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Search: Posts Made By: JohnDThompson
Showing results 1 to 50 of 1000
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Forum: Classic & Vintage
04-26-24, 03:59 PM
Replies: 26
Views: 576
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: Classic & Vintage
04-23-24, 02:48 PM
Replies: 8
Views: 289
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: 398
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...
Forum: Bicycle Mechanics
04-21-24, 10:00 AM
Replies: 49
Views: 25,798
Posted By JohnDThompson

"Newbie." Cut him some slack.

"Newbie."
Cut him some slack.
Forum: Bicycle Mechanics
04-19-24, 08:25 PM
Replies: 22
Views: 725
Posted By JohnDThompson

Actually, with the Dia-Compe G caliper, it's even...

Actually, with the Dia-Compe G caliper, it's even easier than that. There are flats on the pivot bolt that can accept a single thin wrench to center the caliper over the rim:...
Forum: General Cycling Discussion
04-18-24, 06:19 PM
Replies: 21
Views: 487
Posted By JohnDThompson

While that may be true, there are some grip-shift...

While that may be true, there are some grip-shift designs that make the process sufficiently tedious that it hardly seems worth the bother. My preferred fix is to replace the grip shifter with a...
Forum: Fifty Plus (50+)
04-16-24, 03:53 PM
Replies: 46
Views: 1,169
Posted By JohnDThompson

100/60 is considered a normal blood pressure....

100/60 is considered a normal blood pressure. Were you feeling symptomatic in any way (dizzy, malaise, nausea, etc.)? What was your pulse? Low blood pressure and high pulse rate after exertion could...
Forum: Bicycle Mechanics
04-12-24, 07:53 AM
Replies: 8
Views: 392
Posted By JohnDThompson

Seriously? The MF-62nn (Shimano 600) and MF-72nn...

Seriously? The MF-62nn (Shimano 600) and MF-72nn (Dura-Ace) freewheels were the first to get the Uniglide twisted tooth treatment, and IMO are among the best best freewheels ever put on the market.
...
Forum: Road Cycling
04-11-24, 11:05 AM
Replies: 44
Views: 1,844
Posted By JohnDThompson

Yes. I was Trek's warranty claim inspector in...

Yes. I was Trek's warranty claim inspector in Waterloo in the mid-80s; eduskator's comment is spot-on. If you raced on the frame, that would also exclude warranty coverage. But warranty claims are...
Forum: Bicycle Mechanics
04-10-24, 07:45 PM
Replies: 39
Views: 1,675
Posted By JohnDThompson

True, but as more and more sprockets were piled...

True, but as more and more sprockets were piled onto the rear cluster, and longer housing runs used to mount shifters on handlebars became more common, indexed shifting performance became...
Forum: Classic & Vintage
04-07-24, 06:54 AM
Replies: 11
Views: 545
Posted By JohnDThompson

Maybe "guidonnet" levers? ...

Maybe "guidonnet" levers?
https://cimg2.ibsrv.net/gimg/bikeforums.net-vbulletin/759x537/bars_854ed7adf1d11a947170ee27851f30ef2302fd0e.jpg
Forum: General Cycling Discussion
04-06-24, 06:06 PM
Replies: 182
Views: 6,846
Posted By JohnDThompson

Actually, you need a frame and fork designed to...

Actually, you need a frame and fork designed to handle disc brake loads, and hubs capable of mounting a brake rotor.




No. Machined brake tracks are a relatively modern feature. Unmachined...
Forum: General Cycling Discussion
04-01-24, 11:28 AM
Replies: 39
Views: 1,311
Posted By JohnDThompson

Have you tried a different SD card?

Have you tried a different SD card?
Forum: Classic & Vintage
03-31-24, 09:01 PM
Replies: 27,968
Views: 4,541,590
Posted By JohnDThompson

Not a "loaded tour," but I've done the Lake Pepin...

Not a "loaded tour," but I've done the Lake Pepin 3-Speed tour several times on my 1973 Raleigh Superbe. I usually set up camp in Wabesha, drive to Red Wing, ride from Red Wing to Wabesha, spend the...
Forum: Bicycle Mechanics
03-31-24, 09:00 AM
Replies: 26
Views: 890
Posted By JohnDThompson

I see no point in doing so. It would result in...

I see no point in doing so. It would result in the same problem as threading a track sprocket directly onto a freewheel hub: it will unthread itself if/when you resist the pedals to control speed.
Forum: General Cycling Discussion
03-31-24, 08:43 AM
Replies: 102
Views: 3,786
Posted By JohnDThompson

+1 this. And even if you are racing, UCI...

+1 this.

And even if you are racing, UCI imposes a minimum weight for bikes used in their sanctioned events.
Forum: Singlespeed & Fixed Gear
03-28-24, 05:46 PM
Replies: 5
Views: 494
Posted By JohnDThompson

I like the MKS "Fit α Sprint" straps. They're the...

I like the MKS "Fit α Sprint" straps. They're the closest thing to the old Alfredo Binda straps I've found. The strap is leather, with a plastic mesh laminated in to reduce stretching under load...
Forum: Classic & Vintage
03-28-24, 09:43 AM
Replies: 13
Views: 371
Posted By JohnDThompson

FWIW, Trek used a lot of Helicomatic hubs back in...

