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Search: Posts Made By: JohnDThompson
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Forum: Road Cycling
08-16-19, 01:14 PM
Replies: 35
Views: 1,169
Posted By JohnDThompson

Titanium is expensive and requires specialized...

Titanium is expensive and requires specialized skills to work with. Carbon fiber is a much cheaper, lighter, and more versatile material.
08-15-19, 08:13 PM
Replies: 6
Views: 249
Posted By JohnDThompson

I seem to recall that Shimano contracted with...

I seem to recall that Shimano contracted with Tange to make their bottom brackets.

In any case, my experience is that Tange bottom brackets are very similar in quality to Shimano.
08-15-19, 03:30 PM
Replies: 4
Views: 265
Posted By JohnDThompson

I haven't notice that; perhaps it's an iPad...

I haven't notice that; perhaps it's an iPad thing?

What does annoy me is how when I use "Page Up," the Bike Forums banner drops down and covers some of the page text, and when I try to scroll...
08-15-19, 02:32 PM
Replies: 7
Views: 363
Posted By JohnDThompson

If you take care of it (protect it from weather,...

If you take care of it (protect it from weather, judicious application of Proofide), chances are it won't get to a point where you need to replace it. I have several Brooks saddles in use here,...
08-14-19, 08:49 PM
Replies: 5
Views: 236
Posted By JohnDThompson

My concern would be whether the SunTour V-GT...

My concern would be whether the SunTour V-GT derailleur has the same cable-pull expectations an SIS-compatible shift lever expects. The SunTour V-GT pre-dates SIS shifting by many years, so if this...
08-14-19, 01:35 PM
Replies: 21,070
Views: 2,072,876
Posted By JohnDThompson

As long as your bike is in good repair, I...

As long as your bike is in good repair, I wouldn't anticipate problems. I've ridden my Raleigh Superbe on the Lake Pepin 3-Speed Tour several times (about 40 miles from Red Wing to Wabasha, then 40...
08-14-19, 01:08 PM
Replies: 2
Views: 153
Posted By JohnDThompson

Bicycles are component systems and as such...

Bicycles are component systems and as such there's little Giant-specific technical information needed. Park Tools has an extensive collection of on-line bike repair tutorials:
...
08-13-19, 08:41 PM
Replies: 19
Views: 518
Posted By JohnDThompson

Perhaps this can help: ...

Perhaps this can help:

http://www.os2.dhs.org/~john/freewheel-markings.jpg
Source: Sutherland's 4th Edition
08-13-19, 08:26 PM
Replies: 44
Views: 1,406
Posted By JohnDThompson

Sure, but if your frame isn't designed for disc...

Sure, but if your frame isn't designed for disc brakes, this is irrelevant.
08-13-19, 08:20 PM
Replies: 8
Views: 229
Posted By JohnDThompson

No Trek of that era used anything other than a...

No Trek of that era used anything other than a 68mm shell and English thread.



Assuming no previous owner has cold-set the frame otherwise, it should have 126mm OLD spacing.



The seat...
08-13-19, 07:15 AM
Replies: 19
Views: 518
Posted By JohnDThompson

Newer (say, late 70s onward) Campagnolo hubs have...

Newer (say, late 70s onward) Campagnolo hubs have the thread spec explicitly stamped between the threads and the hub flange:

http://www.os2.dhs.org/~john/camp-hub-marking.jpg

Older hubs are...
08-13-19, 06:56 AM
Replies: 23
Views: 512
Posted By JohnDThompson

I'm not aware of a helicoil repair for stripped...

I'm not aware of a helicoil repair for stripped extractor threads, but VAR does make a kit to cut oversize threads into a stripped arm, and an oversize extractor tool for use with the new threads....
08-12-19, 05:20 PM
Replies: 1,320
Views: 106,616
Posted By JohnDThompson

I had a new experience riding tubulars today. I...

I had a new experience riding tubulars today. I had mounted a NOS Vittoria Mondiale tire on the rear wheel earlier this spring and have been riding it since. Went for a ride today, and after climbing...
08-12-19, 05:02 PM
Replies: 11
Views: 252
Posted By JohnDThompson

Looks like a relatively unmodified Simplex...

Looks like a relatively unmodified Simplex dropout as I suspected, no stop tab filed in the hanger for the B-screw to bear against. I don't see threads in the mounting hole, so I wonder if it was...
Forum: Road Cycling
08-12-19, 11:56 AM
Replies: 9
Views: 422
Posted By JohnDThompson

Using a 3/32" wide chain on a single speed limits...

Using a 3/32" wide chain on a single speed limits you to using only 3/32" drive train components (cogs, chainrings). Using 1/8" wide chain allows you to mix & match 3/32" and 1/8" cogs and chainrings...
08-12-19, 11:26 AM
Replies: 11
Views: 252
Posted By JohnDThompson

Well, it has a SunTour V-GT Luxe currently...

Well, it has a SunTour V-GT Luxe currently mounted, which suggests that the Simplex dropout has been threaded for the mounting bolt. But the weird "angle of the dangle" may mean that the PO didn't...
08-12-19, 11:05 AM
Replies: 10
Views: 391
Posted By JohnDThompson

I use a secondary retention system to prevent the...

I use a secondary retention system to prevent the light from coming off. A stout rubber band around the light, through the bag loop and over the clip does it for me.
08-12-19, 08:13 AM
Replies: 51,706
Views: 6,832,867
Posted By JohnDThompson

Lost the original Gios "coin," and the nickel is...

