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Search: Posts Made By: JohnDThompson
Showing results 1 to 50 of 1000
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Forum: Bicycle Mechanics
05-14-24, 08:55 PM
Replies: 30
Views: 684
Posted By JohnDThompson

Both use standard English thread: 1.370 x 24 tpi

Both use standard English thread: 1.370 x 24 tpi
Forum: General Cycling Discussion
05-14-24, 08:52 PM
Replies: 109
Views: 2,781
Posted By JohnDThompson

It's trickier with non-removeable valve cores,...

It's trickier with non-removeable valve cores, but still possible.
Forum: General Cycling Discussion
05-14-24, 06:39 AM
Replies: 109
Views: 2,781
Posted By JohnDThompson

Most of the time, yes. Big holes still require...

Most of the time, yes. Big holes still require tube patch or replacement.
Forum: Bicycle Mechanics
05-14-24, 06:35 AM
Replies: 30
Views: 684
Posted By JohnDThompson

Indeed. If/when the retaining ring on the...

Indeed. If/when the retaining ring on the self-extractor breaks (it happens), no special tool is needed to remove Shimano crank arms.


Except for the Swiss, anyway. And RH thread fixed cups can...
Forum: Bicycle Mechanics
05-13-24, 08:23 PM
Replies: 30
Views: 684
Posted By JohnDThompson

I suspect that Campagnolo was suffering from "Not...

I suspect that Campagnolo was suffering from "Not Invented Here" syndrome.
Forum: General Cycling Discussion
05-13-24, 08:16 PM
Replies: 109
Views: 2,781
Posted By JohnDThompson

Well enough for me to still be using it after ten...

Well enough for me to still be using it after ten years.
Forum: General Cycling Discussion
05-13-24, 08:13 PM
Replies: 109
Views: 2,781
Posted By JohnDThompson

FWIW, I use "Stan's."

FWIW, I use "Stan's."
Forum: General Cycling Discussion
05-13-24, 11:28 AM
Replies: 109
Views: 2,781
Posted By JohnDThompson

I assume this was directed at me, regarding use...

I assume this was directed at me, regarding use of sealant in tubes. If so, the answer is "yes." I've been using sealant in tubes on three bikes for over ten years.
Forum: General Cycling Discussion
05-13-24, 09:58 AM
Replies: 109
Views: 2,781
Posted By JohnDThompson

Sure, but the OP's anecdote states that he...

Sure, but the OP's anecdote states that he couldn't find the puncture site to plug that way.
Forum: General Cycling Discussion
05-13-24, 07:51 AM
Replies: 109
Views: 2,781
Posted By JohnDThompson

It seems more a testimonial for sealant than for...

It seems more a testimonial for sealant than for tubeless. You can use sealant in tubes, you know.
Forum: Singlespeed & Fixed Gear
05-11-24, 02:51 PM
Replies: 4
Views: 285
Posted By JohnDThompson

Peter White carrys 5-pin TA rings that will mount...

Peter White carrys 5-pin TA rings that will mount on the Stronglight 49D crank. They're "outer" rings, 3/32" width, for the Pro-5 "Cyclotouriste" crank, but as noted above, they will work with 1/8"...
Forum: Classic & Vintage
05-11-24, 12:33 PM
Replies: 160
Views: 26,248
Posted By JohnDThompson

Maybe the Gipiemme "Crono Sprint" retrofriction...

Maybe the Gipiemme "Crono Sprint" retrofriction levers? These were apparently made for Gipiemme by Simplex.
https://velobase.com/CompImages/Shifter/CD433D74-6C20-4624-8586-14A5CFF31F11.jpeg...
Forum: Classic & Vintage
05-11-24, 12:27 PM
Replies: 12
Views: 431
Posted By JohnDThompson

Here's some you don't often see. Zeus "Cosmos"...

Here's some you don't often see. Zeus "Cosmos" retrofriction shift levers:...
Forum: Bicycle Mechanics
05-11-24, 12:20 PM
Replies: 15
Views: 266
Posted By JohnDThompson

There can be size variations in manufacturing...