FWIW, Trek used a lot of Helicomatic hubs back in the 80s, and we installed Sedissport chains on them. Sachs bought out Sedis many years ago; one of their 7 or 8-speed chains ought to work on the...
Forum: Classic & Vintage
03-27-24, 12:17 PM
Replies: 2,622
Views: 674,760
Posted By JohnDThompson

Looks good; could be original and I just don't...

Looks good; could be original and I just don't recall that crown being used.
Forum: Bicycle Mechanics
03-26-24, 06:26 AM
Replies: 26
Views: 824
Posted By JohnDThompson

Often, removing the mounting bolt and riding...

Often, removing the mounting bolt and riding around the block a few times is enough to work the arm loose. Don't go too far from home/shop, as once it gets loose you'll want to stop riding and walk...
Forum: Singlespeed & Fixed Gear
03-22-24, 09:21 AM
Replies: 41
Views: 25,565
Posted By JohnDThompson

+1 this.

+1 this.
Forum: Classic and Vintage Sales
03-22-24, 09:11 AM
Replies: 13
Views: 695
Posted By JohnDThompson

IME, skewer springs are generic and completely...

IME, skewer springs are generic and completely interchangeable between hub brands.
Forum: Classic & Vintage
03-22-24, 09:03 AM
Replies: 41
Views: 1,639
Posted By JohnDThompson

From the original FB post: ...

From the original FB post:
https://cimg8.ibsrv.net/gimg/bikeforums.net-vbulletin/1076x684/hoods_e5abd2d51a8f250064712979da3c29352766a7e6.jpg...
Forum: Classic & Vintage
03-22-24, 08:49 AM
Replies: 83,260
Views: 14,163,807
Posted By JohnDThompson

FWIW, two of my friends worked for Masi...

FWIW, two of my friends worked for Masi California back in the mid-80s (Dave Tesch and Joe Starck), and they pronounced Masi as "Mazi."
Forum: Classic & Vintage
03-21-24, 12:25 PM
Replies: 41
Views: 1,639
Posted By JohnDThompson

Repo lever hoods source

This just popped up on the Facebook "Steel is Real" group. Looks like a good variety of models. No personal experience with them:
...
Forum: Classic & Vintage
03-21-24, 11:51 AM
Replies: 70
Views: 7,000
Posted By JohnDThompson

Lots of cool old city bikes still being used in...

Lots of cool old city bikes still being used in Italy. I spotted these in Cremona a few years back:...
Forum: Classic & Vintage
03-21-24, 11:33 AM
Replies: 83,260
Views: 14,163,807
Posted By JohnDThompson

They almost got it right. The final Cyrillic...

They almost got it right. The final Cyrillic character in the name should be the "backwards N" character, which the forum software doesn't allow.

Maybe it can be done as an image:...
Forum: Classic & Vintage
03-20-24, 07:41 PM
Replies: 18
Views: 646
Posted By JohnDThompson

H Lloyd Cycles in England also has a good...

H Lloyd Cycles in England also has a good selection:
https://hlloydcycles.com/en-us/collections
Forum: Classic & Vintage
03-20-24, 06:16 PM
Replies: 82
Views: 3,644
Posted By JohnDThompson

Campagnolo Triomphe is one of my favorites for a...

Campagnolo Triomphe is one of my favorites for a touring bike. They work equally well with slotted cleat bike shoes and shoe-soled street shoes....
Forum: Classic & Vintage
03-20-24, 09:23 AM
Replies: 82
Views: 3,644
Posted By JohnDThompson

Zeus 2000: titanium spindle, sealed bearings, and...

Zeus 2000: titanium spindle, sealed bearings, and titanium cage that is more durable than the aluminum cage used on many other pedals (including Campagnolo Super Record and Superleggero), and only...
Forum: Classic & Vintage
03-20-24, 07:39 AM
Replies: 44
Views: 1,504
Posted By JohnDThompson

Looks like "Tourney," which, IIRC was made by...

Looks like "Tourney," which, IIRC was made by Takagi, later acquired by Shimano.
Forum: Bicycle Mechanics
03-20-24, 07:16 AM
Replies: 32
Views: 1,063
Posted By JohnDThompson

I assume that when you write "races," you're...

I assume that when you write "races," you're referring to the cups. The reason the cones wear faster than the cup is because the bearing track on the cones is shorter than that of the cups, which...
Forum: General Cycling Discussion
03-20-24, 07:05 AM
Replies: 50
Views: 1,649
Posted By JohnDThompson

Keep in mind that unloaded performance is not a...

Keep in mind that unloaded performance is not a good predictor of loaded performance.
Forum: General Cycling Discussion
03-18-24, 07:51 AM
Replies: 41
Views: 1,450
Posted By JohnDThompson

My most complicated "cockpit." Thank goodness the...

My most complicated "cockpit." Thank goodness the bell is clearly labeled to avoid any confusion:...
Forum: Classic & Vintage
03-16-24, 08:17 PM
Replies: 24
Views: 1,037
Posted By JohnDThompson

I did most of those for the 750/950 series frames.

