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Search: Posts Made By: Duragrouch
Showing results 1 to 50 of 1000
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Forum: General Cycling Discussion
05-20-24, 07:47 AM
Replies: 26
Views: 449
Posted By Duragrouch

Noddenough. 20x1.75 with 50:11 only gets me 85...

Noddenough. 20x1.75 with 50:11 only gets me 85 gear inches, which is bare minimum high end for me, just enough to pedal down mild grades, but it's enough. 34:30 gets me 21 inches, enough for now,...
Forum: General Cycling Discussion
05-20-24, 07:28 AM
Replies: 46
Views: 1,555
Posted By Duragrouch

That Halfway did look cool. But try to mount...

That Halfway did look cool. But try to mount front and rear racks on single-sided forks. A better view than you may have seen:...
Forum: General Cycling Discussion
05-20-24, 06:38 AM
Replies: 26
Views: 449
Posted By Duragrouch

Welp, I guess what I'm trying to say is, the...

Welp, I guess what I'm trying to say is, the newer setup you mention is better than the old. But if you haven't already bought parts, you should evaluate if that will get you everything you want,...
Forum: General Cycling Discussion
05-20-24, 02:29 AM
Replies: 26
Views: 449
Posted By Duragrouch

Like I said, the going down a tooth on the high...

Like I said, the going down a tooth on the high cog will make more of a difference in (higher) speed than dropping down a couple teeth on the high chainring. That said, do you need a higher high?...
Forum: Touring
05-20-24, 01:15 AM
Replies: 68
Views: 1,766
Posted By Duragrouch

Yeah my local hardware (famous place) used to...

Yeah my local hardware (famous place) used to carry gallons of coleman fuel, and then not when the price went way up. Never once saw cartridges there, but then they were 2 miles from REI's flagship...
Forum: Framebuilders
05-20-24, 12:55 AM
Replies: 50
Views: 2,043
Posted By Duragrouch

Used to be, lots of bikes (nearly all) were...

Used to be, lots of bikes (nearly all) were designed by non-engineers, who had no access to advanced design tools. Even the big makers didn't have the horsepower to solid model a frame and do FEA in...
Forum: General Cycling Discussion
05-20-24, 12:29 AM
Replies: 26
Views: 449
Posted By Duragrouch

The new wider cassette, gains you more gear...

The new wider cassette, gains you more gear range, than the slightly more narrow triple, loses range. And with 16T max drop on most front derailleurs now, you can go wider still, or go 11-36T and get...
Forum: Framebuilders
05-20-24, 12:08 AM
Replies: 50
Views: 2,043
Posted By Duragrouch

Fair enough. Perhaps I got too far into the...

Fair enough. Perhaps I got too far into the weeds. Apologies. I was only trying to explain what *does* change elastic stiffness, and no, welding process isn't one of those things, as others pointed...
Forum: Bicycle Mechanics
05-19-24, 11:41 PM
Replies: 17
Views: 262
Posted By Duragrouch

Completely understandable. Going forward, I...

Completely understandable.

Going forward, I cannot overemphasize the helpfulness of checklists, for travel especially. And once done for a given type of trip (or standard template), the big work...
Forum: Bicycle Mechanics
05-19-24, 08:02 PM
Replies: 17
Views: 262
Posted By Duragrouch

Sorry to hear that. The success of fit should be...

Sorry to hear that. The success of fit should be pretty straighforward; No binding, no more slack lateral* or in tension than other links, doesn't protrude above the other links when wrapped on a cog...
Forum: Indoor & Stationary Cycling Forum
05-19-24, 06:45 PM
Replies: 14
Views: 317
Posted By Duragrouch

There was a really good Radiolab some years ago...

There was a really good Radiolab some years ago about detecting the difference between true random data and contrived.
Forum: General Cycling Discussion
05-19-24, 06:43 PM
Replies: 37
Views: 960
Posted By Duragrouch

Sanford. I did not know that!

Sanford.



I did not know that!
Forum: General Cycling Discussion
05-19-24, 06:15 PM
Replies: 37
Views: 960
Posted By Duragrouch

Fun trivia: What was Redd Foxx's birth (real)...

Fun trivia: What was Redd Foxx's birth (real) name?
Forum: Framebuilders
05-19-24, 05:51 PM
Replies: 50
Views: 2,043
Posted By Duragrouch

Well, perhaps simpler in that loading on a bike...

