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Search: Posts Made By: JohnDThompson
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09-18-20, 12:11 PM
Replies: 31
Views: 415
Posted By JohnDThompson

I've successfully reamed and tapped Italian...

I've successfully reamed and tapped Italian threads into several Viscount frames. Check your local shops; one may have the Bicycle Research reamer/tap set to do this job.
09-17-20, 07:13 AM
Replies: 7
Views: 225
Posted By JohnDThompson

Seems like a lot of work for something that isn't...

Seems like a lot of work for something that isn't that expensive off the shelf. Unless they're hardened, I suspect they won't last too long in use.
09-16-20, 07:49 PM
Replies: 17
Views: 344
Posted By JohnDThompson

First generation Deore was the so-called "Deer...

First generation Deore was the so-called "Deer Head" group in 1981, and wasn't designed for indexed shifting.
...
09-16-20, 07:35 AM
Replies: 27
Views: 58,929
Posted By JohnDThompson

Zombie thread, but what the heck. Reynolds...

Zombie thread, but what the heck.

Reynolds 501 is a seamed, cold drawn, Chrome-Moly tube.

Reynolds 531 is a seamless, manganese molybdenum tube.
09-16-20, 07:29 AM
Replies: 12
Views: 280
Posted By JohnDThompson

Dura Ace PD7400 Zeus 2000 SunTour Superbe Pro...

Dura Ace PD7400
Zeus 2000
SunTour Superbe Pro
Lyotard mod. 23 "Marcel Berthet"
09-14-20, 07:45 PM
Replies: 21
Views: 491
Posted By JohnDThompson

No need to remove freewheel from the hub or the...

No need to remove freewheel from the hub or the sprockets from the freewheel body to clean them. Use a strip of cloth soaked in mineral spirits to "floss" between the sprockets to remove grime.
09-13-20, 08:20 PM
Replies: 67
Views: 1,546
Posted By JohnDThompson

I couldn't get the link you provided to open, but...

I couldn't get the link you provided to open, but using Google Scholar, I did find what is apparently a pdf version of the study here:

http://www.bicyclinglife.com/Library/Accident-Study.pdf
09-07-20, 05:44 PM
Replies: 23
Views: 352
Posted By JohnDThompson

Yes, a narrower tire would prevent that. ...

Yes, a narrower tire would prevent that.

N.B. I notice that your caliper release lever is in the "open" position:
...
09-06-20, 08:57 AM
Replies: 28
Views: 752
Posted By JohnDThompson

They are a close copy of Campagnolo's Record...

They are a close copy of Campagnolo's Record pedals. The only closer copy is the KKT Pro-Ace.

I have a set of MKS Unique track pedals, con denti. They don't have a model designation:
09-06-20, 08:29 AM
Replies: 13
Views: 660
Posted By JohnDThompson

Not really. The hanger stop is in the wrong place...

Not really. The hanger stop is in the wrong place for most Campagnolo derailleurs. It will work with a Campagnolo Gran Turismo derailleur, though. :innocent:



It needs the relief on the hanger...
09-06-20, 07:49 AM
Replies: 13
Views: 660
Posted By JohnDThompson

Schwinn modified the Huret dropouts they use to...

Schwinn modified the Huret dropouts they use to work better with the LeTour-branded Shimano Crane GS derailleur:
09-05-20, 05:29 AM
Replies: 13
Views: 328
Posted By JohnDThompson

Yes, you're right. My bad. :( The best...

Yes, you're right. My bad. :(

The best course of action is to ignore all the archaic ABC and inch size designations and instead rely on the ETRTO/ISO size designations.
09-05-20, 05:09 AM
Replies: 7
Views: 270
Posted By JohnDThompson

Early English thread Maillard freewheels had a...

Early English thread Maillard freewheels had a small rectangular mark on the back of the body to indicate thread spec. Later production was explicitly marked with thread spec: "1.37 x 24 BSA"


...
09-04-20, 06:22 PM
Replies: 7
Views: 270
Posted By JohnDThompson

Some Maillard/Atom/Normandy (different brands...

Some Maillard/Atom/Normandy (different brands from the same company) freewheels were available in either metric or English thread, so they could be used on many manufacturer's bikes. Schwinn used...
09-04-20, 12:08 PM
Replies: 19
Views: 560
Posted By JohnDThompson

Those are sunglasses, not goggles. These are...

Those are sunglasses, not goggles.

These are goggles:
09-04-20, 09:25 AM
Replies: 9
Views: 397
Posted By JohnDThompson

As noted by others above, that crank...

As noted by others above, that crank configuration was stock on the Sports Tourer. The extra ring is ramped to facilitate shifting the large jump between inner and outer rings:
09-04-20, 08:41 AM
Replies: 5
Views: 155
Posted By JohnDThompson

As it happens, SunRace does offer a bottom...

