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Search: Posts Made By: jccaclimber
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07-04-22, 02:11 AM
Replies: 36
Views: 886
Posted By jccaclimber

Every day I browse the mechanics sub and am...

Every day I browse the mechanics sub and am always amazed that this thread, which has long since solved the OPís issue, continues to gain new posts. When ever will it die?

Based on other comments,...
06-30-22, 01:13 PM
Replies: 34
Views: 825
Posted By jccaclimber

My general rule for advising others on upgrades...

My general rule for advising others on upgrades is as follows:
1. If itís a toy, in budget, and you want it to try out, go buy it without regret. Just donít complain if that money does nothing...
06-29-22, 08:40 PM
Replies: 13
Views: 375
Posted By jccaclimber

The wax in that paper is just like the shipping...

The wax in that paper is just like the shipping grease on a new chain. It should be carefully removed with the solvent of your choice in an ultrasonic cleaner, then replaced with a less dirt...
06-27-22, 07:02 PM
Replies: 13
Views: 679
Posted By jccaclimber

So youíre trying to make a profit in a field you...

So youíre trying to make a profit in a field you arenít knowledgeable in and donít want to invest in time or proper tools?

There are plenty of ways to measure fasteners. You can use calipers for...
06-17-22, 10:28 PM
Replies: 29
Views: 596
Posted By jccaclimber

Iíll start with pointing out that even just an...

Iíll start with pointing out that even just an elbow rest suddenly coming loose at an unexpected time can be disastrous. That said, if you want to accept the risk here are a few thoughts:
1. It...
06-10-22, 06:07 PM
Replies: 15
Views: 4,243
Posted By jccaclimber

A little wear where the rib goes doesnít matter,...

A little wear where the rib goes doesnít matter, itís just there so the bolt doesnít spin. Some seatpost bolts have a hex opening in both sides, so itís even less necessary. Also note, Campy seatpost...
06-08-22, 12:27 PM
Replies: 29
Views: 701
Posted By jccaclimber

Assuming good care, Iíve seen very few worn out...

Assuming good care, Iíve seen very few worn out frames, brake levers (hoods are another story), front derailers, and really rear derailers other than the wheels and occasionally a return spring.
...
06-07-22, 06:06 PM
Replies: 8
Views: 288
Posted By jccaclimber

Rolla covered it well. If your derailer hanger...

Rolla covered it well. If your derailer hanger is bent, then even after replacing everything you listed, your shifting still won't work well. The amount a derailer hanger needs to be off by to...
05-28-22, 01:36 PM
Replies: 35
Views: 961
Posted By jccaclimber

1. The need to shift multiple gears at once is a...

1. The need to shift multiple gears at once is a function of how far ahead you can plan and and how fast the grade is changing. I live in a very hilly area and there are a few places on my commute...
05-22-22, 01:02 PM
Replies: 21
Views: 511
Posted By jccaclimber

The issue is that the manufacturer changed...

The issue is that the manufacturer changed ownership and decided to stop selling them.
The limited remaining NOS parts available in the second hand market are priced in a way that you might as well...
05-16-22, 02:05 AM
Replies: 39
Views: 858
Posted By jccaclimber

This sounds like a fine case of a lack of...

This sounds like a fine case of a lack of understanding leading to anger after someone tries to replace understanding with more force.

As to threads, while many *bicycle* torque specs assume...
05-08-22, 02:39 AM
Replies: 7
Views: 786
Posted By jccaclimber

As someone who had built a few recumbents and...

As someone who had built a few recumbents and ridden a lot more, many of them have absolutely appalling chain management.

Other than old or really cheap frames, tandems tend not to have them for...
05-01-22, 03:59 PM
Replies: 50
Views: 1,311
Posted By jccaclimber

1. Thatís a really clear photo. 2. That is not...

1. Thatís a really clear photo.
2. That is not normal.
3. Unless you kept you chain hear a hydrogen source or an acid (which probably would have also rusted it), I doubt this was caused by anything...
04-25-22, 05:01 PM
Replies: 23
Views: 699
Posted By jccaclimber

Saying all oils of a given SAE/ISO/whatever...

Saying all oils of a given SAE/ISO/whatever viscosity are the same is a bit like telling the police officer that Pepsi and Sam Adams are both mostly water. Itís close enough to true for those only...
04-25-22, 02:03 AM
Replies: 23
Views: 699
Posted By jccaclimber

When using oil on chains Iíve found Triflow, or...

When using oil on chains Iíve found Triflow, or any other bike chain lubricant to be close enough and readily available online and at sporting goods stores.
Personally I usually use a wax based lube...
03-05-22, 07:29 AM
Replies: 27
Views: 749
Posted By jccaclimber

McMaster Carr PN 7289A62, in stock, <$5 plus an...

McMaster Carr PN 7289A62, in stock, <$5 plus an always reasonable shipping charge. Their ground rate shipping usually shows up next day by some miracle, even cross country. They also have sockets in...
03-03-22, 12:20 AM
Replies: 9
Views: 1,518
Posted By jccaclimber

For anyone that asks in the future, Iíve used the...

