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Search: Posts Made By: JohnDThompson
Showing results 1 to 50 of 1000
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12-08-19, 02:26 PM
Replies: 25
Views: 2,209
Posted By JohnDThompson

The Waterloo factory was unable to keep up with...

The Waterloo factory was unable to keep up with demand, so the 4xx series frames were outsourced to Japan. When I started at Trek in 1980, production was about 10,000 bikes/year. This was in the new...
12-08-19, 01:50 PM
Replies: 60
Views: 1,879
Posted By JohnDThompson

I don't see any egregious problem with the...

I don't see any egregious problem with the threads. That you can thread an English thread cup onto the fork is due to the fact that the larger diameter of the cup means that the threads don't fully...
12-08-19, 09:35 AM
Replies: 18
Views: 390
Posted By JohnDThompson

I've used the conical Campagnolo 733/14...

I've used the conical Campagnolo 733/14 "centraliser sleeve" from my headset press to fix damage like that. Tap it into the head tube to force out the dent:
...
12-08-19, 09:27 AM
Replies: 40
Views: 1,146
Posted By JohnDThompson

The metric threads on these bikes are only an...

The metric threads on these bikes are only an issue if you have to source replacement parts. If they're still in usable condition, there's no reason to take them out of service simply because of the...
12-08-19, 09:08 AM
Replies: 19
Views: 529
Posted By JohnDThompson

Maybe I've just been lucky, but a standard...

Maybe I've just been lucky, but a standard deburring tool has always worked fine for me.

https://images-na.ssl-images-amazon.com/images/I/31JKA51F2YL._SX385_.jpg...
12-08-19, 09:04 AM
Replies: 5
Views: 133
Posted By JohnDThompson

BITD, we just used a piece of an old inner tube...

BITD, we just used a piece of an old inner tube stretched over the cups for that purpose.
Forum: Framebuilders
12-05-19, 02:57 PM
Replies: 14
Views: 844
Posted By JohnDThompson

A steel cone could be used to push out the dent....

A steel cone could be used to push out the dent. You'd likely need to chase the threads and re-face afterward, but I suspect it could be done with minimal damage to the paint.
12-05-19, 02:17 PM
Replies: 6
Views: 127
Posted By JohnDThompson

Yes, freehub tool for the long-obsolete Uniglide...

Yes, freehub tool for the long-obsolete Uniglide style freehubs.
12-05-19, 09:21 AM
Replies: 15
Views: 668
Posted By JohnDThompson

Both SL and SP have the helical ribs, as do the...

Both SL and SP have the helical ribs, as do the newer SLX and SPX; the difference is the thickness of the tubes. But the generic Columbus decal shown above applied to both SL and SP tubing and thus...
12-04-19, 03:24 PM
Replies: 15
Views: 668
Posted By JohnDThompson

Reynolds steer tubes are not splined, but you may...

Reynolds steer tubes are not splined, but you may see "REYNOLDS 531 BUTTED" stamped near the crown. Sometimes the stamp is lost when the tube is trimmed prior to brazing:
...
12-04-19, 03:00 PM
Replies: 10
Views: 193
Posted By JohnDThompson

IIRC, the transition happened late 70s to early...

IIRC, the transition happened late 70s to early 80s. Motobeacane was one of the early adopters; Peugeot couldn't seem to make up their mind, with French Swiss and English all happening in the early...
12-04-19, 02:30 PM
Replies: 6
Views: 239
Posted By JohnDThompson

A dental caliper is a readily available and...

A dental caliper is a readily available and inexpensive tool for this:

https://images-na.ssl-images-amazon.com/images/I/61pzYl18eeL._AC_SX569_.jpg...
12-04-19, 02:02 PM
Replies: 24
Views: 514
Posted By JohnDThompson

Those look to me like SedisSport chain links. ...

Those look to me like SedisSport chain links.



The black oxide would have been dissolved by the brazing flux had they ever been brazed. I thought the same about them being used for cone...
12-03-19, 09:05 AM
Replies: 43
Views: 963
Posted By JohnDThompson

Stronglight's taper is slightly different on each...

Stronglight's taper is slightly different on each side, as Sutherland's chart shows:

http://www.os2.dhs.org/~john/spindle-taper.jpg
Source: Sutherland's 4th Edition
12-03-19, 09:01 AM
Replies: 8
Views: 189
Posted By JohnDThompson

Any 7 or 8 speed chain ought to be fine.

Any 7 or 8 speed chain ought to be fine.
12-03-19, 08:28 AM
Replies: 24
Views: 318
Posted By JohnDThompson

The Stronglight rollers are cylindrical, not...

The Stronglight rollers are cylindrical, not tapered. This means there is some sliding contact as the bearing rotates, but as noted above, headsets are not in constant rotation when in use, so the...
12-02-19, 08:53 PM
Replies: 4
Views: 166
Posted By JohnDThompson

The different color on the springs indicates...

