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Search: Posts Made By: WizardOfBoz
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10-20-21, 08:48 PM
Replies: 29
Views: 437
Posted By WizardOfBoz

To the above add this: If someone did sue you,...

To the above add this: If someone did sue you, and you were essentially running the business without insurance, they can go after your personal assets (house, car, bank account). That's why you...
10-17-21, 12:59 PM
Replies: 20
Views: 504
Posted By WizardOfBoz

Agree, and the same front and back may be better...

Agree, and the same front and back may be better for disc brake bikes. Disc brakes allow the easier use of CF rims which are stiffer and don't need 40 or 36 spoke support. I use rim brakes (that...
10-16-21, 01:59 PM
Replies: 20
Views: 267
Posted By WizardOfBoz

Oh... You're talking about the bike.

Oh... You're talking about the bike.
10-16-21, 01:08 PM
Replies: 20
Views: 504
Posted By WizardOfBoz

I weight about 245# and have been riding on the...

I weight about 245# and have been riding on the roads on 20h wheels (Botrager Race XXX, and Paradigm). I hit a pothole and the rim is a little wonky (the seam is very slighlty sprung I think). I'm...
10-16-21, 12:58 PM
Replies: 23
Views: 429
Posted By WizardOfBoz

Oy. I had a friend in grade school with the same...

Oy. I had a friend in grade school with the same one nut problem. We called him "Uno", as I recall. Cruelty of youth..
10-16-21, 11:03 AM
Replies: 23
Views: 429
Posted By WizardOfBoz

Thankfully I've never had to defuse live...

Thankfully I've never had to defuse live ordnance. I did work for the gas company one summer, and if a fitting leaked it probably made good sense to use a non-sparking wrench. But they had union...
10-15-21, 03:57 PM
Replies: 23
Views: 429
Posted By WizardOfBoz

Good heavens. Grade 4 Ti is close to pure...

Good heavens. Grade 4 Ti is close to pure (unalloyed) Ti and as such is soft (but strong). The sellers claim to sell these to Explosive Ordnance Disposal folks. If my life depended upon a...
10-09-21, 04:01 PM
Replies: 32
Views: 619
Posted By WizardOfBoz

;tldr, but Try running a nipple down onto...

;tldr, but

Try running a nipple down onto the spoke all the way (gently!) to see if the spoke end protrudes and by how much. If it sticks out 2 mm, and you look into the installed spokes and see...
10-08-21, 08:29 PM
Replies: 17
Views: 424
Posted By WizardOfBoz

There are spacers you can play around with. ...

There are spacers you can play around with. There's a discussion here: https://www.bikeforums.net/bicycle-mechanics/165758-126mm-8-9-speed-upgrade.html

If you want to go with a native 7 speed, no...
09-30-21, 10:15 AM
Replies: 11
Views: 314
Posted By WizardOfBoz

I agree with those that say the steerer tube is...

I agree with those that say the steerer tube is going to be fine. I'd be worried about the stem cracking if one bolt was tightened where there was no steerer tube. Also, the stem could more easily...
09-29-21, 08:38 PM
Replies: 11
Views: 314
Posted By WizardOfBoz

Yup. If you want the handlebars higher, can you...

Yup. If you want the handlebars higher, can you you find a step with a steeper angle?
09-28-21, 09:44 PM
Replies: 7
Views: 264
Posted By WizardOfBoz

Andy, the neck near the crown appears to be...

Andy, the neck near the crown appears to be 26.41mm, which is larger than the 26.0mm about 10mm above the crown. And the tube is 25.4mm. I'm not sure what the ID of the crown bearing seat was, but...
09-28-21, 12:23 PM
Replies: 7
Views: 264
Posted By WizardOfBoz

dsaul, I've installed crown races. That is TRUE...

dsaul, I've installed crown races. That is TRUE crown races that actually have a bearing race (Campy Nuovo Record). But not new crown ... bearing seats? Is that a clear name? Also, never installed...
09-27-21, 08:08 PM
Replies: 7
Views: 264
Posted By WizardOfBoz

Can't get headset base gasket onto 1" steerer.