There can be size variations in manufacturing both frame tubing and components; perhaps your seat tube is on the small side of acceptable inside diameter, while the post on the large side of...
Forum: Classic & Vintage
05-10-24, 07:15 PM
Replies: 10
Views: 557
Posted By JohnDThompson

Yellow Jersey's "Servizio Corse" are still a...

Yellow Jersey's "Servizio Corse" are still a pretty good deal at $85 for three tires (used to be $50 for three). My experience is that they are straight and round, and measure 21mm wide....
Forum: Bicycle Mechanics
05-10-24, 06:16 PM
Replies: 35
Views: 736
Posted By JohnDThompson

Yes, I just had that happen last week. ...

Yes, I just had that happen last week.


Pull out the valve core, squirt some sealant into the tube, reinstall the core, install the tube and tire on the wheel, pump it up and ride it around a...
Forum: Singlespeed & Fixed Gear
05-09-24, 09:12 AM
Replies: 4
Views: 285
Posted By JohnDThompson

Not in my experience. 1/8" chain runs fine on...

Not in my experience. 1/8" chain runs fine on both 1/8" and 3/32" drivetrain components, allowing you to mix and match as needed. TA did make track chainrings for 1/8" chain that can mount on the 49D...
Forum: Classic & Vintage
05-09-24, 08:54 AM
Replies: 26
Views: 783
Posted By JohnDThompson

One could probably cobble up a functional...

One could probably cobble up a functional equivalent to the Blackburn adaptor with a couple bolts, nuts, and washers and a thick rubber washer or section of wine cork with a hole for the bolt, to...
Forum: Classic & Vintage
05-07-24, 03:13 PM
Replies: 19
Views: 482
Posted By JohnDThompson

Specifically, the "diver's helmet" type chainstay...

Specifically, the "diver's helmet" type chainstay cable stop uses the stepped ferrule:...
Forum: Classic & Vintage
05-07-24, 03:03 PM
Replies: 4
Views: 456
Posted By JohnDThompson

I see images from the old VAR catalog scan I did...

I see images from the old VAR catalog scan I did for Sheldon Brown all over the place.
Forum: Classic & Vintage
05-06-24, 09:52 AM
Replies: 6
Views: 266
Posted By JohnDThompson

Late production "Record" shifters. ...

Late production "Record" shifters.
https://cimg5.ibsrv.net/gimg/bikeforums.net-vbulletin/956x768/record_shifters_aac83c43f57bd1b2d3a018e1e3ecf8aa1d935b28.jpg
Forum: Classic & Vintage
05-05-24, 08:37 PM
Replies: 21,817
Views: 3,150,020
Posted By JohnDThompson

The crank is Stronglight 93. Not sure about the...

The crank is Stronglight 93. Not sure about the frame, but it appears to have Zeus pista dropouts.
Forum: Classic & Vintage
05-05-24, 09:41 AM
Replies: 138
Views: 5,406
Posted By JohnDThompson

Yes, or removing track sprockets from hubs. Two...

Yes, or removing track sprockets from hubs. Two different radii, to accommodate different sprocket tooth counts.
Forum: Classic & Vintage
05-05-24, 09:39 AM
Replies: 138
Views: 5,406
Posted By JohnDThompson

Yes, and the fact that it is marked "Cholain #2"...

Yes, and the fact that it is marked "Cholain #2" implies that there should be a "Cholain #1" as well, but I've never seen one. I've seen plenty of the #2s (I even have one on my tool board), but...
Forum: Bicycle Mechanics
05-05-24, 09:34 AM
Replies: 89
Views: 2,917
Posted By JohnDThompson

Or a wad of tarry gravel. While it may not lock...

Or a wad of tarry gravel. While it may not lock up the wheel completely, it can still be enough to launch a face-plant.
Forum: Singlespeed & Fixed Gear
05-04-24, 07:49 PM
Replies: 4
Views: 250
Posted By JohnDThompson

Or, to have a different gear ratio on each side....