As it happens, SunRace does offer a bottom bracket cartridge for cottered cranks:

https://www.dutchbikebits.com/image/cache/data/685766-500x500.jpg...
09-03-20, 09:05 AM
Replies: 17
Views: 378
Posted By JohnDThompson

Looks like the old style Shimano "Boss"...

Looks like the old style Shimano "Boss" freewheel. Those have been out of production for at least 30 years, and the tool (TL-FW20) is not easy to find. An established bike shop or local bike co-op...
09-02-20, 06:48 AM
Replies: 69
Views: 1,950
Posted By JohnDThompson

The same mitigation methods used to fight spread...

The same mitigation methods used to fight spread of covid-19 will also help against seasonal influenza: mask use, social distancing, hygiene. And seasonal influenza has an additional, effective...
09-01-20, 07:42 PM
Replies: 20
Views: 920
Posted By JohnDThompson

I actually have two as well, a Campagnolo and a...

I actually have two as well, a Campagnolo and a TA.

A problem with a 41T ring on a 144mm BCD crank is that the chain side plates tend to hit the spider. Avocet/Ofmega addressed this by milling...
08-31-20, 07:33 AM
Replies: 24
Views: 567
Posted By JohnDThompson

A bicycle's frame comprises only a tiny fraction...

A bicycle's frame comprises only a tiny fraction of its visible profile. If your goal is visibility for safety, don't worry about the color of the frame, but invest in bright clothing and good lights.
08-28-20, 08:12 AM
Replies: 59
Views: 2,056
Posted By JohnDThompson

I do on one of my bikes. I didn't ask for it, but...

I do on one of my bikes. I didn't ask for it, but Tim Isaac put it on anyway and clear-coated over it when he repainted the frame. Not that I mind, mind you.
08-27-20, 01:43 PM
Replies: 21
Views: 837
Posted By JohnDThompson

Chrome-moly has a higher tensile strength than...

Chrome-moly has a higher tensile strength than High-Ten steel and thus can be drawn into thinner (lighter) tubes than High-Ten and still be strong enough to ride. High_Ten is also often, but not...
08-27-20, 08:36 AM
Replies: 11
Views: 359
Posted By JohnDThompson

Yes, he did. But not quite like the OP's unit....

Yes, he did. But not quite like the OP's unit. Pino's cartridge was Italian thread, and used lockrings on both sides to hold it in place, unlike the "fixed cup" on the drive side of the OP's unit....
08-26-20, 06:52 PM
Replies: 25
Views: 872
Posted By JohnDThompson

Not around here, with the CAFOs...

Not around here, with the CAFOs (https://en.wikipedia.org/wiki/Concentrated_animal_feeding_operation) spreading their manure on the fields. We get the full effect. "Come to Wisconsin and smell our...
08-25-20, 05:12 PM
Replies: 174
Views: 6,269
Posted By JohnDThompson

Straight-blade forks. Meh. Just meh.

Straight-blade forks.

Meh.

Just meh.
08-25-20, 09:12 AM
Replies: 135
Views: 4,439
Posted By JohnDThompson

Toeclips and slotted cleats.

Toeclips and slotted cleats.
08-25-20, 07:32 AM
Replies: 53
Views: 1,525
Posted By JohnDThompson

The preference for cold water may also be...

The preference for cold water may also be cultural. We have a large Hmong community (Laotian refugees) here. Laos is a hot and humid country. In caring for Hmong elders in the hospital, we learned...
08-23-20, 05:33 PM
Replies: 16
Views: 437
Posted By JohnDThompson

Assuming the same mounting interface, if you're...

Assuming the same mounting interface, if you're lucky, the new crank will fit on the old bottom bracket. But the only way to find out is to try it. Decent bottom brackets aren't terribly expensive,...
08-23-20, 05:20 PM
Replies: 10
Views: 386
Posted By JohnDThompson

Tracking down owners of unclaimed/stolen bikes is...

Tracking down owners of unclaimed/stolen bikes is pretty close to the bottom of the priority list for police departments. Unless the owner physically comes to the police impound area to look for...
08-23-20, 03:20 PM
Replies: 145
Views: 4,644
Posted By JohnDThompson

Unless you're wearing a properly fitted N95 or...

Unless you're wearing a properly fitted N95 or better respirator mask, the mask you're wearing isn't so much to protect you from other people's infection as it is to protect other people from being...
08-22-20, 06:18 PM
Replies: 145
Views: 4,644
Posted By JohnDThompson

Some new research suggests that neck gaiters...

Some new research suggests that neck gaiters offer little or no protection to the wearer, and depending on the material, may actually increase risk for others by breaking up large droplets and...
08-22-20, 06:08 PM
Replies: 145
Views: 4,644
Posted By JohnDThompson

It takes time for UV to denature a virus. If...