For anyone that asks in the future, Iíve used the 3 bike version of the Saris Bones to move a tandem many times without issue. I do take the wheels off, but this is just to keep it narrower as I had...
01-25-22, 01:10 AM
Replies: 20
Views: 530
Posted By jccaclimber

How fast are you spinning? Those arenít meant to...

How fast are you spinning? Those arenít meant to be used at in the upper half of the speed range on at least name brand Dremel tools.
A lighter tool is going to have a harder time keeping vibration...
01-06-22, 02:34 AM
Replies: 14
Views: 1,177
Posted By jccaclimber

Sitting in the wrong gear when you secured the...

Sitting in the wrong gear when you secured the cable? Disconnect the cable and see if it travels across all rear sprockets when pushed by hand. Also verify the limit screws are out, not in.
12-19-21, 01:47 AM
Replies: 5
Views: 1,147
Posted By jccaclimber

In my case the wheel bag is soft (with some...

In my case the wheel bag is soft (with some cardboard protection that was slipped in), so it at least fits in the frame case. It probably wouldn't cost that much to ship the empty case back after...
11-17-21, 10:17 PM
Replies: 38
Views: 3,986
Posted By jccaclimber

With all of this conversation about bead...

With all of this conversation about bead expansion, I wonder if the aluminum rim expands faster than the bead does anyways? As a bare material it certainly does, I'm just not sure what it does as a...
11-05-21, 09:59 PM
Replies: 36
Views: 1,291
Posted By jccaclimber

1. It's been alluded to already, but a hop at the...

1. It's been alluded to already, but a hop at the valve stem implies the thick part of the tube around the stem is under the bead. When I install a tire I:
Line the pressure marking up with the...
09-30-21, 01:01 AM
Replies: 41
Views: 4,930
Posted By jccaclimber

I'm starting to remember why I decided to spend...

I'm starting to remember why I decided to spend my time in other forums so many years ago.
09-25-21, 12:39 PM
Replies: 9
Views: 1,063
Posted By jccaclimber

Search this link for ďalternate cable routingĒ ...

Search this link for ďalternate cable routingĒ

https://www.sheldonbrown.com/drivetrain-mixing.shtml
09-22-21, 01:18 AM
Replies: 27
Views: 3,407
Posted By jccaclimber

Similar to the above, but I no longer grind my...

Similar to the above, but I no longer grind my housings after cutting. With shifter housing Iím typically happy with the cut, but I have good cutters. Brake or any other spiral housing I now file...
09-09-21, 01:26 AM
Replies: 39
Views: 1,251
Posted By jccaclimber

For the record, the threads on a screw do add...

For the record, the threads on a screw do add strength. This is why for calculations the stressed diameter is larger than the minor diameter. That said, youíll probably be fine, itís a small...
09-04-21, 02:08 AM
Replies: 8
Views: 1,346
Posted By jccaclimber

The rear hub is likely threaded for an Arai drum...

The rear hub is likely threaded for an Arai drum so yes, intended for tandems. They have not been made new in quite a while, but are still available used and they donít tend to wear out. I have one...
09-03-21, 12:42 AM
Replies: 8
Views: 1,346
Posted By jccaclimber

https://www.bikeforums.net/tandem-cycling/1236421-...

https://www.bikeforums.net/tandem-cycling/1236421-tandem-work-stand.html

After you ride it around solo for a bit (they handle like a bus the first time or two) get someone nearby to ride it with...
09-01-21, 11:49 PM
Replies: 29
Views: 4,419
Posted By jccaclimber

My list from (single) road bikes tends to be: ...

My list from (single) road bikes tends to be:
Ancient and/or cheap:
French thread bottom brackets
Mixte frames
Cottered cranks
Lack of a derailer hanger
Chromed steel rims
Any frame with a...
08-29-21, 02:39 AM
Replies: 14
Views: 805
Posted By jccaclimber

Honestly a frame upside down is nicer than a...

Honestly a frame upside down is nicer than a crummy truing stand.
The point of a tool is to improve things. A cheap truing stand does not do that, and a frame works better than one might think.
08-25-21, 01:54 AM
Replies: 35
Views: 2,213
Posted By jccaclimber

^ I wouldnít guarantee that. Auto mechanics...

^
I wouldnít guarantee that. Auto mechanics often get awful pay, especially considering that they typically have to provide their own rather expensive tools.
Machinists in many places ( actually it...
08-24-21, 12:15 PM
Replies: 35
Views: 2,213
Posted By jccaclimber

Normally Glassdoor under lists compensation for...

Normally Glassdoor under lists compensation for Bay Area positions, but I think this might be one case where selection bias is making it over-report.
I don't want to discourage anyone from following...
08-21-21, 10:40 PM
Replies: 35
Views: 2,213
Posted By jccaclimber

Just backing this out, $400 at 2 hours of actual...

Just backing this out, $400 at 2 hours of actual fitting, 20 minutes of answering questions to random people for every actual fit, two 20 minute follow up conversations per fit. Aim really high and...
08-15-21, 07:23 PM
Replies: 14
Views: 1,322
Posted By jccaclimber

TLDR: For infrequent home use, the cheap ones...