Bought a Ritchey 1" steerer CF fork for my 1999 Lemond Zurich. Base is nominally (IIRC) 26.4mm. Cane creek headset 40, size EC30. I think that the bottom part of the headset is supposed to be 26.4...
09-23-21, 12:55 PM
Replies: 83
Views: 2,433
Posted By WizardOfBoz

As someone who has gone over the handlebars and...

As someone who has gone over the handlebars and landed on my chin due to trying to optimize improperly (and who grew up working in a machine shop and now has a PhD in Engineering) I would suggest...
09-22-21, 07:58 PM
Replies: 3
Views: 218
Posted By WizardOfBoz

Were there 1" threadless steerer tube stems at one point?

I have a 1999 Lemond with a 22 year old CF fork. May be fine, but not sure I trust it. I bought a Ritchey CF fork with a 1" Al steerer tube. I can put the stem on with an adapter. But were there...
09-22-21, 07:55 PM
Replies: 20
Views: 631
Posted By WizardOfBoz

Ah, the Wizard of Boz's google foo is powerful......

Ah, the Wizard of Boz's google foo is powerful...

Seriously, glad this helped. I do have a bit of a problem with the way the guy welded this, though. I would think that he should have left a...
09-19-21, 04:24 PM
Replies: 20
Views: 631
Posted By WizardOfBoz

This was interesting, May give you an idea for...

This was interesting, May give you an idea for your fork.

https://www.youtube.com/watch?v=TtOeCtNBUwg
08-25-21, 07:56 PM
Replies: 5
Views: 291
Posted By WizardOfBoz

If you were a machinist you might be able to...

If you were a machinist you might be able to machine the red ring, have it anodized, machine off the old one (epoxy is probably used - you won't get the ring off with solvent I suspect) and then glue...
08-25-21, 05:50 AM
Replies: 5
Views: 291
Posted By WizardOfBoz

If you've broken the red ring on the hub, I see...

If you've broken the red ring on the hub, I see no alternative but to buy a new hub.
...
08-22-21, 07:47 PM
Replies: 17
Views: 587
Posted By WizardOfBoz

Yes, stop with the sanding discussion already. ...

Yes, stop with the sanding discussion already. Sanding will remove metal and damage carbon. Sanding will do much more damage to your fork than the normal, minimal amount of oxidation on the fork...
08-22-21, 10:27 AM
Replies: 17
Views: 587
Posted By WizardOfBoz

Uhhh. So pure aluminum in air forms an oxide...

Uhhh. So pure aluminum in air forms an oxide layer almost immediately. As pointed out by cycommute, this layer is a pretty strong barrier to further oxidation. Chemicals (e.g salt air near the sea...
08-15-21, 07:50 PM
Replies: 4
Views: 371
Posted By WizardOfBoz

Probably a Stronglight A6. :) You need a square...

Probably a Stronglight A6. :) You need a square taper bottom bracket.

See here (https://www.sheldonbrown.com/bbtaper.html) for an orientation about square taper. I think you want an ISO taper (not...
08-14-21, 01:36 PM
Replies: 7
Views: 495
Posted By WizardOfBoz

Just to be clear, carbon paste is a mix of silica...

Just to be clear, carbon paste is a mix of silica grit, carbon black, and a grease-like or gel-like substance. It is designed to keep clamped parts from slipping, It is highly abrasive. It should...
08-09-21, 07:56 PM
Replies: 13
Views: 525
Posted By WizardOfBoz

I iike it a lot, and I have a Park stand. Mine...

I iike it a lot, and I have a Park stand. Mine works great, but yours is .... cool.
08-08-21, 07:34 PM
Replies: 12
Views: 426
Posted By WizardOfBoz

The seller is parting with it because he doesn't...