Or, to have a different gear ratio on each side. The length of your dropout slot will determine how much the sprocket tooth count can differ while still allowing appropriate chain tension....
Forum: Classic & Vintage
05-04-24, 06:24 PM
Replies: 28,018
Views: 4,587,319
Posted By JohnDThompson

The original AW hub had a neutral space between...

The original AW hub had a neutral space between 2nd and 3rd gear that could happen when the shift cable went out of adjustment. In the 1980s, Columbia Bicycle Company persuaded Sturmey-Archer to...
Forum: General Cycling Discussion
05-04-24, 06:15 PM
Replies: 7
Views: 349
Posted By JohnDThompson

Leaving the seat tube open to rain, cigarette...

Leaving the seat tube open to rain, cigarette butts, etc.


My commuter bike, with a short piece of chain securing the saddle to the frame:...
Forum: General Cycling Discussion
05-04-24, 07:09 AM
Replies: 7
Views: 349
Posted By JohnDThompson

It's just as safe as putting an aluminum post in...

It's just as safe as putting an aluminum post in a steel frame. Be sure to use grease or ant-seize in both situations, to prevent electrolytic galling.


Pros: easy adjustment
Cons: easy theft
Forum: Classic & Vintage
05-03-24, 07:39 AM
Replies: 138
Views: 5,406
Posted By JohnDThompson

Yes: ...

Yes:
https://cimg2.ibsrv.net/gimg/bikeforums.net-vbulletin/778x1099/gran_sport_shifter_945ffa1f978071444ed4f920828d6091da2d5656.jpg
Forum: General Cycling Discussion
05-03-24, 07:15 AM
Replies: 112
Views: 4,754
Posted By JohnDThompson

Same here. And make the oblivious aware...

Same here.


And make the oblivious aware of your presence.
https://m.media-amazon.com/images/I/51JJvRPMW4L._AC_SL1500_.jpg
Forum: Classic & Vintage
05-02-24, 09:27 PM
Replies: 6
Views: 326
Posted By JohnDThompson

All three iterations of the Lambert/Viscount cast...

All three iterations of the Lambert/Viscount cast aluminum fork were subject to CPSC recall. Best to replace it with a steel fork. FWIW, when I compered, the Lambert/Viscount cast aluminum fork is...
Forum: Bicycle Mechanics
05-02-24, 02:47 PM
Replies: 89
Views: 2,917
Posted By JohnDThompson

Upside-down "drop bolt?" I'd be concerned in...

Upside-down "drop bolt?"

I'd be concerned in running with clearance that tight on the front wheel. Something that sticks to the tire could jam under the caliper and lock up the wheel, causing a...
Forum: Classic & Vintage
05-01-24, 12:50 PM
Replies: 628
Views: 33,891
Posted By JohnDThompson

No braze-on cable guides at the bottom bracket...

No braze-on cable guides at the bottom bracket and long-slot Campagnolo 1010A dropouts suggests the frame is 70s production before such braze-ons became standard....
Forum: Classic & Vintage
05-01-24, 12:45 PM
Replies: 17
Views: 644
Posted By JohnDThompson

Not to mention US wire gauges for spokes use...

Not to mention US wire gauges for spokes use smaller numbers for thicker spokes, while French spoke gauges us larger numbers for thicker spokes, and the numbers cross over right in the thicknesses...
Forum: Classic & Vintage
05-01-24, 06:24 AM
Replies: 44
Views: 1,240
Posted By JohnDThompson

The original Super Record Headset came with a...

The original Super Record Headset came with a thin steel spacer; later, it was changed to the thicker aluminum spacer to hold the #712/3 "Spacing spring for headset tool," to help prevent headset...
Forum: Singlespeed & Fixed Gear
04-30-24, 11:01 AM
Replies: 4
Views: 284
Posted By JohnDThompson

I use 1/8" chain. It has the benefit of being...

I use 1/8" chain. It has the benefit of being compatible with chainrings and sprockets for either 3/32" or 1/8" chain.
Forum: Classic & Vintage
04-30-24, 10:00 AM
Replies: 44
Views: 1,240
Posted By JohnDThompson

As @Moe Zhoost...

