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Search: Posts Made By: Duragrouch
Showing results 1 to 50 of 1000
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Forum: Bicycle Mechanics
05-07-24, 05:17 PM
Replies: 56
Views: 678
Posted By Duragrouch

I looked at the bead jack, looks interesting. I...

I looked at the bead jack, looks interesting. I can see a possible advantage in being able to lift the bead, and then with your thumb, push it laterally onto the rim. Whereas with tire levers,...
Forum: Bicycle Mechanics
05-07-24, 04:39 PM
Replies: 44
Views: 790
Posted By Duragrouch

Good link, I bookmarked that, thanks. I've...

Good link, I bookmarked that, thanks.

I've seen galling before, but usually with sliding of two metals of similar low hardness under high surface pressure. Rubber brake pads against even soft...
Forum: General Cycling Discussion
05-07-24, 12:00 AM
Replies: 52
Views: 1,475
Posted By Duragrouch

Kris Kristofferson was misdiagnosed with...

Kris Kristofferson was misdiagnosed with Alzheimers and other things for many years until seeing a more knowledgeable doctor who spotted it as Lyme disease immediately, tested, verified, treated,...
Forum: Classic & Vintage
05-06-24, 11:25 PM
Replies: 282
Views: 75,270
Posted By Duragrouch

My first good new bike was an '89 3.0 crit...

My first good new bike was an '89 3.0 crit (R600?), bought it without a single ride based on the article in Bicycling. I probably should have researched more but might not have changed mind for...
Forum: Bicycle Mechanics
05-06-24, 10:56 PM
Replies: 56
Views: 678
Posted By Duragrouch

Probably 20(?) years ago or more, I saw what...

Probably 20(?) years ago or more, I saw what sorta looked like a big crochet needle with hook, to pull tires of and on the same. Supposed to be widely used by bike shops.

I don't need levers to...
Forum: General Cycling Discussion
05-06-24, 10:39 PM
Replies: 144
Views: 3,889
Posted By Duragrouch

On the first day of class in Fluid Dynamics and...

On the first day of class in Fluid Dynamics and Heat Transfer, the prof will tell you that "heat" means by definition the transfer of thermal energy. So heat transfer is redundant. So is means by...
Forum: General Cycling Discussion
05-06-24, 10:23 PM
Replies: 41
Views: 1,094
Posted By Duragrouch

That does sound pretty cool. I guess when on a...

That does sound pretty cool. I guess when on a $6k bike, the cerakote is not that big a cost delta. I've never seen it in person, just know of it from use on other stuff.

I just looked up zombie...
Forum: Bicycle Mechanics
05-06-24, 09:17 PM
Replies: 44
Views: 790
Posted By Duragrouch

Perhaps welded is the wrong term. But I think...

Perhaps welded is the wrong term. But I think somehow got heat bonded to the rim. Perhaps a chip of aluminum in the pad, under hard braking it heats up until suddenly grabs at a spot on the rim and...
Forum: Bicycle Mechanics
05-06-24, 08:10 PM
Replies: 44
Views: 790
Posted By Duragrouch

I don't know why bits like that appear welded to...

I don't know why bits like that appear welded to the rim. I'd never seen this phenomenon on my old race bike with (dark gray) hard anodized rims, but then I also never used it in my current venue of...
Forum: Bicycle Mechanics
05-06-24, 07:52 PM
Replies: 35
Views: 720
Posted By Duragrouch

Stretch compared to steel, perhaps, but kevlar is...

Stretch compared to steel, perhaps, but kevlar is also super stiff. However it's vulnerable to UV light so exposed line is often painted black. Thus it's been largely supplanted by Ultra High...
Forum: Bicycle Mechanics
05-06-24, 07:43 PM
Replies: 106
Views: 19,394
Posted By Duragrouch

(above) Good eye! The large inner plate chamfer...

(above) Good eye! The large inner plate chamfer at the roller is the easiest clue to see, but also surprises me, as either the roller needs to be smaller or the inner plate larger, and the latter...
Forum: Bicycle Mechanics
05-06-24, 07:37 PM
Replies: 56
Views: 678
Posted By Duragrouch

All makes sense, and that along with your note...