The seller is parting with it because he doesn't like the steering stability....
08-05-21, 08:19 PM
Replies: 11
Views: 476
Posted By WizardOfBoz

Good heavens, I believe that you're correct. If...

Good heavens, I believe that you're correct. If F is the thrust your wheel generates forward, then the force on the freewheel from the chain is F*R/r where R is the wheel radius, and r is the radius...
08-05-21, 06:31 AM
Replies: 11
Views: 476
Posted By WizardOfBoz

I'd be happy to be corrected and to learn...

I'd be happy to be corrected and to learn something, but when I think of the chainstay, it's mostly in tension. A dimple in a tube under tension doesn't scare me as much as a dimple in something in...
08-01-21, 01:08 PM
Replies: 32
Views: 1,345
Posted By WizardOfBoz

I'd suggest not using a rejuvenator. The rubber...

I'd suggest not using a rejuvenator. The rubber in brake pads is engineered to work well when new, and for a reasonable service life. Part of the engineering is to include chemicals called...
07-19-21, 09:27 AM
Replies: 81
Views: 2,399
Posted By WizardOfBoz

Not sure if Ti galls with other metals. I don't...

Not sure if Ti galls with other metals. I don't think so. So, it would appear that your threads have corroded together. One often used tool for this is heat, applied by a rosebud flame. Make sure...
07-08-21, 02:53 PM
Replies: 19
Views: 630
Posted By WizardOfBoz

First approach would be to carefully put the...

First approach would be to carefully put the lever in a vise, then use a thin needle nosed plier to grab the cable opposite the Bowden stop (this type of cable is called a Bowden cable, in case...
05-14-21, 08:00 AM
Replies: 10
Views: 680
Posted By WizardOfBoz

A quick review of pedals offered by Shimano...

A quick review of pedals offered by Shimano confirms that their SPD offerings seem not to include Ti spindles. Their SPD spindles (even the XTR trim level) are about the same weight as what the OP...
05-13-21, 09:42 AM
Replies: 10
Views: 680
Posted By WizardOfBoz

Pure Ti and some of the less rigorously...

Pure Ti and some of the less rigorously controlled (Tofu-grade) Ti stock from China are not as strong as steel. But some Ti alloys (Ti-6Al-4V - Grade 5, is at 1100 MPa, or 160,000 psi yield strength)...
05-02-21, 03:01 PM
Replies: 25
Views: 1,387
Posted By WizardOfBoz

Good memory: "like dissolves like" is a great...

Good memory: "like dissolves like" is a great mnemonic for physical chemistry (and has the added advantage of being true).

I do remember hearing about machine and/or paint shop guys that would use...
04-17-21, 11:06 PM
Replies: 45
Views: 1,542
Posted By WizardOfBoz

Imagine lying on a prone bike holding a spoke....

Imagine lying on a prone bike holding a spoke. You can reach out to the front wheel. You want the bike to move. Do you hold the spoke near the center of the hub and try to use the stiffness of the...
04-13-21, 07:36 PM
Replies: 19
Views: 1,144
Posted By WizardOfBoz

Having said that, I recall using a vapor...

Having said that, I recall using a vapor degreaser. It was a large vat, 4 feet by 4 feet, and about 3 feet deep. Heater in the bottom. Bottom was full of carbon tet. Turn on the heater, the CCl4...
04-13-21, 07:30 PM
Replies: 19
Views: 1,144
Posted By WizardOfBoz

Open? I mean, you can put the alcohol and the...

Open? I mean, you can put the alcohol and the parts in a baggie and put it into a water bath, and its pretty safe.

Having been very near to fatal industrial accidents, I tend to try to eliminate...
04-12-21, 07:04 PM
Replies: 19
Views: 1,144
Posted By WizardOfBoz

Just to be clear: DON'T use kerosine or mineral...