Well, perhaps simpler in that loading on a bike frame is always well below the elastic limit, for long fatigue life. Springs are much simpler in shape, and useful for explaining very basic mechanics...
Forum: Framebuilders
05-19-24, 04:46 AM
Replies: 50
Views: 2,043
Posted By Duragrouch

Pure chrome is brittle. That doesn't mean steel...

Pure chrome is brittle. That doesn't mean steel with chrome content is brittle.

Chrome has a very strong affinity to bonding with carbon to form chromium carbides, which, unfortunately, often grow...
Forum: Framebuilders
05-19-24, 04:02 AM
Replies: 50
Views: 2,043
Posted By Duragrouch

Just a few thoughts, basic, do not address all...

Just a few thoughts, basic, do not address all things above.

A coil spring, in compression or tension (force direction in line with the coil axis), puts the spring wire in both bending and torsion...
Forum: General Cycling Discussion
05-19-24, 02:18 AM
Replies: 37
Views: 960
Posted By Duragrouch

LOL! I hadn't heard of them until seeing the...

LOL!

I hadn't heard of them until seeing the Mercier Nano on there, looked like sensational deal, then looked deeper for reviews, not terrible, but not quite up to typical bike standards these...
Forum: Bicycle Mechanics
05-19-24, 12:26 AM
Replies: 43
Views: 1,071
Posted By Duragrouch

Oh, yes. One set of tires I looked at, seemed...

Oh, yes. One set of tires I looked at, seemed fine, but then I pinched them, and could see the age of the rubber in fine cracks, I passed. And rubber can age well before that in terms of traction....
Forum: General Cycling Discussion
05-19-24, 12:12 AM
Replies: 37
Views: 960
Posted By Duragrouch

JB Weld is a known hold-my-beer-Bubba solution,...

JB Weld is a known hold-my-beer-Bubba solution, but in this case, it might actually work. It's an epoxy resin. It's black. It says ok to use on carbon. It's cheap. But I'd still try a dab on...
Forum: Bicycle Mechanics
05-18-24, 11:42 PM
Replies: 17
Views: 262
Posted By Duragrouch

AH, well, if you just mean the roller ID/pin OD...

AH, well, if you just mean the roller ID/pin OD as possible change, yeah. But outside roller diameter, yeah, that's a definite compatibility issue. Of course, I don't think they can patent a...
Forum: Bicycle Mechanics
05-18-24, 11:01 PM
Replies: 11
Views: 228
Posted By Duragrouch

When I put a (non-campy) triple on my road bike,...

When I put a (non-campy) triple on my road bike, the original 105 double FD, worked perfect. It had enough lateral travel (replaced cone and cup BB with slightly longer cartridge BB), and with just a...
Forum: Bicycle Mechanics
05-18-24, 10:45 PM
Replies: 17
Views: 262
Posted By Duragrouch

Thanks as usual, FB. Y'know I wondered about pin...

Thanks as usual, FB. Y'know I wondered about pin size after I posted, but thought, nah, probably same. OP will tell us.

If flat tops use a different roller diameter, that also means only...
Forum: Indoor & Stationary Cycling Forum
05-18-24, 10:05 PM
Replies: 14
Views: 317
Posted By Duragrouch

Wait, what are the inputs, and what are the...

Wait, what are the inputs, and what are the outputs? I'm not sure I see what is being simulated or calculated.
Forum: General Cycling Discussion
05-18-24, 09:55 PM
Replies: 37
Views: 960
Posted By Duragrouch

I could be wrong... but if the area where mat is...

I could be wrong... but if the area where mat is visible seems structurally ok, I think you've got nothing to lose by cleaning that area with something that will clean it but not dissolve any resin,...
Forum: Bicycle Mechanics
05-18-24, 08:37 PM
Replies: 17
Views: 262
Posted By Duragrouch

Like I said, I have zero experience with that...

Like I said, I have zero experience with that modern a system, just trying to logic things out. Fit should be most critical on smallest cog, if it works there, probably others as well.
Forum: Bicycle Mechanics
05-18-24, 08:30 PM
Replies: 17
Views: 262
Posted By Duragrouch

I'm not an expert, but I assume by flat top, you...

