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Search: Posts Made By: unterhausen
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Forum: Framebuilders
03-18-24, 06:28 PM
Replies: 4
Views: 77
Posted By unterhausen

Mark, have you ever seen a picture of someone's...

Mark, have you ever seen a picture of someone's steerer boring setup on a lathe? I suppose it's a lot like the fixtures people make to miter unicrown fork blades. I'll have to think about it.
I...
03-18-24, 04:22 PM
Replies: 6
Views: 189
Posted By unterhausen

I was a bike snob when I worked at Trek. I used...

I was a bike snob when I worked at Trek. I used tubing decals to mark which one of my cross country skis was which. Columbus on the right ski, Ishiwata on the wrong ski (sorry sinister'ers).

I...
Forum: Framebuilders
03-18-24, 01:13 PM
Replies: 4
Views: 77
Posted By unterhausen

Can you post a picture of the steerer/crown? I...

Can you post a picture of the steerer/crown? I personally feel more comfortable replacing the entire steerer. But given the bike, I'm wondering if it's a standard steerer.

We have talked about...
Forum: Framebuilders
03-18-24, 12:54 AM
Replies: 4
Views: 202
Posted By unterhausen

That looks nice. Last thing I painted on my lathe...

That looks nice. Last thing I painted on my lathe was with spray cans of ... something. Maybe rustoleum. It seems to be working well. At least it doesn't look like it was painted to be in a clown...
Forum: Framebuilders
03-17-24, 06:27 AM
Replies: 15
Views: 582
Posted By unterhausen

Thanks for the it's nice it went to a builder...

Thanks for the it's nice it went to a builder instead of to scrap. Too bad about the base, I feel like I could have gotten it in my prius after some disassembly. Then I would have been in trouble...
Forum: Framebuilders
03-16-24, 01:56 PM
Replies: 32
Views: 586
Posted By unterhausen

Maybe I shouldn't have brought alignment into it,...

Maybe I shouldn't have brought alignment into it, but I feel like it's a common reason for shimmy. Bob Dopolina (BDop bike parts founder) used to post in every thread about shimmy that he knew that...
03-16-24, 09:25 AM
Replies: 5
Views: 172
Posted By unterhausen

I agree about the lag. Back when my chest strap...

I agree about the lag. Back when my chest strap still worked, the lag in my heartrate doing intervals was pretty long. I suppose regulating to heartrate would be more useful if you wanted to do...
03-15-24, 09:11 PM
Replies: 204
Views: 4,875
Posted By unterhausen

I have to say I haven't seen any personal attacks...

I have to say I haven't seen any personal attacks or any posts that violate our rules. I'm afraid this thread is heading that way though, so let's not psychoanalyze each other in too much detail. If...
03-15-24, 08:24 PM
Replies: 5
Views: 172
Posted By unterhausen

That's really interesting. The first question...

That's really interesting. The first question that comes to mind is "what could go wrong?" It could be the spiral of (literal) death.
I assume that at some point you push a button that says you...
Forum: Framebuilders
03-15-24, 08:16 PM
Replies: 32
Views: 586
Posted By unterhausen

Like I said, shimmy is a fundamental aspect of...

Like I said, shimmy is a fundamental aspect of the steering geometry. I'll admit this doesn't prove it's not stiffness, but I have presented extremely good evidence that it's not on normal bikes. I'm...
Forum: Framebuilders
03-15-24, 03:17 PM
Replies: 32
Views: 586
Posted By unterhausen

Bicycle steering geometry is self-righting, the...

Bicycle steering geometry is self-righting, the front wheel automatically goes back to center. There is also the matter of flop, which drives the wheels away from center. It's a situation that's...
Forum: Framebuilders
03-15-24, 03:06 PM
Replies: 4
Views: 154
Posted By unterhausen

Yeah, sorry I was wrong about it, I guess I was...

Yeah, sorry I was wrong about it, I guess I was thinking about zona. The big difference for the tubes I buy is that life tubes are usually at least a little thicker. But nowadays they have "life...
Forum: Framebuilders
03-14-24, 07:54 PM
Replies: 32
Views: 586
Posted By unterhausen

That's not how structural vibration works, it's...

That's not how structural vibration works, it's really pretty deterministic in a structure like a bicycle. With the right equipment, you can measure the frequencies where it will vibrate. There is...
03-14-24, 07:41 PM
Replies: 204
Views: 4,875
Posted By unterhausen

I think we had an agreement about what you could...

I think we had an agreement about what you could post outside the 'bent forum, which this seems to violate. I know nobody in the 'bent forum would really want to discuss this, but that doesn't mean...
Forum: Framebuilders
03-14-24, 04:36 PM
Replies: 4
Views: 202
Posted By unterhausen

I painted my mill with rustoleum in a gun. Been...