All makes sense, and that along with your note about kevlar beads may be a big help to her. As edited above, I relayed the info in the thread.
Forum: General Cycling Discussion
05-06-24, 07:33 PM
Replies: 41
Views: 1,094
Posted By Duragrouch

Sure sounds awful close to celeste green like a...

Sure sounds awful close to celeste green like a Bianchi. :)
Forum: Bicycle Mechanics
05-06-24, 07:23 PM
Replies: 35
Views: 720
Posted By Duragrouch

Just saw this on different thread, from FBinNY,...

Just saw this on different thread, from FBinNY, saying why when he puts the tire on, he puts on opposite the valve first, then works around to the valve (opposite from me):


This makes sense....
Forum: Bicycle Mechanics
05-06-24, 07:19 PM
Replies: 56
Views: 678
Posted By Duragrouch

I questioned valve last, but that makes sense....

I questioned valve last, but that makes sense. Just like a drop-center car wheel. I don't have problems mounting but will remember that.

There's another thread with VegasJen(?) having a terrible...
Forum: Electric Bikes
05-06-24, 07:09 PM
Replies: 14
Views: 571
Posted By Duragrouch

When I first heard of Pinion it was a couple...

When I first heard of Pinion it was a couple years ago, someone on the bike trail mentioned it and I looked it up. IIRC, 12 or 18 speeds with no duplicates. Sounded great, but all bikes equipped with...
Forum: General Cycling Discussion
05-06-24, 02:22 AM
Replies: 15
Views: 323
Posted By Duragrouch

So in other words... think like a single speed. ...

So in other words... think like a single speed.

Or as I read once in an article in Backpacking I think, about different approaches to how much stuff you bring, one person said, "If I need it and I...
Forum: Folding Bikes
05-06-24, 12:05 AM
Replies: 41
Views: 5,194
Posted By Duragrouch

I looked up the original ad for this bike, was...

I looked up the original ad for this bike, was wondering if just a britishy sounding model name, or actually a promo by a cig company; the latter. Nothing like a full two-page ad spread for a bicycle...
Forum: General Cycling Discussion
05-05-24, 11:48 PM
Replies: 24
Views: 1,223
Posted By Duragrouch

OP, I'd generally recommend against 24" wheels...

OP, I'd generally recommend against 24" wheels and tires as the tire selection is very limited, it's the one drawback of the Helix folding bike that only comes that way. 20" wheels are more likely to...
Forum: Electric Bikes
05-05-24, 11:31 PM
Replies: 14
Views: 571
Posted By Duragrouch

Electric AND Pinion gearbox, that does look like...

Electric AND Pinion gearbox, that does look like a smokin' deal! I think it's 20" wheels because they are stronger than larger diameter, and less weight with typical e-bike wide tires. I don't...
Forum: Bicycle Mechanics
05-05-24, 11:17 PM
Replies: 44
Views: 790
Posted By Duragrouch

I have cheap rims and have seen similar before. I...

I have cheap rims and have seen similar before. I put on a set of "new" brake pads that were takeoff from another bike, but (as I discovered later) they were aged enough that the rubber was hard, and...
Forum: General Cycling Discussion
05-05-24, 10:57 PM
Replies: 15
Views: 323
Posted By Duragrouch

I have 2x7 gearing so I'm limited. I don't split...

I have 2x7 gearing so I'm limited. I don't split shifts, just upshift on cassette then at some point upshift chainring and resume. I run between 14-20% jumps, 25% to the lowest cog (although I just...
Forum: General Cycling Discussion
05-05-24, 10:36 PM
Replies: 41
Views: 1,094
Posted By Duragrouch

$8k for me is a ton of money to play with. ...

$8k for me is a ton of money to play with.

My space is extremely limited to only one bike now, but I get the gist of the post. Still, even back in the day, nearly all of my riding was on only one...
Forum: General Cycling Discussion
05-05-24, 09:39 PM
Replies: 144
Views: 3,889
Posted By Duragrouch

Yeah that always irked me, repetitively...

Yeah that always irked me, repetitively redundant. So is "heat transfer".
Forum: General Cycling Discussion
05-05-24, 09:29 PM
Replies: 144
Views: 3,889
Posted By Duragrouch

My phone is with me on rides but location is...

My phone is with me on rides but location is always off unless needed.