I'm not an expert, but I assume by flat top, you mean one of those chain links or connector outer plate that is flat on one side/edge but concave on the other? If so, should work fine, you just...
Forum: General Cycling Discussion
05-18-24, 08:01 PM
Replies: 105
Views: 4,378
Posted By Duragrouch

Derailleurs have no countershaft and churning of...

Derailleurs have no countershaft and churning of 12 constant-mesh spur gears to get 6 speeds like Pinion, or planetary gearsets. Inherently efficient.

Wax: Actually I think it's the reverse; The...
Forum: Touring
05-18-24, 07:42 PM
Replies: 68
Views: 1,766
Posted By Duragrouch

Yes and also someone mentioned a problem, darn...

Yes and also someone mentioned a problem, darn what was it... I think the lithium battery fully charged was ever so slightly overvolt for the CPAP so it wouldn't turn on due to protection circuit,...
Forum: Touring
05-18-24, 07:36 PM
Replies: 68
Views: 1,766
Posted By Duragrouch

I have always run my CPAP with no water or heat,...

I have always run my CPAP with no water or heat, so a lot less cleaning. Only recently after upping pressure have I woke with really dry mouth and throat. But blower alone uses a lot less power,...
Forum: Touring
05-18-24, 06:57 PM
Replies: 68
Views: 1,766
Posted By Duragrouch

Wow I'll have to look for those fuel cells, check...

Wow I'll have to look for those fuel cells, check progress on that.

75% of a car battery per night is a lot. Was that with humidifier and/or tube heat, or just the blower? I had bought an adaptor...
Forum: Touring
05-18-24, 05:54 PM
Replies: 68
Views: 1,766
Posted By Duragrouch

Yes, but it's almost 3/4 the price of a gallon,...

Yes, but it's almost 3/4 the price of a gallon, for 1/4 the quantity. Look on REI, it's $15/quart (MSR) vs $19 for a gallon (Coleman). A quart of Coleman is $12 on amazon.

Many places have stopped...
Forum: General Cycling Discussion
05-18-24, 04:58 PM
Replies: 46
Views: 1,555
Posted By Duragrouch

My guess is the Honda RC30 and subsequent VFR. ...

My guess is the Honda RC30 and subsequent VFR.

I think BMW may have been first on that, not certain, in concert with their shaft drive on the right side. VFRs had single-sided swing arm and chain...
Forum: Bicycle Mechanics
05-18-24, 04:48 PM
Replies: 21
Views: 591
Posted By Duragrouch

Yep, that is definitely of the Big Wire Ring...

Yep, that is definitely of the Big Wire Ring type. Usually when in place, the spring is under light tension, or if higher, insufficient to cause metal fatigue (and it's put in place by slipping over...
Forum: Bicycle Mechanics
05-18-24, 02:36 PM
Replies: 21
Views: 591
Posted By Duragrouch

Is the retaining ring a big wire ring, or a flat...

Is the retaining ring a big wire ring, or a flat plate like a giant c-clip? Is it fixed or free to rotate with respect to the pins? I'm just wondering about why it failed, if under any stress, or...
Forum: General Cycling Discussion
05-18-24, 02:07 PM
Replies: 46
Views: 1,555
Posted By Duragrouch

There's no question, belt-drive is the killer app...

There's no question, belt-drive is the killer app for that frame style. I'm just surprised that style is so widely used in the Dahon line, and not just one model for belts; 99% of the ones sold in...
Forum: Bicycle Mechanics
05-18-24, 03:34 AM
Replies: 43
Views: 1,071
Posted By Duragrouch

Tires: I agree. But my experience has been a...

Tires: I agree. But my experience has been a (rubber) tube is a tube, get best price available.
Forum: Bicycle Mechanics
05-18-24, 03:26 AM
Replies: 22
Views: 472
Posted By Duragrouch

Worked great for me. Lots of bells-and-whistles...

Worked great for me. Lots of bells-and-whistles animations. Lots of info. Except the price darnit. EDIT: Found it at their USA distributer, Vapor Propulsion Labs, just under $900. That may be too...
Forum: Folding Bikes
05-18-24, 03:10 AM
Replies: 153
Views: 11,271
Posted By Duragrouch

That's right. Anyone can grill a good steak....