I painted my mill with rustoleum in a gun. Been a while though, and I don't remember what I used to clean. I think it's an enamel though, so mineral spirits or paint thinner should work.
I was...
03-14-24, 04:30 PM
Replies: 12
Views: 451
Posted By unterhausen

that only matters if the newspaper is from the...

that only matters if the newspaper is from the future. That would be weird. Here's how my scenario works. Pick very old newspaper from hoarders stack, wrap bike in it, and then seal the box.
03-14-24, 04:25 PM
Replies: 204
Views: 4,875
Posted By unterhausen

All I can think of is the hour record, but don't...

All I can think of is the hour record, but don't they have a Merckx-rule hour record still? Okay, just did a search, they got rid of it.
Forum: Framebuilders
03-14-24, 12:13 PM
Replies: 4
Views: 154
Posted By unterhausen

Life specs aren't as good. I don't think it...

Life specs aren't as good. I don't think it matters. For my bikes, I get Spirit. I'm hopefully going to be living with the bike long after I forget the difference in price. I assume we're talking...
Forum: Framebuilders
03-14-24, 12:07 PM
Replies: 32
Views: 586
Posted By unterhausen

There has been plenty of research on shimmy on...

There has been plenty of research on shimmy on motorcycles. You can find videos of "tank slappers." They generally don't consider stiffness at all, but the one (simulation based) paper I read that...
03-14-24, 07:33 AM
Replies: 14
Views: 279
Posted By unterhausen

All the Cygolyte headlights I have seen have a...

All the Cygolyte headlights I have seen have a Fresnel lens. So it's shaped, but the shape is symmetric vertically. It actually works fairly well, I keep forgetting there is a cutoff until I turn...
Forum: Framebuilders
03-14-24, 07:26 AM
Replies: 32
Views: 586
Posted By unterhausen

I have seen people that the test in the Pyrenees....

I have seen people that the test in the Pyrenees. was conducted on bikes that didn't fit properly. My '80s racing bike can be terrifying to descend on, because it shimmies at around 30mph if you...
03-12-24, 04:57 PM
Replies: 10
Views: 8,983
Posted By unterhausen

Welcome to the forum. I knew the connection was...

Welcome to the forum.
I knew the connection was at the motor, didn't think about it just being under a cover. I want to put a front rack on my wife's bike, but I have hesitated because the wires...
03-12-24, 12:27 PM
Replies: 67
Views: 1,088
Posted By unterhausen

Okay, now I have to go sit on the floor in the...

Okay, now I have to go sit on the floor in the basement and install netshark on my zwift computer.

FE-C has a whole list of parameters, like rider weight, height, rolling resistance, slope, and...
Forum: Framebuilders
03-12-24, 12:20 PM
Replies: 32
Views: 586
Posted By unterhausen

I try to ignore shimmy being blamed on frame...

I try to ignore shimmy being blamed on frame stiffness, but single oversize tubing generally the same torsional stiffness as standard tubing. Because of wall thickness. But if a touring frame...
03-12-24, 09:22 AM
Replies: 67
Views: 1,088
Posted By unterhausen

I don't think we know that for sure. Only...

I don't think we know that for sure. Only spegler has looked at the data, and he forgot. They still could mess with resistance to simulate aero, they're doing it already somehow. It's just that...
Forum: Framebuilders
03-12-24, 09:04 AM
Replies: 32
Views: 586
Posted By unterhausen

I'm not light, and I tend to push big gears...

I'm not light, and I tend to push big gears occasionally. Standard tubing really isn't as bad as people say, but the effects of propaganda last a very long time. The steel tube manufactures had to...
03-12-24, 06:39 AM
Replies: 67
Views: 1,088
Posted By unterhausen

I think I have seen discussions of drafting on...

I think I have seen discussions of drafting on zwift, and the conclusion was they do it the way they do it for ease of implementation and also because they didn't want to give the full effect of irl...
Forum: Framebuilders
03-12-24, 06:33 AM
Replies: 32
Views: 586
Posted By unterhausen

For a while there, 531 was selling pretty well,...

For a while there, 531 was selling pretty well, but I don't know about now. But you are close to the epicenter of people that would be interested in standard size tubing, I think. Really depends on...
03-11-24, 02:06 PM
Replies: 67
Views: 1,088
Posted By unterhausen

I have had that experience. Riding with a 1.1...

I have had that experience. Riding with a 1.1 w/kg group isn't easy because it takes too little effort. But then get behind for some reason and it feels like they are in an all-out sprint. But...
Forum: Framebuilders
03-11-24, 10:35 AM
Replies: 17
Views: 424
Posted By unterhausen

I'm a bit surprised there is that much variation...

I'm a bit surprised there is that much variation in strength between fillers. Spec sheet I see says, "up to 95000," maybe gasflux uses a nominal strength.
03-11-24, 10:32 AM
Replies: 9
Views: 272
Posted By unterhausen

I wonder if this is why there have been leaked...

I wonder if this is why there have been leaked zwift rides on a velodrome.
03-11-24, 10:30 AM
Replies: 3
Views: 138
Posted By unterhausen

That's an interesting thought, but in my...