It takes time for UV to denature a virus. If you're close enough to other people to exchange viral droplets with them, those droplets aren't likely exposed to UV long enough to be effectively...
08-22-20, 07:17 AM
Replies: 19
Views: 391
Posted By JohnDThompson

Flickr uses some odd code to prevent the typical...

Flickr uses some odd code to prevent the typical "right click => Copy Image Location" method that works on most other sites. I find I need to look at the page source, [CTRL-U] in most browsers, then...
08-22-20, 07:03 AM
Replies: 58,126
Views: 8,487,577
Posted By JohnDThompson

Looks like a cyclocross crank.

Looks like a cyclocross crank.
08-20-20, 08:55 PM
Replies: 145
Views: 4,644
Posted By JohnDThompson

All my rides are solo rides this year. I don't...

All my rides are solo rides this year. I don't wear a mask while riding, but I have one to use if/when I stop where social distance might not be maintained.
08-19-20, 02:52 PM
Replies: 263
Views: 9,208
Posted By JohnDThompson

There's more than that to account for it. Both...

There's more than that to account for it. Both TIG welding (whether or not automated/robotic) and metallurgy have improved dramatically in the past 20 years. The manufacturing methods of modern...
08-19-20, 07:35 AM
Replies: 25
Views: 785
Posted By JohnDThompson

Looks more like TIG to me. Ritchey's bronze...

Looks more like TIG to me. Ritchey's bronze fillets were much larger and smoother than the joints on this frame.
08-19-20, 07:11 AM
Replies: 11
Views: 272
Posted By JohnDThompson

And new French thread bottom brackets and...

And new French thread bottom brackets and headsets are available from e.g. Velo-Orange, not to mention threadless cartridge bottom brackets that will also work.
08-17-20, 04:48 PM
Replies: 15
Views: 351
Posted By JohnDThompson

To avoid damaging the paint, you can insert a...

To avoid damaging the paint, you can insert a slightly undersize seat post just to the depth of the slot, and use that as a lever to open the slot slightly.
08-17-20, 06:29 AM
Replies: 13
Views: 565
Posted By JohnDThompson

"Triple triangle," aka "Hellenic" frames are an...

"Triple triangle," aka "Hellenic" frames are an aesthetic flourish, not a performance or structural improvement.
Forum: Road Cycling
08-16-20, 05:25 PM
Replies: 13
Views: 487
Posted By JohnDThompson

Yes, you can. You need to take care that the cup...

Yes, you can. You need to take care that the cup doesn't go crooked as you thread it in. A real piloted bottom bracket tap set ensures that both sides of the shell are tapped coaxially.
08-13-20, 09:10 AM
Replies: 2
Views: 248
Posted By JohnDThompson

The "Success" is probably the closest in...

The "Success" is probably the closest in appearance to the Jubilee and less delicate, but any of them are decent performers.
08-10-20, 07:06 AM
Replies: 24
Views: 792
Posted By JohnDThompson

A mid-70s Motobécane is likely to have metric...

A mid-70s Motobécane is likely to have metric (aka "French" or possibly even "Swiss") bottom bracket thread. I don't think the UN55 or other Shimano cartridges were offered with metric thread....
08-09-20, 04:44 PM
Replies: 23,139
Views: 2,649,674
Posted By JohnDThompson

You just have to train yourself to ignore...

You just have to train yourself to ignore everything except the ETRTO/ISO size designation: 40-622
08-09-20, 03:26 PM
Replies: 68
Views: 2,102
Posted By JohnDThompson

Only if you're OCD enough to insist on always...

Only if you're OCD enough to insist on always following a strict, linear progression. I don't, anymore. If I need a little change, I shift the rear derailleur. If I need a bigger change, I shift the...
08-09-20, 07:23 AM
Replies: 42
Views: 1,528
Posted By JohnDThompson

A couple oldies:

A couple oldies:
08-08-20, 09:19 AM
Replies: 7
Views: 281
Posted By JohnDThompson

A big adjustable wrench will loosen the locknut....

A big adjustable wrench will loosen the locknut. Be aware that it is a left-hand thread, so clockwise to loosen. Same with the cone. And if you're doing an overhaul (remove crank, clean out old...
08-07-20, 07:21 PM
Replies: 22
Views: 654
Posted By JohnDThompson

FWIW, Sutherland's (4th edition) shows the...

FWIW, Sutherland's (4th edition) shows the Campagnolo taper as slightly shorter than ISO:
08-07-20, 07:11 PM
Replies: 3,153
Views: 277,107
Posted By JohnDThompson

Not sure if this will help, but I used the...

Not sure if this will help, but I used the straddle cable anchor bolt from a set of MAFAC "Racer" brakes for that purpose on my similar Maillard drum brake hubs:
Showing results 1 to 50 of 420
 


 
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