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Search: Posts Made By: JohnDThompson
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08-13-22, 03:35 PM
Replies: 3
Views: 84
Posted By JohnDThompson

On a brakeless track bike, there's no compelling...

On a brakeless track bike, there's no compelling reason to remove glue from the rim sidewalls. Dave Tesch used to glory in this, smearing mass quantities Clément red rim cement with little regard for...
08-13-22, 03:31 PM
Replies: 8
Views: 163
Posted By JohnDThompson

Pedal/wheel overlap, as Crankycrank suggests, is...

Pedal/wheel overlap, as Crankycrank suggests, is not uncommon, but is only an issue with very sharp turns at very low speed. Front-end damage, as cxwrench suggests, is also a possibility. Look for...
08-13-22, 03:25 PM
Replies: 6
Views: 110
Posted By JohnDThompson

Have you checked hanger alignment? Friction in...

Have you checked hanger alignment? Friction in the cables/housing? Gunk in the shift levers and/or derailleur?
08-13-22, 08:50 AM
Replies: 23
Views: 461
Posted By JohnDThompson

Or any slotted cleats, for that matter. If...

Or any slotted cleats, for that matter.

If you can print metal parts, tabbed washers to mount Huret derailleurs onto Campagnolo-type dropouts.
08-13-22, 07:11 AM
Replies: 17
Views: 226
Posted By JohnDThompson

Hard to tell. How does it line up in the bike?

Hard to tell. How does it line up in the bike?
08-13-22, 06:51 AM
Replies: 17
Views: 226
Posted By JohnDThompson

No, the two smallest sprockets are threaded,...

No, the two smallest sprockets are threaded, while the larger three sprockets are splined.

A single freewheel would work, but AFAIK only White Industries offers a 17t option, and those aren't...
08-13-22, 06:41 AM
Replies: 17
Views: 226
Posted By JohnDThompson

The OEM crank on the S-10-S was a Sugino Maxy,...

The OEM crank on the S-10-S was a Sugino Maxy, the bottom bracket for which used a stud-type axle and nine 1/4" balls in a retainer for each race. But as you point out, eleven balls will fit, either...
08-13-22, 06:34 AM
Replies: 16
Views: 319
Posted By JohnDThompson

The stupidest thing I've had to say to a...

The stupidest thing I've had to say to a motorist?

"Why are you driving on the bike path? There's a sign right there that says 'NO MOTOR VEHICLES ALLOWED'"
08-11-22, 08:57 PM
Replies: 13
Views: 361
Posted By JohnDThompson

Antiseize for places where dissimilar metals pose...

Antiseize for places where dissimilar metals pose a risk for galling or galvanic corrosion, e.g. aluminum on steel. Otherwise, grease is sufficient, and less messy.
08-11-22, 09:05 AM
Replies: 7
Views: 177
Posted By JohnDThompson

Most BB cartridges aren't intended to be...

Most BB cartridges aren't intended to be serviceable, but many can be, given sufficient patience and determination. Given the cost of a new replacement cartridge, it's hard to make the case for...
08-11-22, 08:43 AM
Replies: 41
Views: 1,009
Posted By JohnDThompson

Unless you provide the labor to rebuild the wheel...

Unless you provide the labor to rebuild the wheel around a new hub, I suspect the cost of replacing the entire wheel would be comparable to that of paying a wheel builder to rebuild the wheel for you.
08-08-22, 07:08 AM
Replies: 16
Views: 308
Posted By JohnDThompson

An oil port and "globe" logo would indicate a...

An oil port and "globe" logo would indicate a Record hub.



Until the late 1970s, Campagnolo indicated thread spec with the presence or absence of a groove inscribed between the freewheel...
08-07-22, 06:38 PM
Replies: 20
Views: 494
Posted By JohnDThompson

...

...
08-07-22, 06:30 PM
Replies: 8
Views: 245
Posted By JohnDThompson

I agree with dddd; the Super Sport. The frame is...

I agree with dddd; the Super Sport. The frame is straight-gauge seamless Chrome-Moly tubing, fillet brazed by hand, rather than "electroforged" like the Varsity and Continental models. The bottom...
08-07-22, 06:12 PM
Replies: 20
Views: 519
Posted By JohnDThompson

That's what happens with too long a spindle. If...

That's what happens with too long a spindle. If the spindle is too short, the chainring will scrape on the chainstay, and/or the crank arm will drag on the bottom bracket cup.
08-07-22, 06:09 PM
Replies: 18
Views: 357
Posted By JohnDThompson

The "wobble" could be in either the pedal...

The "wobble" could be in either the pedal bearings or the bottom bracket bearings. If you can wiggle the crank arms directly, it's the bottom bracket. If you hold the crank arm steady and can wiggle...
08-07-22, 06:04 PM
Replies: 7
Views: 243
Posted By JohnDThompson

An eleven ball retainer installs with the open...