My driver's license and credit card are both in foil-backed paper sleeves that are designed for RFID shielding.

If...
Forum: Touring
05-05-24, 08:25 PM
Replies: 120
Views: 8,409
Posted By Duragrouch

I never went reserviors because they're a pain to...

I never went reserviors because they're a pain to clean and prop open to dry to avoid mold. However I was not drinking enough with bottles in cages. Finally got an aero bar with matching drink bottle...
Forum: Folding Bikes
05-05-24, 08:01 PM
Replies: 22
Views: 791
Posted By Duragrouch

I knew about the aluminum can trick, but on...

I knew about the aluminum can trick, but on another thread on this exact subject, someone suggested using a rimmed can, as the rim on top will keep the shim from falling into the seat tube, which I...
Forum: Bicycle Mechanics
05-05-24, 07:27 PM
Replies: 35
Views: 720
Posted By Duragrouch

Totally agree. Rubber has poor heat transfer,...

Totally agree. Rubber has poor heat transfer, you'll burn outside before getting the whole of it hot I think. Hot water has inherent limits on temp, plus good heat transfer and totally enveloping the...
Forum: Advocacy & Safety
05-05-24, 07:02 PM
Replies: 27
Views: 672
Posted By Duragrouch

Truer words were never said. I always recommend...

Truer words were never said. I always recommend people learn sailing in capsizable dinghies (but with masthead floats so they don't turtle, mast fills with water, difficult to right). They become...
Forum: Bicycle Mechanics
05-05-24, 06:51 PM
Replies: 83
Views: 2,107
Posted By Duragrouch

A minute apart. It's like brain waves through the...

A minute apart. It's like brain waves through the aether.
Forum: Bicycle Mechanics
05-05-24, 06:41 PM
Replies: 35
Views: 720
Posted By Duragrouch

That may also be easier if you coil the tire like...

That may also be easier if you coil the tire like a bandsaw blade, so 3 loops 1/3 the diameter, unless the tire is easily foldable.

I really think this is a bead wire sizing issue, not pliability...
Forum: Bicycle Mechanics
05-05-24, 06:12 PM
Replies: 35
Views: 720
Posted By Duragrouch

Is the part that is not seating, always the same...

Is the part that is not seating, always the same part of the tire? If so, perhaps an inconsistency there. If not, unseated part moves around the tire, my only guess is the tire bead diameter is just...
Forum: Bicycle Mechanics
05-05-24, 06:06 PM
Replies: 106
Views: 19,394
Posted By Duragrouch

Hilarious. That would be funny. Scam websites...

Hilarious. That would be funny. Scam websites usually contain english grammar erros or stilted phrasing. I almost got suckered by a clone website of a known brand, looking deeper into the website...
Forum: Bicycle Mechanics
05-05-24, 05:56 PM
Replies: 31
Views: 610
Posted By Duragrouch

Unless the chain gets contaminated with a lot of...

Unless the chain gets contaminated with a lot of outside dirt (like riding in sandy or muddy conditions), the majority of the black contaminant in the cleaning solvent is very, very fine metal...
Forum: Bicycle Mechanics
05-05-24, 05:28 PM
Replies: 27
Views: 587
Posted By Duragrouch

I had these problems when I was not adjusting my...

I had these problems when I was not adjusting my cone-and-cup bearings properly. Leaving the slightest bit of slack, concentrated radial loading in fewer balls at one time and they wore more. Not...
Forum: Folding Bikes
05-05-24, 05:11 PM
Replies: 15
Views: 9,582
Posted By Duragrouch

I think for a bike above the lowest-end, in...

I think for a bike above the lowest-end, in large-wheel road or fixed-frame mountain or hybrid, with wide range gearing and reasonable frame quality, I'd say perhaps yes. But for a folder, those...
Forum: Folding Bikes
05-05-24, 04:39 AM
Replies: 22
Views: 791
Posted By Duragrouch

Careful... this is a family forum. I think I...

Careful... this is a family forum.

I think I may have seen seatposts that way, not sure. But annular ribs (now I'm doing it) are grooves in the wrong direction in terms of bending stress. Possibly...
Forum: Folding Bikes
05-05-24, 12:48 AM
Replies: 22
Views: 791
Posted By Duragrouch

Good to know. I haven't had problems with...