The different color on the springs indicates whether they are for the left arm or the right arm. You need one of each color for each brake, front and back.
12-02-19, 08:42 PM
Replies: 43
Views: 963
Posted By JohnDThompson

Either Sugino or Sakae Ringyo, I believe.

Either Sugino or Sakae Ringyo, I believe.
12-02-19, 08:26 PM
Replies: 24
Views: 318
Posted By JohnDThompson

A roller bearing headset will always have more...

A roller bearing headset will always have more drag than a ball-and-cup headset, but since, unlike hubs or bottom brackets, headsets are not in constant rotation when in use, that increased friction...
12-02-19, 03:17 PM
Replies: 1,924
Views: 165,875
Posted By JohnDThompson

I have some NOS Continental 700Cx20 tires, if...

I have some NOS Continental 700Cx20 tires, if that would help:

http://www.os2.dhs.org/~john/trade/conti-700x20.jpg
12-02-19, 02:49 PM
Replies: 24
Views: 318
Posted By JohnDThompson

IMO, those Stronglight roller bearing headsets...

IMO, those Stronglight roller bearing headsets are the best threaded headsets ever made. They combined durability, lightness, and affordability in a way that has never been matched. If your headset...
12-02-19, 09:14 AM
Replies: 19
Views: 504
Posted By JohnDThompson

A Shimano Crane or Titlist derailleur would only...

A Shimano Crane or Titlist derailleur would only require tapping the mounting bolt hole with 10mm x 1mm thread; no filing needed.

I have Peugeot-branded Stronglight 104 crank arms that are about a...
12-01-19, 06:15 PM
Replies: 9
Views: 200
Posted By JohnDThompson

First, what is it you hope to gain by making...

First, what is it you hope to gain by making those changes?
11-30-19, 09:40 PM
Replies: 37
Views: 1,870
Posted By JohnDThompson

What, specifically, are those "preferences that...

What, specifically, are those "preferences that don't seem to be met by the industry?" If it's merely component choices, find a frame you like and build it up with the components you prefer. If the...
11-30-19, 07:39 AM
Replies: 22
Views: 510
Posted By JohnDThompson

Phil Wood? ...

Phil Wood?

http://www.os2.dhs.org/~john/bb-cartridge-tools.jpg
11-30-19, 07:20 AM
Replies: 60
Views: 3,126
Posted By JohnDThompson

You say you checked the frame alignment with the...

You say you checked the frame alignment with the "string test," but did you check the fork alignment? That's a bit trickier without a tool like the Park FT-4:
...
Forum: Framebuilders
11-29-19, 12:18 PM
Replies: 17
Views: 470
Posted By JohnDThompson

That's a pretty significant dent, even for a...

That's a pretty significant dent, even for a steel tube. Prestige tubing is heat-treated and may not respond well to rolling out the dent. The best option would be to replace the tube, but unless you...
11-29-19, 12:07 PM
Replies: 10
Views: 387
Posted By JohnDThompson

Alternating eye patching is sometimes used after...

Alternating eye patching is sometimes used after traumatic brain injury to accommodate vision problems.
11-29-19, 12:00 PM
Replies: 13
Views: 468
Posted By JohnDThompson

Exactly. Why bother?

Exactly. Why bother?
11-28-19, 04:44 PM
Replies: 0
Views: 85
Posted By JohnDThompson

SS/FG rear wheel

Weinmann rim round and true, Formula hub, 16T Shimano single freewheel, 15T fixed cog included. US$50 plus shipping:

http://www.os2.dhs.org/~john/riverview/formula/01.jpg
...
11-28-19, 08:01 AM
Replies: 30
Views: 1,183
Posted By JohnDThompson

That's why we now have "lawyer lips" on forks,...

That's why we now have "lawyer lips" on forks, which rather obviate the purpose of the quick release.
11-27-19, 09:10 PM
Replies: 30
Views: 1,183
Posted By JohnDThompson

The "Locked" and "Unlocked" markings were a CPSC...

The "Locked" and "Unlocked" markings were a CPSC compliance change. Prior to about 1976, the QR levers were straight and not marked "Locked" or "Unlocked."
11-27-19, 09:03 PM
Replies: 65
Views: 2,642
Posted By JohnDThompson

My old legs couldn't hack the 53/42 rings on my...

My old legs couldn't hack the 53/42 rings on my Super Record crank, so it got replaced with a Zeus 48/36 crank:

http://www.os2.dhs.org/~john/zeus-drillium.jpg

Mounted on a Zeus 2000 titanium...
11-27-19, 08:32 PM
Replies: 20
Views: 621
Posted By JohnDThompson

BITD, you could use tires with sidewalls...

BITD, you could use tires with sidewalls specifically designed to work with that type of dynamo, and the dynamo could be fitted with a plastic cap to reduce wear on the sidewall. I haven't seen those...
11-27-19, 03:25 PM
Replies: 12
Views: 344
Posted By JohnDThompson

I only recall the 1-3/8" x 26tpi bottom brackets...