An eleven ball retainer installs with the open face facing inward; a nine ball retainer installs with the open face facing outward.
08-07-22, 05:47 PM
Replies: 44
Views: 768
Posted By JohnDThompson

Not a squirrel story, but I had a frog jump into...

Not a squirrel story, but I had a frog jump into my front wheel once. It landed inside the spokes, went around a few rotations, and then was flung out against my leg. It dropped to the road and I saw...
08-07-22, 05:37 PM
Replies: 7
Views: 151
Posted By JohnDThompson

As Andrew said, most follow the Campanolo pattern...

As Andrew said, most follow the Campanolo pattern of a curved tab with slot in it, into which the derailleur mounts. The slot allows some verical adjustment to accommodate different chainring sizes,...
08-07-22, 07:10 AM
Replies: 7
Views: 151
Posted By JohnDThompson

Not without significant modification of the...

Not without significant modification of the derailleur. It's much easier and likely to perform better if you buy a derailleur designed to work on your frame's derailleur mount.
08-05-22, 06:15 AM
Replies: 12
Views: 262
Posted By JohnDThompson

The Helicomatic Museum...

The Helicomatic Museum (https://www.borgercompagnie.com/helicomatic/index.html) is the best place for information about these hubs.
08-04-22, 09:07 PM
Replies: 11
Views: 381
Posted By JohnDThompson

You shouldn't need to drill any hole. Claws mount...

You shouldn't need to drill any hole. Claws mount into the dropout slot:
Forum: Framebuilders
08-04-22, 09:01 PM
Replies: 7
Views: 335
Posted By JohnDThompson

Lugless allows for more freedom in frame...

Lugless allows for more freedom in frame geometry, as the builder is not confined by what the lugs allow. Lugs allow for some artistic expression in the tubing joints, within the geometric limits of...
08-04-22, 08:57 PM
Replies: 11
Views: 381
Posted By JohnDThompson

"Claw" generally refers to a bolt-on piece onto...

"Claw" generally refers to a bolt-on piece onto which the derailleur mounts, "hanger" generally refers to an integral part of the dropout onto which the derailleur mounts.
08-04-22, 08:37 PM
Replies: 22
Views: 3,044
Posted By JohnDThompson

I assume you mean on an athletic heart rate...

I assume you mean on an athletic heart rate monitor. On an EKG or four-lead telemetry monitor they are distinct. SVT has a narrow QRS interval, indicative of source above the ventricle. V-tach has a...
08-04-22, 08:20 PM
Replies: 4
Views: 154
Posted By JohnDThompson

The Dia-Compe "Silver" downtube shift lever is...

The Dia-Compe "Silver" downtube shift lever is probably the closest you can get to a SunTour ratcheting shift lever for braze-on mounts:


SILVER W-SHIFT LEVER | Diacompe...
08-04-22, 08:03 PM
Replies: 11
Views: 381
Posted By JohnDThompson

Why not just get a claw to mount the derailleur?...

Why not just get a claw to mount the derailleur? Is there something unusual about either the dropout or the derailleur that precludes this?
08-02-22, 06:56 PM
Replies: 21
Views: 661
Posted By JohnDThompson

I haven't seen anything that dramatic, but I have...

I haven't seen anything that dramatic, but I have worked as an RN in inpatient rehab, where we routinely got traumatic brain injury patients from motorcycle and snowmobile accidents. That was enough...
08-02-22, 06:49 PM
Replies: 15
Views: 437
Posted By JohnDThompson

We made some like that at Trek, for salespeople...

We made some like that at Trek, for salespeople to carry around and show off the Trek socketed dropouts and investment cast bottom bracket shells and lugs before the actual bikes were available.
08-02-22, 06:17 PM
Replies: 35
Views: 664
Posted By JohnDThompson

The Experimental Aircraft people have a...

The Experimental Aircraft people have a rule-of-thumb that in order to prevent eventual fraying of a control cable, any pulley/guide/direction change on a cable should have a radius at least 50...
08-02-22, 06:07 PM
Replies: 22
Views: 539
Posted By JohnDThompson

Have you tried "OSMAnd" (OpenStreetMaps for...

Have you tried "OSMAnd" (OpenStreetMaps for Android)? It doesn't need a phone/data connection, instead using offline maps from OpenStreetMaps:
...
08-02-22, 06:58 AM
Replies: 28
Views: 690
Posted By JohnDThompson

The Shimano TL-FW10 is the preferred tool for...

The Shimano TL-FW10 is the preferred tool for this. The Bicycle Research CT-1 is also good. Both have been out of production for years, but can be found on the use market, if you're patient.
08-02-22, 06:38 AM
Replies: 9
Views: 263
Posted By JohnDThompson

The Bicycle Research CT-1 also has the...

The Bicycle Research CT-1 also has the stabilizing ring like the TL-FW10. Also out of production, but can be found on the used market if you're patient.



Bicycle Research made an affordable...
08-02-22, 06:24 AM
Replies: 7
Views: 291
Posted By JohnDThompson

Triomphe, Victory, and Chorus hubs were all...