That's right. Anyone can grill a good steak. Cooking something great from lesser cuts, that's craft. The same for a hundred other things.

When I took poli sci in college, the prof was super great,...
Forum: Folding Bikes
05-17-24, 11:15 PM
Replies: 153
Views: 11,271
Posted By Duragrouch

I do see your point. But I'll bet he actually...

I do see your point. But I'll bet he actually calculated what that 1" clip would do before he cut it. Only thing better, other than using the Deore, would be to calculate that from the get-go, but...
Forum: General Cycling Discussion
05-17-24, 10:33 PM
Replies: 46
Views: 1,555
Posted By Duragrouch

That front frame is basically a Helix, or...

That front frame is basically a Helix, or vice-versa. What brand, model, and year if known? Unless Manitou is the bike and not just the fork.
Forum: Bicycle Mechanics
05-17-24, 10:28 PM
Replies: 43
Views: 747
Posted By Duragrouch

Z-Bend: Clever and versatile, just need spoke...

Z-Bend: Clever and versatile, just need spoke wire. But IMO, they didn't show another advantage: I saw somewhere on here I think months back, a race bike (Trek?) for Greg LeMond, and instead of the...
Forum: Touring
05-17-24, 09:44 PM
Replies: 68
Views: 1,766
Posted By Duragrouch

I think Primus was the first with a combination...

I think Primus was the first with a combination liquid and canister stove. MSR quickly followed suit. I think the Nova also is available that way now. Verstile, but if I want to use cartridges I'll...
Forum: Touring
05-17-24, 09:37 PM
Replies: 68
Views: 1,766
Posted By Duragrouch

I hadn't known, but do see an article about...

I hadn't known, but do see an article about (2022) impending ban of 1lb disposable propane bottles:

https://gearjunkie.com/news/california-single-use-gas-can-ban

That may drive down the cost of...
Forum: Folding Bikes
05-17-24, 07:58 PM
Replies: 153
Views: 11,271
Posted By Duragrouch

But then there's no satisfaction of a mod-job...

But then there's no satisfaction of a mod-job well done. :) "Yep. That'll do it." - Jaime Escalante. It's like wheelbuilding; If I could buy all the components for the same price as a pre-made wheel,...
Forum: Folding Bikes
05-17-24, 04:45 PM
Replies: 153
Views: 11,271
Posted By Duragrouch

(above) Interesting. I assume that since I don't...

(above) Interesting. I assume that since I don't see any cage guard wrapped around the lower idler pulley, you shortened the lower end and not at the upper jockey pulley end. Did you consider leaving...
Forum: Bicycle Mechanics
05-17-24, 04:44 AM
Replies: 22
Views: 472
Posted By Duragrouch

A lot of engines these days come with a magnetic...

A lot of engines these days come with a magnetic drain plug, and that can help a ton, as all the cylinder and ring metal is magnetic, at least for an iron or iron-sleeved enginer. Also, oil filters...
Forum: Bicycle Mechanics
05-17-24, 04:14 AM
Replies: 43
Views: 747
Posted By Duragrouch

Disclaimer: Mine is a narrow segment of the...

Disclaimer: Mine is a narrow segment of the biking population, I think.

Good wheels are not cheap. Thus, I like them to be durable. This would be different if I were running race weight, but over...
Forum: Bicycle Mechanics
05-17-24, 03:52 AM
Replies: 7
Views: 236
Posted By Duragrouch

As I suspected the moment you said Seattle,...

As I suspected the moment you said Seattle, that's Aaron's Bike Repair/Rat City Bikes, they specialize in repair of internal gear hubs of all kinds. I would have been shocked if there were *two*...
Forum: Folding Bikes
05-17-24, 03:21 AM
Replies: 16
Views: 474
Posted By Duragrouch

I was going to suggest perusing craigslist for a...

I was going to suggest perusing craigslist for a used Bike Friday tandem, BFs can be a really good deal that way, if checked out properly, sounds like you are looking at used. Main thing I would stay...
Forum: Bicycle Mechanics
05-17-24, 02:50 AM
Replies: 22
Views: 472
Posted By Duragrouch

I could easily see assembly of cleaner...

I could easily see assembly of cleaner components, post machining. But, for engines at least, it's not a matter of the cylinder bores being smoother or cleaner; They can't be super smooth and have...
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