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Search: Posts Made By: capsicum
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06-26-15, 02:00 PM
Replies: 52
Views: 28,424
Posted By capsicum

"racers" and "light" != cruising, full weight [or...

"racers" and "light" != cruising, full weight [or full weight minus handlebar pressure]
Even at that, racers use about 3 times the pedal force of Joe cruiser, which is a significant reduction in...
07-23-14, 12:46 PM
Replies: 7
Views: 788
Posted By capsicum

Look at them, feel them, are they deeply scarred...

Look at them, feel them, are they deeply scarred or grooved? Otherwise measure them with calipers, 1.5mm is the general spec for solid steel I don't recall what the minimum is for icetec rotors(3...
06-19-14, 07:34 PM
Replies: 37
Views: 2,149
Posted By capsicum

It's a lube when wet a moisture barrier when dry,...

It's a lube when wet a moisture barrier when dry, and prevents items from shaking loose(which is caused by longitudinal vibrations that exceed the preloaded longitudinal strain on the fastener, split...
06-19-14, 06:54 PM
Replies: 109
Views: 7,190
Posted By capsicum

Old methods work, new methods have been developed...

Old methods work, new methods have been developed because the old methods have some weaknesses, pros & cons and all that.

If you use a gage, make sure you treat it well and give it some light oil...
06-19-14, 06:33 PM
Replies: 109
Views: 7,190
Posted By capsicum

The music tuning was an interesting example;...

The music tuning was an interesting example; firstly because a (quality) tuning fork is a standard unit with a known uncertainty, much like the class M2 and F1 calibration masses that I use to check...
06-19-14, 06:12 PM
Replies: 109
Views: 7,190
Posted By capsicum

Yes, it also isn't subject to drift because of a...

Yes, it also isn't subject to drift because of a loud party the night before or seasonal allergies, and can be used with different gage spokes with a quick reference chart.
06-09-14, 03:46 AM
Replies: 109
Views: 7,190
Posted By capsicum

(caution sleep deprived rambling may follow...

(caution sleep deprived rambling may follow :twitchy:)
Farmers don't guess at crop nutrition by eyeballing the leaves, they use a tissue and soil analysis labs.
Boats (other than for nostalgia)...
06-09-14, 02:08 AM
Replies: 14
Views: 1,055
Posted By capsicum

Tension is calculated based on rim nipple-hole...

Tension is calculated based on rim nipple-hole strength, hub spoke-hole strength, and spoke strength. The basic goal is to use a preload (spoke tension) equal to one half of the stress needed to...
06-09-14, 01:39 AM
Replies: 16
Views: 3,888
Posted By capsicum

real citrus solvent is better than mineral...

real citrus solvent is better than mineral spirits, but good luck finding straight D-limonene outside of a wholesale industrial supply house. Most citrus degreasers only have 2-20% D-Limonene.
the...
06-09-14, 01:12 AM
Replies: 31
Views: 2,418
Posted By capsicum

I'm having the same issue, it seems to be a...

I'm having the same issue, it seems to be a recent development,(though I'm not on very frequently these days)
And no "remember me" is not the answer, it is just a kludgey workaround for an actual...
06-09-14, 12:59 AM
Replies: 27
Views: 7,105
Posted By capsicum

I had an annoying click in the cranks years ago,...

I had an annoying click in the cranks years ago, a duller click not a metallic click like a derailer rub, and it was once or twice per crank rev..
It was turned out to be a very slightly loose...
06-08-14, 11:29 PM
Replies: 42
Views: 4,845
Posted By capsicum

Oh and lubricant is not flooded into any gap in...

Oh and lubricant is not flooded into any gap in the chain as bicycle chains have no seals or continuous oil bath, so they could only achieve a thin film at their best.
06-08-14, 11:24 PM
Replies: 42
Views: 4,845
Posted By capsicum

Yes, but the full equations are a bit beyond this...

Yes, but the full equations are a bit beyond this particular issue.
The basic concepts and rule of thumb however are a basic part of lube engineering. The lubricant film thickness has very little to...
05-29-14, 05:56 PM
Replies: 18
Views: 1,423
Posted By capsicum

Bicycle tires are not DOT approved. The bearings...

Bicycle tires are not DOT approved. The bearings themselves assuming a quality brand, could take over 100mph, IF properly greased (about30% fill and channeling type (#2 thickness lithium), as you...
05-29-14, 05:40 PM
Replies: 42
Views: 4,845
Posted By capsicum

Actually the lubricant films found on bicycles,...

Actually the lubricant films found on bicycles, including chains, are sub one micron.

This is true.
...unless you use wax, maybe.
05-26-14, 01:13 PM
Replies: 29
Views: 1,751
Posted By capsicum

I have ten, mostly basket cases.

I have ten, mostly basket cases.
05-26-14, 01:06 PM
Replies: 42
Views: 4,845
Posted By capsicum

I'm a fan of centrifuges but there is a definate...