I only recall the 1-3/8" x 26tpi bottom brackets on the Raleigh-branded production, but it's worth checking to be sure. If the OP's frame does have the 26tpi thread, there are at least three options...
11-27-19, 02:28 PM
Replies: 14
Views: 348
Posted By JohnDThompson

I agree it is likely a factory repaint. Fork may...

I agree it is likely a factory repaint. Fork may not be original, as I don't recall that Haden crown being used prior to about 1980. Nor would rack mounts on the fork blades have been standard until...
11-26-19, 04:20 PM
Replies: 12
Views: 344
Posted By JohnDThompson

Probably a 115 to 118mm spindle would work. Hard...

Probably a 115 to 118mm spindle would work. Hard to predict, as the Silstar crank pre-dates modern cartridge bearing bottom brackets by many years. Some cartridge units, e.g., Phil and Mavic, allow...
11-26-19, 04:07 PM
Replies: 7
Views: 278
Posted By JohnDThompson

I have two wheel sets with Arc en Ciel rims; one...

I have two wheel sets with Arc en Ciel rims; one from the early 70s, the other from the early 80s. None of the rims have any dimpling or texturing on the braking surfaces.
Forum: Framebuilders
11-25-19, 04:48 PM
Replies: 11
Views: 4,876
Posted By JohnDThompson

/ You'd need at least a fuel/oxygen flame to...

/

You'd need at least a fuel/oxygen flame to get hot enough to effectively melt brass into something with the mass of a bottom bracket shell. If it were my bike, I'd either go with the threadless...
11-25-19, 08:09 AM
Replies: 32
Views: 837
Posted By JohnDThompson

Bolt cutter: ...

Bolt cutter:

https://shop.harborfreight.com/media/catalog/product/cache/1/image/9df78eab33525d08d6e5fb8d27136e95/6/0/60699_I.jpg
11-24-19, 02:48 PM
Replies: 31
Views: 1,742
Posted By JohnDThompson

Maybe copying them to a Bike Forums album will...

Maybe copying them to a Bike Forums album will work? I'll be damned if I can get them into chronological order, though. :notamused:

https://www.bikeforums.net/g/album/15938101#
Forum: Framebuilders
11-24-19, 02:05 PM
Replies: 5
Views: 333
Posted By JohnDThompson

There's some work-hardening that results from...

There's some work-hardening that results from rolling out dents. Filling low spots with lead solder rather than brass or silver requires less heat.
11-24-19, 01:58 PM
Replies: 17
Views: 632
Posted By JohnDThompson

My lonely Superbe parked at work at the hospital:...

My lonely Superbe parked at work at the hospital:

http://www.os2.dhs.org/~john/superbe/10192014.jpg
11-24-19, 01:29 PM
Replies: 4
Views: 220
Posted By JohnDThompson

Split crown races only work with cartridge...

Split crown races only work with cartridge bearing headsets. Ball-and-cup type headsets run the balls directly on the crown race and need the continuous race. Split races are easier to install and...
11-24-19, 07:54 AM
Replies: 58
Views: 1,372
Posted By JohnDThompson

As others have noted, your hub may limit the...

As others have noted, your hub may limit the smallest cog size on the rear cluster. Depending on make/model of your crank, larger chainrings may be available to provide higher gearing.
11-23-19, 11:55 AM
Replies: 6
Views: 388
Posted By JohnDThompson

The Kool Stop bead jack minimizes the risk of...

The Kool Stop bead jack minimizes the risk of damaging the tube when mounting a tight tire:

https://static.biketiresdirect.com/productimages/images650/ksslp2-1.jpg...
11-23-19, 11:13 AM
Replies: 60
Views: 1,879
Posted By JohnDThompson

French steer tubes are slightly smaller diameter...

French steer tubes are slightly smaller diameter than English/Italian; 25mm versus 25.4mm, so an English/Italian thread die wouldn't completely engage the threads on a French steer tube. That should...
11-23-19, 07:56 AM
Replies: 21,930
Views: 2,266,365
Posted By JohnDThompson

The biggest complaint is that the springless...

The biggest complaint is that the springless pawls engage unreliably.



I'm not sure of SA's rationale for this design, but I do see it as an advantage. The more common AW hub has a reputation...
11-22-19, 08:50 AM
Replies: 31
Views: 963
Posted By JohnDThompson

I measure 47mm to 60mm HTH…

I measure 47mm to 60mm

HTH…
11-21-19, 02:29 PM
Replies: 13
Views: 4,064
Posted By JohnDThompson

The reinforced plastic, carbon-friendly tire...

The reinforced plastic, carbon-friendly tire levers are often considerably thicker than metal levers, which can make it difficult to insert the lever between the bead and the rim. Perhaps try...
Showing results 1 to 50 of 1000
 


 
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