That's an interesting thought, but in my experience there are few trainers that aren't wide enough. Most of them would probably take a fatbike.
03-11-24, 10:25 AM
Replies: 67
Views: 1,088
Posted By unterhausen

You can be really far behind now and still be...

You can be really far behind now and still be counted as riding with them. There is a GP Lama where he tested it. It's a lot more than 30 meters.
Tbh, I'm not sure they advertised that you could be...
03-11-24, 07:02 AM
Replies: 67
Views: 1,088
Posted By unterhausen

The increased interval where you are considered...

The increased interval where you are considered to be riding with a pace partner was part of a recent upgrade. You can get really far back now. Getting too far in front seems to be a smaller...
03-10-24, 01:36 PM
Replies: 9
Views: 272
Posted By unterhausen

That sounds like fun. Maybe I should try it.

That sounds like fun. Maybe I should try it.
03-10-24, 01:35 PM
Replies: 3
Views: 138
Posted By unterhausen

Lots of details missing here, but I think you are...

Lots of details missing here, but I think you are talking about mounting a through axle frame to a wheel-on trainer. Wheel off trainers should work, like a Zwift Hub one, Kickr, Kickr Core, and...
03-10-24, 01:31 PM
Replies: 7
Views: 296
Posted By unterhausen

I imagine using edge for login is enough to get...

I imagine using edge for login is enough to get Norton excited. Microsoft pops something up from the task bar occasionally due to zwift starting up, but I'm never wearing my glasses when it happens...
03-10-24, 01:27 PM
Replies: 67
Views: 1,088
Posted By unterhausen

I definitely am a neophyte on zwift not thinking...

I definitely am a neophyte on zwift not thinking about drops. I guess I just have false memories of seeing it affecting xp.

The problem I have is going too hard up the hills and getting too far in...
03-09-24, 01:54 PM
Replies: 12
Views: 451
Posted By unterhausen

I don't think newspaper wrappings will properly...

I don't think newspaper wrappings will properly give you a date on them. People hoard newspaper.
03-09-24, 01:14 PM
Replies: 67
Views: 1,088
Posted By unterhausen

zwift pace partner question

I often get dropped at the top of the hill. Has anyone noticed if they are allowed to go over their nominal w/kg, or do I just suck at riding a bike?

Also, I thought the xp multipliers showed up...
03-09-24, 09:42 AM
Replies: 39
Views: 1,714
Posted By unterhausen

Trek just opened their store here in State...

Trek just opened their store here in State College. I haven't been out there yet, I wonder if I know some of the people that work there. At least if someone wants a domaine, they don't have to go to...
03-09-24, 09:36 AM
Replies: 12
Views: 451
Posted By unterhausen

Magnesium? Some French guy was making them just...

Magnesium? Some French guy was making them just after WWII, I think.
03-09-24, 09:36 AM
Replies: 24
Views: 677
Posted By unterhausen

Top tube length doesn't matter, unless it's too...

Top tube length doesn't matter, unless it's too long. But even then, it would have to be vastly too long to be a problem Have we all forgotten that stems come in more than one length?

If you...
Forum: Framebuilders
03-06-24, 09:52 AM
Replies: 17
Views: 424
Posted By unterhausen

I think the failure of that fork Andy is talking...

I think the failure of that fork Andy is talking about can be traced back to drilling vent holes on the outside diameter of the crown segment. Those crown segments see a lot of fatigue cycles. They...
Forum: Framebuilders
03-05-24, 06:22 PM
Replies: 12
Views: 416
Posted By unterhausen

What PPE do you use? I probably should start...

What PPE do you use? I probably should start wearing a mask when I braze. When I search online for my asthma symptoms, they may actually be COPD symptoms. So brazing/welding is bad news.
Forum: Framebuilders
03-05-24, 12:15 PM
Replies: 2
Views: 118
Posted By unterhausen

Do you have both of those tubesets available to...

Do you have both of those tubesets available to build with?
Forum: Framebuilders
03-05-24, 10:28 AM
Replies: 15
Views: 582
Posted By unterhausen

Outside vise would be nice to have. That's one...

Outside vise would be nice to have. That's one reason I want a work shed, so I can have a porch to work on.
Forum: Framebuilders
03-05-24, 10:26 AM
Replies: 5
Views: 166
Posted By unterhausen

I have always wondered if one of the existing...

I have always wondered if one of the existing framebuilding companies would special order one for you. I get the impression they only order a few times a year. Might be worth talking to someone if...
Forum: Framebuilders
03-05-24, 10:23 AM
Replies: 12
Views: 416
Posted By unterhausen

It's going to be difficult to flow silver into...

It's going to be difficult to flow silver into there because you can't clean it properly. I have had luck with brass and dirty surfaces, but that takes a real torch. The problem with not having any...
03-04-24, 06:08 PM
Replies: 27
Views: 732
Posted By unterhausen

people been posting gravel races in the gravel...

people been posting gravel races in the gravel forum since forever. I guess there are some serious gravel racers here, but in Central PA they mostly seem like organized rides that somehow get called...
Showing results 1 to 50 of 1000
 


 
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