I'm a fan of centrifuges but there is a definate investment economy of scale there. Centrifuge plus the pump and enough solvent stock to make it worth while. 60 GPH Centrifuge for WVO Motor Oil and...
05-26-14, 03:14 AM
Replies: 0
Views: 514
Posted By capsicum

Looking for some light wide rim options.

So, ever since my first ryno-lite I've been sold on wide rims. However I no longer have that bike as I've out of the game for a few years(life happens) and now I'm putting together a new bike with...
05-26-14, 02:41 AM
Replies: 42
Views: 4,845
Posted By capsicum

Yep, I'm aware of miscibility and we are speaking...

Yep, I'm aware of miscibility and we are speaking of non-polar solutes.(except dumondtech)

toluene and xylene are very similar in most respects, plain benzene is by far the toxic one of the...
05-25-14, 11:10 PM
Replies: 20
Views: 2,333
Posted By capsicum

I haven't taco'd one wheel in the several...

I haven't taco'd one wheel in the several thousand I have trued, only one very light narrow road wheel ever gave me pause, but it just felt springy no effect on trueness.(<5 minutes for decent...
05-25-14, 10:26 PM
Replies: 42
Views: 4,845
Posted By capsicum

Coffee filters are good for about 20 microns and...

Coffee filters are good for about 20 microns and auto oil filters are also good for 20-30 microns.(ish, tests and rating types and efficiency vary) large truck bypass oil filters are about one...
05-25-14, 10:20 PM
Replies: 42
Views: 4,845
Posted By capsicum

D-limonene is "citrus solvent" in its pure form...

D-limonene is "citrus solvent" in its pure form for oils it is stronger than odorless mineral spirits, about equal to turpentine, and weaker than tolulene. The strongest around is an equal mix of...
05-25-14, 10:03 PM
Replies: 21
Views: 1,383
Posted By capsicum

The most important part is making sure the wrench...

The most important part is making sure the wrench its self is narrow enough not to effect the final tightening. Bezalel is right about the torque wrench, but it does give one a basic feel for how...
05-25-14, 09:56 PM
Replies: 59
Views: 5,080
Posted By capsicum

Fair enough, there will always be a weak link.

Fair enough, there will always be a weak link.
05-25-14, 09:47 PM
Replies: 69
Views: 8,308
Posted By capsicum

yes most diagonal cutters have the edges ground...

yes most diagonal cutters have the edges ground on the outside face, which leaves a small tab. They are that way because it makes the edge angle wide enough to stand up to copper and steel wire and...
05-25-14, 09:39 PM
Replies: 20
Views: 2,333
Posted By capsicum

the crackling is from the nipples being unloaded...

the crackling is from the nipples being unloaded enough to spin in there holes and the spokes unwinding. Freshly tensioned and new factory wheels tend to do it a lot, used wheels not much if at all...
05-25-14, 08:35 PM
Replies: 20
Views: 2,333
Posted By capsicum

Starting with a traditional non disk front wheel...

Starting with a traditional non disk front wheel is highly recomended(grab a cheapo from any box store bike for practice, it most likely needs truing anyway)
You need to stress it periodically,...
05-25-14, 08:10 PM
Replies: 59
Views: 5,080
Posted By capsicum

Ah well, I was explaining to FBinNY why he may be...

Ah well, I was explaining to FBinNY why he may be mistaken about the weld not being at fault.

Defects, aka mistakes and anomalies, are to be expected as a statistical percentage, but they are...
05-25-14, 08:04 PM
Replies: 59
Views: 5,080
Posted By capsicum

All those variables in welding are a big reason...

All those variables in welding are a big reason why many frames used lugged construction back in the day. Lugs not only reliably connect the parts but they doubles the thickness and thus reduces...
05-25-14, 07:59 PM
Replies: 59
Views: 5,080
Posted By capsicum

Unfortunatly I don't have enough time for the...

Unfortunatly I don't have enough time for the full shebang, any specific part that you want more than the others?
05-25-14, 07:45 PM
Replies: 21
Views: 1,383
Posted By capsicum

Shops are male dominated because, for practical...

Shops are male dominated because, for practical hiring purposes, female mechanics don't exist. You'll get maybe one in 30-50 that even apply and that is at a place practicing positive affirmative...
05-25-14, 07:35 PM
Replies: 21
Views: 1,383
Posted By capsicum

If you have seen what many customers try to pass...

If you have seen what many customers try to pass off as a home "repair" you would never assume a customer that you don't know is competent with a wrench. Giving advice on mechanics can be a legal...
05-25-14, 07:07 PM
Replies: 59
Views: 5,080
Posted By capsicum

I have significantly more knowledge of welding...

I have significantly more knowledge of welding and metallurgy than a layman, "at a weld" is within the heat affected zone and subject to a number of factors that can adversely affect fatigue life....
05-25-14, 10:21 AM
Replies: 50
Views: 42,340
Posted By capsicum

The technical specs on cog width and spacing for...