Triomphe, Victory, and Chorus hubs were all derived from Gran Sport (aka Nuovo Tipo) and share the same axles, cones, and cups. The differences are the finish and the skewers.
08-01-22, 11:15 AM
Replies: 28
Views: 532
Posted By JohnDThompson

Try using a bead jack rather than tire levers....

Try using a bead jack rather than tire levers. And once mounted, inflate partially and check that the inner tube isn't stuck under the tire bead, where it can extrude and burst under full pressure....
08-01-22, 10:57 AM
Replies: 3
Views: 219
Posted By JohnDThompson

It's not a Trek; Trek never used those lugs, seat...

It's not a Trek; Trek never used those lugs, seat stay ends like that, the square chainstay bridge, or tube-type under-the-bottom-bracket cable guides. The stud-type bottle cage mounts are likely an...
08-01-22, 06:01 AM
Replies: 8
Views: 394
Posted By JohnDThompson

It wasn't a single machine, it was a series of...

It wasn't a single machine, it was a series of machines, each dedicated to a specific joint. Fixturing for each machine was size and model specific, which would limit custom geometries.
Forum: Road Cycling
07-31-22, 06:40 PM
Replies: 11
Views: 278
Posted By JohnDThompson

BITD, we'd just stick our shoes in a plastic...

BITD, we'd just stick our shoes in a plastic bread bag. For clipless systems, you'd likely need to cut a hole for the cleat (toeclips and slotted cleats don't necessarily need this).
07-31-22, 06:34 PM
Replies: 15
Views: 250
Posted By JohnDThompson

Another option would be to route the rear...

Another option would be to route the rear derailleur cable under the bottom bracket. There are plastic cable guides you can attach to the bottom bracket for this. Most use a bolt to hold it in place,...
07-31-22, 06:22 PM
Replies: 15
Views: 250
Posted By JohnDThompson

He can't go much lower without the tail of the...

He can't go much lower without the tail of the derailleur cage snagging on the rear derailleur cable:
...
07-31-22, 06:17 PM
Replies: 120
Views: 3,079
Posted By JohnDThompson

Nobody said i would be easy. :) You could...

Nobody said i would be easy. :)

You could use spacers to position the bolt in the necessary orientation. It would take some trial and error, but should work. A nit-picker might measure the...
07-31-22, 06:12 PM
Replies: 5,235
Views: 600,263
Posted By JohnDThompson

Household ammonia solution will dissolve gum...

Household ammonia solution will dissolve gum rubber. Might be quicker than scraping, if you can stand the smell. Maybe drop the levers in a sealed bucket with ammonia for a while and see what's left...
07-31-22, 06:03 PM
Replies: 3
Views: 219
Posted By JohnDThompson

I don't know who built it, but it looks cleanly...

I don't know who built it, but it looks cleanly done. I suspect that the fork is not original to the frame: the stay/blade end treatments are different, as are the dropouts (front is Campagnolo, rear...
07-31-22, 05:59 PM
Replies: 120
Views: 3,079
Posted By JohnDThompson

I suspect that there are threaded pieces brazed...

I suspect that there are threaded pieces brazed into the brake bridge and fork crown (like water bottle mounts) into which the pivot bolts thread.
07-31-22, 05:08 PM
Replies: 23
Views: 547
Posted By JohnDThompson

Unless the tool is hardened steel, I'm skeptical...

Unless the tool is hardened steel, I'm skeptical that it will work. Since you're already fabricating it, go ahead and try. The tool is more likely to fail than it is to damage the hardened steel...
07-31-22, 04:52 PM
Replies: 67
Views: 1,608
Posted By JohnDThompson

The grime can be abrasive, and accelerate wear of...

The grime can be abrasive, and accelerate wear of drivetrain components, particularly soft aluminum chainrings.
07-31-22, 04:46 PM
Replies: 14
Views: 391
Posted By JohnDThompson

Because only the outermost threads are damaged....

Because only the outermost threads are damaged. Once the freewheel is installed, the undamaged threads are covered by the freewheel body, and the lockring can't engage them.
07-31-22, 04:40 PM
Replies: 23
Views: 594
Posted By JohnDThompson

The larger radius of the open-cam design has less...

The larger radius of the open-cam design has less mechanical advantage than the traditional enclosed-cam design. The wheel can't shift out of position in a vertical dropout, so less mechanical...
07-30-22, 05:42 AM
Replies: 5
Views: 185
Posted By JohnDThompson

I suspect that the upper pivot spring is either...

I suspect that the upper pivot spring is either disengaged or broken. If that is the case, consider replacing the derailleur.
07-30-22, 05:34 AM
Replies: 14
Views: 391
Posted By JohnDThompson

It looks like the outermost lockring threads on...

It looks like the outermost lockring threads on the hub are worn away, leaving only the innermost threads to engage the lockring. When the freewheel is installed, the lockring cannot thread far...
Showing results 1 to 50 of 1000
 


 
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