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10-15-19, 07:48 PM
Replies: 5
Views: 93
Posted By JohnDThompson

Campagnolo, at odd-ball Italian 10mm x 26tpi will...

Campagnolo, at odd-ball Italian 10mm x 26tpi will probably not work. And as Helicomatic rear hubs use odd-ball 5/32" balls rather than standard 1/4" balls, whatever axle you find will have to use the...
10-15-19, 11:00 AM
Replies: 24
Views: 1,972
Posted By JohnDThompson

Whether or not you might like oval or other...

Whether or not you might like oval or other non-round chain rings is something only you can decide.

FWIW, Shimano spent a great deal of money on ergonomic research to develop their BioPace rings....
10-15-19, 10:44 AM
Replies: 232
Views: 32,256
Posted By JohnDThompson

The model 700 frame geometry was essentially the...

The model 700 frame geometry was essentially the same as was used on the earlier "sport-touring" models. It differed from the 760 mainly in having a slightly longer wheelbase (slacker head and seat...
10-15-19, 10:26 AM
Replies: 62
Views: 3,141
Posted By JohnDThompson

The first couple years of production, a Cinelli...

The first couple years of production, a Cinelli CC sloping crown was used on that model. Later production used the flat Tange "Trident" crown pictured above.
10-15-19, 09:51 AM
Replies: 71
Views: 4,197
Posted By JohnDThompson

I'm curious. What model Brooks saddle was this? ...

I'm curious. What model Brooks saddle was this?



The Sella Italia Turbo was my favorite for many years as well, but about 15 years ago my butt decided it liked Brooks Professionals and Idéale...
10-14-19, 12:31 PM
Replies: 7
Views: 147
Posted By JohnDThompson

As will the fork crown. Investment cast crowns...

As will the fork crown. Investment cast crowns tend to be heavier than stamped crowns, full-sloping crowns heavier than flat crowns, solid crowns heavier than hollow crowns, etc.

Sometimes you can...
10-14-19, 07:30 AM
Replies: 38
Views: 840
Posted By JohnDThompson

The Edco has been out of production for many...

The Edco has been out of production for many years, so sourcing one might be a problem. There are other threadless options as well. YST makes an inexpensive threadless cartridge. Mavic also made one,...
10-13-19, 12:28 PM
Replies: 8
Views: 388
Posted By JohnDThompson

Powerful steroids like methyprednisolone have...

Powerful steroids like methyprednisolone have many detrimental side effects, most of which appear with chronic use. They're not drugs to be prescribed lightly. They can suppress inflammatory...
10-12-19, 04:24 PM
Replies: 11
Views: 389
Posted By JohnDThompson

Unloaded, it's pretty much meaningless. Unless...

Unloaded, it's pretty much meaningless. Unless you can tell that the bearing are worn out (roughness or binding when turning the axle), replacing the cartridges is unlikely to improve unloaded spin...
10-12-19, 06:01 AM
Replies: 3
Views: 151
Posted By JohnDThompson

Different cable-pull ratios mean the levers won't...

Different cable-pull ratios mean the levers won't properly position the derailleur.
10-12-19, 05:50 AM
Replies: 9
Views: 247
Posted By JohnDThompson

The OP's crank is a post-1982 Stronglight and...

The OP's crank is a post-1982 Stronglight and should have standard 22mm extractor thread.

I do note that the spindle is a male-type (nutted) spindle which may work better with a Maxy-type...
Forum: Framebuilders
10-11-19, 01:03 PM
Replies: 25
Views: 745
Posted By JohnDThompson

Trek used Signicast in Milwaukee for frame...

Trek used Signicast in Milwaukee for frame fittings in the 1980s. I don't know how amenable they are to small production runs.
10-11-19, 12:40 PM
Replies: 14
Views: 604
Posted By JohnDThompson

I can't tell from the picture, but here is what...

I can't tell from the picture, but here is what to look for (the picture shows fork ends, but the same treatments were used on the rear stay ends as well):
...
10-11-19, 12:10 PM
Replies: 11
Views: 210
Posted By JohnDThompson

Or upgrade to friction shifting and coiled...

Or upgrade to friction shifting and coiled housing. :innocent:
10-11-19, 12:07 PM
Replies: 52
Views: 1,551
Posted By JohnDThompson

I've seen modern, narrow chains jam between the...

I've seen modern, narrow chains jam between the rings on older cranks.

7 and 8 speed chains are still readily available (and work fine on 5 and 6 speed clusters, for that matter), so why would you...
10-11-19, 07:17 AM
Replies: 34
Views: 1,087
Posted By JohnDThompson

TA did not make a track-specific 50.4mm 5-pin...

TA did not make a track-specific 50.4mm 5-pin crank arm. It was only the chainring that differed on the track crank: 3mm thick for 1/8" chain. TA track chainrings have a "3" stamped to distinguish...
10-11-19, 07:03 AM
Replies: 6
Views: 195
Posted By JohnDThompson

You may need to shorten the axle. If the ends of...

