forth. For example, adding a tough...
10-01-21, 02:35 AM
Replies: 35
Views: 1,659
Posted By HTupolev

1-One advantage of folding beads is that they can...

1-One advantage of folding beads is that they can be folded. While wire-bead tires can be packed into reasonably small hoops if you know what you're doing, tires with folding beads can be safely...
09-28-21, 11:03 AM
Replies: 4
Views: 345
Posted By HTupolev

The units are inches. 1.6" is the nominal...

The units are inches. 1.6" is the nominal inflated tire width, and 28" is roughly the diameter of the inflated wheel+tire combination. I say "roughly" because the actual inflated diameter will change...
09-28-21, 02:03 AM
Replies: 4
Views: 345
Posted By HTupolev

Yes. 42-622 means that the tire has a...

Yes.

42-622 means that the tire has a nominal inflated width of 42mm, and mounts to a rim with a bead seat diameter of 622mm.
A bead seat diameter of 622mm is usually referred to as "700c" (when...
Forum: Road Cycling
09-27-21, 08:12 PM
Replies: 10
Views: 766
Posted By HTupolev

Probably not that many people. The stock...

Probably not that many people.

The stock rims on my '79 Fuji, which came with 28mm tires, had an internal width of about 17mm. That was not wide at the time: in that decade, a lot of the rims used...
09-24-21, 03:26 PM
Replies: 23
Views: 1,221
Posted By HTupolev

The risk here is of an unpredictable blowout....

The risk here is of an unpredictable blowout. What you're doing is something that I'd recommend against in general, but at any rate, using the front tire as your test run seems backwards.
Forum: Road Cycling
09-23-21, 01:28 AM
Replies: 10
Views: 766
Posted By HTupolev

The current rims on my '83 Miyata are Sun M13II...

The current rims on my '83 Miyata are Sun M13II with an internal width of 13mm, and I'm using Panaracer Pasela tires with a nominal width of 28mm on them. Actual inflated tire width for this rim/tire...
Forum: Road Cycling
09-22-21, 02:15 PM
Replies: 237
Views: 8,811
Posted By HTupolev

How often do your bike fronts break!?

How often do your bike fronts break!?
Forum: Road Cycling
09-22-21, 02:01 PM
Replies: 237
Views: 8,811
Posted By HTupolev

There is nothing magical about front brakes that...

There is nothing magical about front brakes that causes people to go over the handlebars. In terms of how the center-of-mass gets pitched around relative to the bike, whether braking is front or rear...
Forum: Road Cycling
09-21-21, 11:58 AM
Replies: 237
Views: 8,811
Posted By HTupolev

They used to sell an 11-pound bike with rim...

They used to sell an 11-pound bike with rim brakes, the Emonda SLR 10.

The Emonda ALR 5 I bought in 2015 had an inflation-adjusted price of around $1900 in 2021 USD. A current-generation Emonda...
Forum: Road Cycling
09-21-21, 01:51 AM
Replies: 46
Views: 2,355
Posted By HTupolev

I don't doubt it. I'm actually in a similar boat:...

I don't doubt it. I'm actually in a similar boat: I don't get toe overlap on either of my vintage steel road bikes, but there's a bit of it on my modern road bike. My point was simply that this...
09-20-21, 12:59 PM
Replies: 40
Views: 1,144
Posted By HTupolev

Yes, it started to squeak, which got worse and...

Yes, it started to squeak, which got worse and worse. It was a windy day, so normal healthy chain whir wasn't very audible anyway.
09-20-21, 10:07 AM
Replies: 40
Views: 1,144
Posted By HTupolev

Hard to properly compare without testing in the...

Hard to properly compare without testing in the same environment. Different places have gunk that affects exposed surfaces in different ways, like how those of us from the Pacific Northwest are...
Forum: Road Cycling
09-19-21, 10:35 PM
Replies: 46
Views: 2,355
Posted By HTupolev

Pretty much all road bike forks, vintage and...

Pretty much all road bike forks, vintage and modern, have the front wheel axle offset forward of the steering axis. It's just visually subtler on modern forks because the tubing is a lot wider and...
09-18-21, 01:31 AM
Replies: 14
Views: 496
Posted By HTupolev

Well, something is definitely amiss. You're...

Well, something is definitely amiss. You're claiming that the first bike has around a third of a percent greater gear inches than the second bike, yet somehow simultaneously has nearly seven percent...
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