I did most of those for the 750/950 series frames.
Forum: General Cycling Discussion
03-16-24, 08:02 PM
Replies: 20
Views: 556
Posted By JohnDThompson

Still using my Kingsbridge gauge from the 70s: ...

Still using my Kingsbridge gauge from the 70s:
https://cimg1.ibsrv.net/gimg/bikeforums.net-vbulletin/604x427/kingsbridge_gauge_51f3aaca5bb4e578f5ead55be8180b64fac998d2.jpg
Forum: Bicycle Mechanics
03-13-24, 06:59 AM
Replies: 16
Views: 452
Posted By JohnDThompson

Grease is not ideal for lubricating freewheels,...

Grease is not ideal for lubricating freewheels, especially in cold climates. The viscosity of grease can prevent the pawls from seating fully (or at all), resulting in freewheeling in both...
Forum: Classic & Vintage
03-12-24, 06:06 PM
Replies: 22
Views: 3,957
Posted By JohnDThompson

Campagnolo bottom brackets can be … complicated....

Campagnolo bottom brackets can be … complicated. This document may help, and gives the offset and shoulder spacing measurements Mark asked about, above. It was printed before the C-Record era,...
Forum: General Cycling Discussion
03-11-24, 10:50 AM
Replies: 204
Views: 6,278
Posted By JohnDThompson

Their race; their rules.

Their race; their rules.
Forum: Classic & Vintage
03-10-24, 09:36 AM
Replies: 21,742
Views: 3,083,236
Posted By JohnDThompson

We have similar art. Neenah Foundry, one of the...

We have similar art. Neenah Foundry, one of the largest manufacturers of manhole covers, is a local company:...
Forum: Classic & Vintage
03-09-24, 02:30 PM
Replies: 11
Views: 396
Posted By JohnDThompson

Aelle was straight-gauge carbon-manganese tubing,...

Aelle was straight-gauge carbon-manganese tubing, just above Zeta in the product range:...
Forum: Classic & Vintage
03-07-24, 08:42 AM
Replies: 3,247
Views: 419,162
Posted By JohnDThompson

Here's one option: ...

Here's one option:
https://m.media-amazon.com/images/I/61uiACY7ACL._SL1500_.jpg
https://www.amazon.com/Liquid-Latex-Professional-Special-Translucent/dp/B01MYNF067/ref=sr_1_18?sr=8-18
Forum: Classic & Vintage
03-05-24, 11:54 AM
Replies: 16
Views: 976
Posted By JohnDThompson

It's for holding the pawls when you assemble the...

It's for holding the pawls when you assemble the body.
https://cimg1.ibsrv.net/gimg/bikeforums.net-vbulletin/918x645/campy_fw_pawl_tool_64be47bcd26f3316907f19fdd7ea070e235020a9.jpg
Forum: Singlespeed & Fixed Gear
02-29-24, 10:03 AM
Replies: 11
Views: 712
Posted By JohnDThompson

Like this: ...

Like this:
https://i2.wp.com/cdn.makezine.com/uploads/2010/09/rebar_bike_01.jpg
Forum: Road Cycling
02-29-24, 09:59 AM
Replies: 58
Views: 2,161
Posted By JohnDThompson

It's only "dumb" if you don't enjoy riding...

It's only "dumb" if you don't enjoy riding it.
Forum: Bicycle Mechanics
02-29-24, 09:29 AM
Replies: 43
Views: 1,318
Posted By JohnDThompson

Ok, but that saddle is pretty obviously broken. I...

Ok, but that saddle is pretty obviously broken. I also like to fix and reuse things whenever possible, but there is a point of diminishing returns, and that saddle looks well past it.
Forum: Bicycle Mechanics
02-28-24, 02:44 PM
Replies: 123
Views: 4,221
Posted By JohnDThompson

In most cases, yes. The charity shop where I...

In most cases, yes. The charity shop where I volunteer is part of an urban farm. We don't have a budget for new tubes (we rely totally on donations), so we patch tubes whenever possible. When it is...
Forum: Classic & Vintage
02-26-24, 08:01 AM
Replies: 16
Views: 574
Posted By JohnDThompson

It does look original, except for rims and tires....

It does look original, except for rims and tires. Here's a spec sheet from BITD:
https://cimg4.ibsrv.net/gimg/bikeforums.net-vbulletin/722x1068/ata_lstl_cb21c77b1995dc299ed721de5a7bd23302ddb05b.jpg
Forum: General Cycling Discussion
02-25-24, 11:19 AM
Replies: 47
Views: 1,515
Posted By JohnDThompson

Chain length depends on your specific gear range...

Chain length depends on your specific gear range and chainstay length. If you have the old chain, trim the new chain to match. Otherwise, this may help:...
Forum: Classic & Vintage
02-24-24, 11:00 AM
Replies: 17
Views: 795
Posted By JohnDThompson

IME, the issue with freewheels having more than...

IME, the issue with freewheels having more than seven sprockets is not the strength of the freewheel, but a propensity to axle breakage due to the longer unsupported length of axle needed to provide...
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