Good to know. I haven't had problems with slipping on my Speed frame and seatpost with the later aluminum shim (not the early plastic shim). Plus the seatpost is not smooth-drawn tubing but looks...
Forum: Bicycle Mechanics
05-04-24, 10:11 PM
Replies: 27
Views: 587
Posted By Duragrouch

I yield to your logic. I knew what I said might...

I yield to your logic. I knew what I said might not apply to cartridge bearings unless the less common angular contact ones. But also what you said above does sound very different configuration than...
Forum: Bicycle Mechanics
05-04-24, 10:02 PM
Replies: 83
Views: 2,107
Posted By Duragrouch

"One valid test is worth a thousand expert...

"One valid test is worth a thousand expert opinions." - engineering proverb
Forum: Bicycle Mechanics
05-04-24, 09:47 PM
Replies: 31
Views: 610
Posted By Duragrouch

Simple Green does not do a good job of dissolving...

Simple Green does not do a good job of dissolving oil on chains, I had tried soaking chains in a solution overnight, poor.

I now clean the chain with mineral oil as solvent, only because near-full...
Forum: Folding Bikes
05-04-24, 09:31 PM
Replies: 22
Views: 791
Posted By Duragrouch

Seatpost shim: If you have a choice, buy one that...

Seatpost shim: If you have a choice, buy one that is longer versus shorter, it spreads the bending load over a longer tube distance, *unless it interferes with folding, on that frame design it...
Forum: Bicycle Mechanics
05-04-24, 09:10 PM
Replies: 83
Views: 2,107
Posted By Duragrouch

Let me precede this by a big healthy "I could be...

Let me precede this by a big healthy "I could be wrong...", but I think a combination of tiny-phone-camera-lensing, plus the sideview curvature of the brake arms, could be producing a slight optical...
Forum: Advocacy & Safety
05-04-24, 08:24 PM
Replies: 27
Views: 672
Posted By Duragrouch

I've now seen several video evaluations of...

I've now seen several video evaluations of e-bikes with powerful motors and big batteries, and the road evaluations are always riding at car (city) speed limits, while using less caution, such as...
Forum: Bicycle Mechanics
05-04-24, 07:11 PM
Replies: 9
Views: 202
Posted By Duragrouch

(above) I agree, and will also add, that 2nd gear...

(above) I agree, and will also add, that 2nd gear on the IGH is direct drive, no planetizing of gears, so even more reliable and not dependent on the internal gears nor wearing them at all, plus...
Forum: Bicycle Mechanics
05-04-24, 06:53 PM
Replies: 9
Views: 202
Posted By Duragrouch

(above) Interesting. I'd be curious if "shielded"...

(above) Interesting. I'd be curious if "shielded" bearings means just greased with a labrynth seal, or rubber exterior seal, or seals on both sides of the bearing, or better yet, cartridge bearings...
Forum: Touring
05-04-24, 05:57 PM
Replies: 120
Views: 8,409
Posted By Duragrouch

I have a quality brand 700c hybrid with flat...

I have a quality brand 700c hybrid with flat bars, with about a mile on it, bought for someone and never used. Sounds like if I put drop bars and shifters on it, it'll have better resale.
Forum: Folding Bikes
05-04-24, 05:48 PM
Replies: 39
Views: 1,009
Posted By Duragrouch

Good to know. I believe you. More data is always...

Good to know. I believe you. More data is always good. I remain objective even if I like a brand. I don't drink the purple koolaid of any entities.



In my looks on craigslist over the past...
Forum: Folding Bikes
05-04-24, 02:52 PM
Replies: 39
Views: 1,009
Posted By Duragrouch

Of course it's also worth mentioning the exploits...

Of course it's also worth mentioning the exploits of his lesser-known descendant, Pilates of Penzance, who once said,
"I am the very model of a clever folding bicycle
A fraction of the space taken...
Forum: Bicycle Mechanics
05-04-24, 02:24 PM
Replies: 83
Views: 2,107
Posted By Duragrouch

Yes but due to the diameter of the tire, I think...

Yes but due to the diameter of the tire, I think you wouldn't even make a dent in the clearance until at least an inch or more spaced out. Hard to see, but based on the pic of the rear caliper, I...
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