You may need to shorten the axle. If the ends of the axle extend past the dropout faces, the quick release will be unable to secure the wheel.
10-10-19, 11:36 AM
Replies: 15
Views: 262
Posted By JohnDThompson

There's nothing wrong with a clamp-on cable...

There's nothing wrong with a clamp-on cable guide, as Reynolds 531 suggests. That's what I'd do if it were my bike.
10-10-19, 11:33 AM
Replies: 14
Views: 604
Posted By JohnDThompson

The early 80s 6nn series frames had Reynolds 531...

The early 80s 6nn series frames had Reynolds 531 main triangles brazed in Waterloo, which were mated with rear triangle subassemblies and forks brazed in Japan. The tubing used for the forks and...
10-10-19, 07:27 AM
Replies: 38
Views: 840
Posted By JohnDThompson

Make sure you use a piloted tap set to do this,...

Make sure you use a piloted tap set to do this, to ensure that the threads on each side are co-axial.
10-09-19, 05:58 AM
Replies: 3
Views: 763
Posted By JohnDThompson

That's a possibility. Looks like the padded...

That's a possibility. Looks like the padded envelopes have a 4# weight limit. I'll have to weigh the hub and see if it will work.
10-08-19, 09:06 PM
Replies: 3
Views: 763
Posted By JohnDThompson

I'm willing to ship to Canada, but it seems the...

I'm willing to ship to Canada, but it seems the lowest USPS price I can find is about $US27 for a flat-rate box that may not quite fit the hub.
10-08-19, 03:06 PM
Replies: 32
Views: 771
Posted By JohnDThompson

Grease is an emulsion of soap and oil. The solid...

Grease is an emulsion of soap and oil. The solid matter you see is the soap component left behind after the oil has separated from the emulsion and drained out. If you want to avoid potentially toxic...
10-08-19, 07:07 AM
Replies: 6
Views: 182
Posted By JohnDThompson

Assuming original components, Shimano Crane...

Assuming original components, Shimano Crane derailleurs would put it mid to late 1970s. Components and frame description suggest an upper level model. As always, pictures would help.
10-07-19, 04:32 PM
Replies: 105
Views: 6,825
Posted By JohnDThompson

Works a charm. About a minute per wheel. No nasty...

Works a charm. About a minute per wheel. No nasty solvents, no tiresome scrubbing.

http://www.os2.dhs.org/~john/rim-before.jpg

http://www.os2.dhs.org/~john/rim-after.jpg
10-07-19, 06:42 AM
Replies: 36
Views: 1,185
Posted By JohnDThompson

I bring my work clothes in a plastic bag and...

I bring my work clothes in a plastic bag and change when I get to work.
10-06-19, 01:18 PM
Replies: 7
Views: 243
Posted By JohnDThompson

It depends which specific cog you need: ...

It depends which specific cog you need:

http://www.os2.dhs.org/~john/suntour-cogs0001.jpg
10-06-19, 07:14 AM
Replies: 16
Views: 521
Posted By JohnDThompson

Yes. They were standard equipment on the Trek 720...

Yes. They were standard equipment on the Trek 720 loaded touring bike BITD.
10-05-19, 08:20 PM
Replies: 21,541
Views: 2,173,584
Posted By JohnDThompson

Even in 650A (590mm bead seat diameter)? Not even...

Even in 650A (590mm bead seat diameter)? Not even Tandems East seems to carry them. :(
10-05-19, 08:05 PM
Replies: 6
Views: 204
Posted By JohnDThompson

No, it's not possible. And even if it were...

No, it's not possible. And even if it were possible, you'd lose the primary benefit of a freehub system: locating the drive side bearing closer to the dropout to prevent axle breakage.
10-05-19, 05:00 PM
Replies: 19
Views: 526
Posted By JohnDThompson

I use 165mm arms on my fixed gear bikes; one is a...

I use 165mm arms on my fixed gear bikes; one is a road conversion, the other dedicated fixed gear.
10-05-19, 02:11 PM
Replies: 19
Views: 526
Posted By JohnDThompson

Take it easy until you've learned how fast/hard...

Take it easy until you've learned how fast/hard you can corner without pedal strike. Just about everybody dumps it a couple times when they're first starting out. Take it easy on unfamiliar corners...
10-05-19, 06:07 AM
Replies: 6
Views: 225
Posted By JohnDThompson

That it only happens when coasting suggests to me...

That it only happens when coasting suggests to me that the issue is in the ratchet mechanism. Lubricate that and see if it helps.
10-05-19, 06:02 AM
Replies: 10
Views: 280
Posted By JohnDThompson

Track frames designed to be ridden on a banked...

Track frames designed to be ridden on a banked velodrome have fairly high bottom brackets to prevent pedal strike. If this is a converted road frame, the bottom bracket may be lower than that on a...
10-04-19, 04:15 PM
Replies: 23
Views: 1,589
Posted By JohnDThompson

During my career as an RN, I cared for many...