As @Moe Zhoost (https://www.bikeforums.net/members/moe-zhoost-423003.html) pointed out, make sure you have the proper size balls installed. A Super Record headset uses 22 3/16" balls in each race....
Forum: Bicycle Mechanics
04-30-24, 09:35 AM
Replies: 13
Views: 429
Posted By JohnDThompson

It should have been done before the headset was...

It should have been done before the headset was installed, but if your headset shows signs of needing it (unable to adjust without binding and/or slop), it may benefit from having it done. The proper...
Forum: Classic & Vintage
04-30-24, 09:01 AM
Replies: 12
Views: 649
Posted By JohnDThompson

Let me rephrase my comment. The OEM derailleur on...

Let me rephrase my comment. The OEM derailleur on the Fuji "Finest" model bike was the SunTour-V, not the V-GT.
Forum: Classic & Vintage
04-28-24, 08:02 AM
Replies: 13
Views: 617
Posted By JohnDThompson

It's likely a mismatch between new chain and worn...

It's likely a mismatch between new chain and worn sprocket. If the wheel is original to the bike, it will have a freewheel, not a modern freehub/cassette, and probably only five sprockets. Individual...
Forum: Bicycle Mechanics
04-28-24, 07:41 AM
Replies: 18
Views: 531
Posted By JohnDThompson

When the casing starts to separate from the bead,...

When the casing starts to separate from the bead, it's only a matter of time before it turns into a blow-out. Time for a new tire.
Forum: Classic & Vintage
04-26-24, 04:57 PM
Replies: 14
Views: 575
Posted By JohnDThompson

That's essentially what the Tange "RollerDrive"...

That's essentially what the Tange "RollerDrive" headset is: cylindrical rollers on the bottom race for load handling, balls on the upper race since the upper race only serves to maintain alignment,...
Forum: Classic & Vintage
04-26-24, 04:51 PM
Replies: 14
Views: 575
Posted By JohnDThompson

Are you referring to the fretting damage that...

Are you referring to the fretting damage that leads to "indexed steering?" My experience is the opposite: ball bearing headsets suffer fretting damage much more readily than roller bearing headsets....
Forum: Classic & Vintage
04-26-24, 03:59 PM
Replies: 31
Views: 1,423
Posted By JohnDThompson

IIRC, the Sports Tourer also used a non-standard...

IIRC, the Sports Tourer also used a non-standard headset head tube fittings (also found on some BMX headsets); 32.7mm rather than 30.2mm (ISO) or 30.0mm (JIS).
Forum: Bicycle Mechanics
04-26-24, 03:23 PM
Replies: 19
Views: 597
Posted By JohnDThompson

Do you mean "freewheel with an 8-sprocket...

Do you mean "freewheel with an 8-sprocket cluster?" "Freewheel" and "cassette" are mutually exclusive possibilities. One or the other; not both.

Can you post a close-up picture of the rear...
Forum: General Cycling Discussion
04-25-24, 05:29 PM
Replies: 5
Views: 347
Posted By JohnDThompson

IIRC, the Park FR-7 works on those.

IIRC, the Park FR-7 works on those.
Forum: Classic & Vintage
04-25-24, 05:19 PM
Replies: 14
Views: 575
Posted By JohnDThompson

Yes, that's why I referred to the Stronglight and...

Yes, that's why I referred to the Stronglight and Tange rollers as "cylindrical rollers."


It makes a small difference. The difference in track radius from the inner end of a cylindrical roller...
Forum: Classic & Vintage
04-23-24, 02:48 PM
Replies: 8
Views: 396
Posted By JohnDThompson

It doesn't look French to me; more like a...

It doesn't look French to me; more like a bike-boom era Japanese bike. Have you checked the bottom bracket cups and/or steer tube for English versus metric thread? The MAFAC brakes are incongruous...
Forum: Classic & Vintage
04-23-24, 02:42 PM
Replies: 14
Views: 575
Posted By JohnDThompson

Tapered roller bearings combine high...

Tapered roller bearings combine high load-handling with low friction, but are pretty fussy about alignment. Cylindrical roller bearing like used in the Stronglight A9 and Tange RollerDrive have...
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