Just to be clear: DON'T use kerosine or mineral spirits in an ultrsonic cleaner. Very bad karma.
04-04-21, 09:47 AM
Replies: 34
Views: 1,454
Posted By WizardOfBoz

Not exactly. Acetone is pretty effective at...

Not exactly. Acetone is pretty effective at cleaning paint out of natural bristle brushes. If you spill it directly on a finish, or try wipe a finish with an acetone-soaked rag, it will remove...
03-27-21, 09:47 PM
Replies: 16
Views: 561
Posted By WizardOfBoz

Ok, it sounds like you know exactly what it takes...

Ok, it sounds like you know exactly what it takes to build wheels, and the rims are about the same size.

Isn't the answer really your personal preference?
03-27-21, 09:11 AM
Replies: 16
Views: 561
Posted By WizardOfBoz

You have quite a few relatives in Lancaster, PA?...

You have quite a few relatives in Lancaster, PA? Are you Amish?

Anyway, if you want to swap rims it does take some effort but its not rocket surgery. All the advice above (if it ain't broke, don't...
03-20-21, 08:53 AM
Replies: 19
Views: 842
Posted By WizardOfBoz

I like this kind of project. 1) You salvage...

I like this kind of project. 1) You salvage something that somebody made, 2) you have the satisfaction of learning and completing a project, and 3) you get to go riding.

I'm an engineer and...
03-15-21, 07:46 PM
Replies: 19
Views: 842
Posted By WizardOfBoz

The good news is that you'll have a serviceable...

The good news is that you'll have a serviceable tap handle. The bad news is that set may not have metric fine in 4.5mm (MF4.5 x 0.5) which is what I think you need. You can try a cheap Chinese tap...
03-14-21, 07:48 PM
Replies: 19
Views: 842
Posted By WizardOfBoz

Ah, so a 4.1mm screw may be a 3/16 inch screw....

Ah, so a 4.1mm screw may be a 3/16 inch screw. Probably not metric (an M4 would be about 3.9mm, and M4.5 about 4.4mm). So, come to think of it, its probably an #8-32 screw. But no never mind: if the...
03-14-21, 01:52 PM
Replies: 19
Views: 842
Posted By WizardOfBoz

Hold up here. You say you have a 4mm fine pitch...

Hold up here. You say you have a 4mm fine pitch screw. That's probably MF4 (with a 0.5mm* pitch, btw, in case you want to try to order one). The tapped hole that this fits into has a minor diameter...
03-04-21, 05:49 AM
Replies: 24
Views: 1,343
Posted By WizardOfBoz

Ah, sorry. BTW, do you have a line on cheap...

Ah, sorry. BTW, do you have a line on cheap oysters? Every time I lube my chain, it costs me about 40 bucks at Whole Foods...
03-02-21, 05:26 AM
Replies: 17
Views: 715
Posted By WizardOfBoz

Yeah, this. There are so many hassles and...

Yeah, this. There are so many hassles and possible failure modes for this, from being hard to get the old hub out, to bending spokes, and losing nipples, and if you happen to unscrew the nipple and...
03-01-21, 08:05 PM
Replies: 24
Views: 1,343
Posted By WizardOfBoz

You're ignoring the lated published research that...

You're ignoring the lated published research that shows that fried oysters reduce chain friction by 0.02 Watts compared to PTFE in paraffin, 0.03W compared to triflow, and 0.04W compared to motor...
02-10-21, 06:27 AM
Replies: 49
Views: 1,780
Posted By WizardOfBoz

Andy Stewart, I like your South Bend Lathe. I can...

Andy Stewart, I like your South Bend Lathe. I can see the way scraping. Did you re-scrape the ways?
02-07-21, 12:23 PM
Replies: 49
Views: 1,780
Posted By WizardOfBoz

Yeah, I was gonna say "I can't tell you but I...

Yeah, I was gonna say "I can't tell you but I know its mine".

On a more serious note I have a bunch of tools from my Dad's mfg shop. A set of Starrett punches from the 50s or 60s. A full set of...
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