The technical specs on cog width and spacing for 6, 7 and 8 are identical. If your derailer doesn't have the capacity for the overall 8 speed width or is bent, twisted, or has worn pivots that could...
05-24-14, 09:28 PM
Replies: 59
Views: 5,080
Posted By capsicum

A weld failure is a defect, not a design issue.

A weld failure is a defect, not a design issue.
05-24-14, 09:12 PM
Replies: 5
Views: 6,109
Posted By capsicum

An unseated axle in the dropouts could cause the...

An unseated axle in the dropouts could cause the wheel to be off center and rub on the side of the brake, but it won't make it wobble.
It's very likely the tire bead did not seat on the rim...
05-24-14, 08:58 PM
Replies: 50
Views: 42,340
Posted By capsicum

First off Shimano uses a 1:2 ratio cable pull on...

First off Shimano uses a 1:2 ratio cable pull on its derailers and sram uses 1:1 so the shimano shifter has to overcome twice the cable tension of a sram.
Second cheap parts are, well, cheap. ...
05-24-14, 08:43 PM
Replies: 109
Views: 13,960
Posted By capsicum

I've built hundreds of new low to high-mid range...

I've built hundreds of new low to high-mid range bikes. On average Tiagra is OK, 105 tunes a lot easier, all the lower end stuff have fewer gears because they lack the precision for 9 or 10 speed...
05-24-14, 08:10 PM
Replies: 26
Views: 3,162
Posted By capsicum

They could just make the cogs out of higher grade...

They could just make the cogs out of higher grade steel, they won't do to the need to sell replacement parts and do to the cost of making parts with ultra-high grade steel. (when something as simple...
05-24-14, 07:35 PM
Replies: 4
Views: 658
Posted By capsicum

I have a topeak floorpump with the smarthead or...

I have a topeak floorpump with the smarthead or whatever they call it, the nozzle accepts both presta and schrader in the same hole with no changes. Anyway I found that when filling shrader valves it...
05-23-14, 08:24 PM
Replies: 21
Views: 16,728
Posted By capsicum

Polyester on of the most chemical resistant...

Polyester on of the most chemical resistant polymers around to the point it's very hard to dye it at the factory. d-limonene worked in a bit, followed by dawn and just a touch of water, agitate by...
05-23-14, 09:52 AM
Replies: 0
Views: 462
Posted By capsicum

Current popularity/state of components?

I've been out of the loop for about 5 years now, but suddenly find myself building up a few frames I had collecting dust in the barn for some family.

Anyway what are the current preferred...
12-13-08, 12:48 AM
Replies: 125
Views: 5,213
Posted By capsicum

In town it actually performs a bit better. In the...

In town it actually performs a bit better. In the dirt there's no contest, and it weighs 200 pounds less than the 2000 cbr600. It's easier and cheaper to work on too.:D
12-12-08, 03:08 PM
Replies: 3
Views: 375
Posted By capsicum

Yes, they are springy.

Yes, they are springy.
12-12-08, 03:02 PM
Replies: 125
Views: 5,213
Posted By capsicum

My 2000 highway worthy, Japanese made, 12v...

My 2000 highway worthy, Japanese made, 12v equipped, distributor-less solid state ignition motorcycle... still has a lever connected to a galvanized rod, connected to another galvanized lever with a...
12-12-08, 02:15 PM
Replies: 19
Views: 834
Posted By capsicum

There was a short lived mens' forum. Personally,...

There was a short lived mens' forum. Personally, I found it to be quite amusing. It was only created in responce to the womens' forum, I can't recall any of the threads as it was several years ago...
12-11-08, 12:03 AM
Replies: 0
Views: 376
Posted By capsicum

New sub forum: bike science

We have "Bike Mechanics" for fixing bikes and "General" for misc. stuff, but enough posts popup here and there that a "Bike Science" sub forum would be justified for all of the physics, chemistry,...
12-10-08, 11:43 PM
Replies: 125
Views: 5,213
Posted By capsicum

An automatic oiler would be more of a real...

An automatic oiler would be more of a real advantage for most folks ...think about it. Just fill a 4 oz resevoir as needed.


I actually went back to downtube friction shifters and 7 speed...
12-03-08, 09:49 PM
Replies: 7
Views: 799
Posted By capsicum

Your probably pushing the head on too hard or too...

Your probably pushing the head on too hard or too far, or not enough, before lifting the lock lever. I had this problem when I first started using my topeak joeblow pro(universal chuck) on shrader...
11-28-08, 02:18 PM
Replies: 23
Views: 21,533
Posted By capsicum

I use threaded shrader on my motorcycles, they...

I use threaded shrader on my motorcycles, they come with double 12mm nuts to really lock 'em in place. Helps keep the tube from shifting during install, loss of valve stem into the tire in the event...
Showing results 1 to 50 of 1000
 


 
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