During my career as an RN, I cared for many shingles patients. It can be thoroughly miserable, sometimes requiring hospitalization and intravenous pain killers. And it can leave you with permanent...
10-03-19, 09:32 PM
Replies: 123
Views: 8,192
Posted By JohnDThompson

At least 40 years for me as well. I think a Trek...

At least 40 years for me as well. I think a Trek 710 frameset bought through the shop where I worked as a mechanic was the last one.
10-02-19, 01:55 PM
Replies: 10
Views: 289
Posted By JohnDThompson

That's an odd collection of parts on the bike....

That's an odd collection of parts on the bike. The rear derailleur does appear to be a long cage Huret Jubilee. Both the derailleurs and the and the crank appear to be incongruously high-end for a...
10-01-19, 02:29 PM
Replies: 53
Views: 2,783
Posted By JohnDThompson

That's like my old Sony digital camera. The...

That's like my old Sony digital camera. The battery went TU long ago, but it still works fine plugged into AC power. It has a nice Ziess-designed lens and takes better close-up pictures than my...
10-01-19, 02:26 PM
Replies: 28
Views: 767
Posted By JohnDThompson

Yes, the threads look buggered on the axle. A...

Yes, the threads look buggered on the axle. A thread file might be able to clean them up. Otherwise, those were common hubs on bike-boom era bikes and replacement axles shouldn't be too hard to find....
10-01-19, 02:18 PM
Replies: 28
Views: 839
Posted By JohnDThompson

Cable guide for under the bottom bracket cable...

Cable guide for under the bottom bracket cable routing. The bare metal patches likely once had similar loops, perhaps drewed off to allow the bike to be used on a trainer.
10-01-19, 02:14 PM
Replies: 28
Views: 839
Posted By JohnDThompson

Braze-ons could have been added later. 6-cog...

Braze-ons could have been added later. 6-cog freewheels have been available since the early 70s at least, and the Campagnolo 1060 dropouts since the 1960s. So it could be much earlier than 1980s.
...
10-01-19, 01:50 PM
Replies: 17
Views: 361
Posted By JohnDThompson

Yes, the front-freewheel rear cluster uses the...

Yes, the front-freewheel rear cluster uses the Shimano TL-FW20 tool for removal. It's been out of production since the mid-1980s but you can still find them on the used market.
...
10-01-19, 06:52 AM
Replies: 26
Views: 2,052
Posted By JohnDThompson

Worse than the Cinelli 1/R, even? ...

Worse than the Cinelli 1/R, even?

http://velobase.com/CompImages/Stems/B781C69D-112F-4823-8789-89398E2139CB.jpeg
10-01-19, 06:50 AM
Replies: 26
Views: 2,052
Posted By JohnDThompson

That's what shims are for. Many people cut them...

That's what shims are for. Many people cut them out of old soda or beer cans. Nitto offers purpose-made handlebar shims. I have a roll of brass shim stock I use for this.
10-01-19, 06:42 AM
Replies: 19
Views: 547
Posted By JohnDThompson

Both Shimano and Campagnolo were unprepared for...

Both Shimano and Campagnolo were unprepared for the success of the Look pedal. The first clipless pedals from both Shimano and Campagnolo were made by Look for them. Neither company liked that...
10-01-19, 06:35 AM
Replies: 19
Views: 547
Posted By JohnDThompson

Shimano put a titanium nitride coating on the...

Shimano put a titanium nitride coating on the crown race of those Dura-Ace headsets, which increased the hardness and, apparently, improved longevity. I'm not aware of any other headset with that...
09-30-19, 09:44 AM
Replies: 4
Views: 188
Posted By JohnDThompson

The rule of thumb is 2-1/2 times the diameter of...

The rule of thumb is 2-1/2 times the diameter of the shaft. A 1" steer tube takes a 22.2mm stem so 22.2*2.5=55.5mm; repechage's 55mm figure is acceptably close, given that it doesn't land in the...
09-30-19, 06:18 AM
Replies: 3
Views: 458
Posted By JohnDThompson

The larger pulleys allow more chain to be wrapped...

The larger pulleys allow more chain to be wrapped for a given cage length. Off-road bikes tend to have wider gear range than road bikes, and the derailleur needs to wrap more chain to cover that...
09-29-19, 01:24 PM
Replies: 2,158
Views: 370,729
Posted By JohnDThompson

SunTour already had a Cyclone crank before the...

SunTour already had a Cyclone crank before the Sakae Ringyo CR crank came on the market. This crank was made by Sugino, before SunTour became SunTourSR:
...
09-29-19, 09:38 AM
Replies: 1
Views: 255
Posted By JohnDThompson

Schwinn-Approved bar-end shift levers

Schwinn-Approved bar-end shift levers, with two pieces of original stainless steel housing and original braided cables. These are Schwinn-badged versions of SunTour's "Bar Con" ratcheting handlebar...
Showing results 1 to 50 of 1000
 


 
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