TLDR: For infrequent home use, the cheap ones will be fine. Drive size doesn't really matter, although it's nice if it matches up with your tools. Remember, you'll need either a set of metric Allen...
08-12-21, 09:34 PM
Replies: 9
Views: 1,117
Posted By jccaclimber

One additional thought, I have a Mixte 1976...

One additional thought, I have a Mixte 1976 LeJeune that doesn't need to go home, but it can't stay here. You're not far from me, so I'll send you a PM.
08-12-21, 09:26 PM
Replies: 9
Views: 1,117
Posted By jccaclimber

This link may help answer that as well. ...

This link may help answer that as well.
https://velo-orange.blogspot.com/2017/09/canti-post-sizing-psa.html
The TLDR is that current cantilever post spacing is in the 77 to 85 mm range, but some...
08-10-21, 01:48 AM
Replies: 6
Views: 1,690
Posted By jccaclimber

I see three options. The first is to learn to...

I see three options.
The first is to learn to shift really well on an uphill. In short you have to stop applying load, but keep the pedals turning, as the chain transitions. I describe it as...
07-22-21, 06:55 AM
Replies: 11
Views: 627
Posted By jccaclimber

If this were me and I was using SolidWorks I...

If this were me and I was using SolidWorks I would take a very square photo, insert it as a sketch aid, zoom in, and draw a spline to fit.

Is it a NACA profile by chance?

For a one off,...
07-16-21, 01:25 AM
Replies: 27
Views: 4,281
Posted By jccaclimber

Congratulations on a solid analysis. You're...

Congratulations on a solid analysis. You're ahead of many of the manufacturing engineers I've worked with over the years, who I've had to remind to put an indicator on and measure things. The...
07-10-21, 04:03 AM
Replies: 30
Views: 1,431
Posted By jccaclimber

1. Clean out the seat tube as best as possible...

1. Clean out the seat tube as best as possible first.
2. Find an adhesive that can be easily softened with heat, a chemical, etc. Make a tube that just fits inside the stuck seat post and glue it...
07-06-21, 01:16 AM
Replies: 15
Views: 1,040
Posted By jccaclimber

This seems like a fairly high risk low reward...

This seems like a fairly high risk low reward sort of project, but I guess it's better than 3d printing a disc brake rotor.
If you wanted to 3d print a seat integrated into a seat tube I'd call that...
07-02-21, 02:21 PM
Replies: 27
Views: 2,607
Posted By jccaclimber

I'm making some assumptions, but that's actually...

I'm making some assumptions, but that's actually a really helpful diagram. If I had to guess:
You remove the rear brake and set screw E first. At that point you can remove F by threading a screw...
07-02-21, 02:04 PM
Replies: 7
Views: 650
Posted By jccaclimber

The stand works well enough, but the OPís...

The stand works well enough, but the OPís solution also looks perfectly serviceable, and probably used parts on hand.
07-01-21, 04:07 PM
Replies: 23
Views: 874
Posted By jccaclimber

Proper use of the correct tool and not using ball...

Proper use of the correct tool and not using ball end tools on overly tight fasteners will fix 95% of stripped fastener issues.
I deal with a lot of bikes on poor condition at a local co-op. ...
06-29-21, 12:37 AM
Replies: 14
Views: 1,343
Posted By jccaclimber

As above, plastic sleeve on a steel shaft,...

As above, plastic sleeve on a steel shaft, typically some grease in between.
I was recently surprised to discover just that on the off brand SPD pedals on one of my wife's bike-. I suspect they...
06-28-21, 12:58 AM
Replies: 28
Views: 2,120
Posted By jccaclimber

Always good to get miles on a bike. Most...

Always good to get miles on a bike.
Most shifter housing made in the last decade or two is a plastic sleeve on the inside, a series of metal strands in the middle, and a plastic shell on the...
06-27-21, 06:52 PM
Replies: 29
Views: 10,821
Posted By jccaclimber

Seeing as we're all having productive fun with a...

Seeing as we're all having productive fun with a zombie thread I'll chime in:
1. If I had proof (eg, e-mail receipt) of purchase I'd certainly expect the manufacturer to he more helpful. I do...
06-27-21, 06:12 PM
Replies: 28
Views: 2,120
Posted By jccaclimber

1. In the post #7 picture #6 the front shift...

1. In the post #7 picture #6 the front shift housing is wrapped around the rear shift and rear brake housing. Those shouldn't cross, and if they do they should be loose through the full rotation of...
06-20-21, 08:40 PM
Replies: 3
Views: 860
Posted By jccaclimber

Thermal images of an Aria drum brake

All these threads about brake temperatures got me curious and I decided to drag along the thermal camera on our ride today. This isn't terribly scientific, but does reinforce the "Yes, there's a lot...
06-09-21, 11:46 AM
Replies: 18
Views: 1,023
Posted By jccaclimber

Unlikely, but just to be sure, is the chain too...

Unlikely, but just to be sure, is the chain too worn to pass the tool rather than not worn enough? I have a Park CC3.2 (and a ruler). Every now and then I run into a chain so worn that the tip on...
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