Lost the original Gios "coin," and the nickel is a good fit to replace it.
08-12-19, 07:43 AM
Replies: 40
Views: 2,221
Posted By JohnDThompson

Not to mention, the conspicuous lack of tire...

Not to mention, the conspicuous lack of tire clearance.
08-10-19, 04:00 PM
Replies: 15
Views: 357
Posted By JohnDThompson

I've managed to acquire grade III...

I've managed to acquire grade III Acromial-Clavicular separations in both my shoulders, a couple years apart. In both cases, the orthopedic surgeon advised that he could either operate or prescribe...
08-10-19, 03:32 PM
Replies: 76
Views: 2,647
Posted By JohnDThompson

Correct. The Delta caliper articulation was...

Correct. The Delta caliper articulation was completely different from the AX:
http://www.os2.dhs.org/~john/delta03-450.JPG
08-10-19, 06:19 AM
Replies: 18
Views: 479
Posted By JohnDThompson

The tube will expand to fill the space available....

The tube will expand to fill the space available. But it will also be stretched thinner than a properly sized tube, and thus arguably more prone to puncture.
08-10-19, 06:08 AM
Replies: 20
Views: 533
Posted By JohnDThompson

Sounds like a chain wrap issue. A longer-arm rear...

Sounds like a chain wrap issue. A longer-arm rear derailleur would likely fix this. Sometimes, all that is needed is a little adjustment of the "B-screw" on the derailleur.
...
08-10-19, 06:03 AM
Replies: 26
Views: 597
Posted By JohnDThompson

The BB drop remains the same regardless of wheel...

The BB drop remains the same regardless of wheel diameter. What changes is the BB height/ground clearance. This amount of this change will be the difference in tire radius. If your bike already has a...
08-09-19, 04:14 PM
Replies: 10
Views: 391
Posted By JohnDThompson

The biggest issue will likely be brakes, unless...

The biggest issue will likely be brakes, unless you have disc brakes. If you have rim brakes, you'll probably need longer reach calipers to allow the brake pads to reach the rim.
08-08-19, 04:42 PM
Replies: 11
Views: 712
Posted By JohnDThompson

It is/was a gathering of steel bike enthusiasts...

It is/was a gathering of steel bike enthusiasts for a ride around Milwaukee. I attended the first one, back in 2009 or so. It seemed more of a pub-crawl than a bike ride, which I guess shouldn't be a...
08-08-19, 06:08 AM
Replies: 13
Views: 515
Posted By JohnDThompson

You have a Stronglight crank on the Talbot....

You have a Stronglight crank on the Talbot. Six-sided wrench flats on the adjustable cup and eight notches on the lockring indicate English thread:

http://www.os2.dhs.org/~john/bb-cup-markings.jpg...
08-07-19, 01:16 PM
Replies: 83
Views: 7,760
Posted By JohnDThompson

The rider. /thread

The rider.

/thread
08-07-19, 06:38 AM
Replies: 11
Views: 429
Posted By JohnDThompson

Bicycles are component systems, with the only...

Bicycles are component systems, with the only thing the bike manufacturer produces is the frame itself. Every thing else is third-party components whose technical specs and service needs will be...
08-07-19, 06:15 AM
Replies: 51
Views: 1,731
Posted By JohnDThompson

Paul was also working at Trek at the time, and I...

Paul was also working at Trek at the time, and I built him a nice track frame:

http://www.os2.dhs.org/~john/paul/track0010.jpeg
08-06-19, 07:54 PM
Replies: 29
Views: 1,088
Posted By JohnDThompson

Don't do it. Either use a smaller tire or take a...

Don't do it. Either use a smaller tire or take a file to the underside of the fork crown to make some clearance:

https://live.staticflickr.com/2884/9525131639_765a3cb381_z.jpg
Forum: Road Cycling
08-06-19, 07:46 PM
Replies: 4
Views: 323
Posted By JohnDThompson

I've had good luck with 27 x 1-1/4" Paselas, and...

I've had good luck with 27 x 1-1/4" Paselas, and they can be had with a puncture resistant belt.

If you want to go wider, there's the SwiftTire "Sand Canyon" 27 x 1-3/8" tire, but I haven't...
Forum: Framebuilders
08-06-19, 07:30 PM
Replies: 9
Views: 580
Posted By JohnDThompson

Just braze another eyelet on them. That's what we...

Just braze another eyelet on them. That's what we did to get double-eyelet Campagnolo dropouts at Trek.

Nova Cycle Supply has eyelets you can use for this:
...
08-06-19, 08:38 AM
Replies: 51
Views: 1,731
Posted By JohnDThompson

An '84 Trek 760 should handle 28mm wide tires no...

An '84 Trek 760 should handle 28mm wide tires no problem, maybe even 32mm.

What is the seat lug on the OP's bike? If it has the seat stays attached to the sides of the lug, 32mm should be fine....
Forum: Road Cycling
08-06-19, 07:04 AM
Replies: 16
Views: 844
Posted By JohnDThompson

I've only seen them in 700C diameter, but...

I've only seen them in 700C diameter, but Velobase suggests they may have been available in 650C (571mm bead seat diameter) as well:

VeloBase.com - Component: Michelin Hi-Lite Comp...
08-06-19, 06:55 AM
Replies: 13
Views: 445
Posted By JohnDThompson

The mod. 77 lever bodies are a different shape...

The mod. 77 lever bodies are a different shape from the mod. 61/68 lever bodies, so depending on which model Universal level the Rustines have been designed for, the fit may or may not be proper. The...
Forum: Road Cycling
08-05-19, 05:52 PM
Replies: 16
Views: 844
Posted By JohnDThompson

18mm width, FTW. ...

18mm width, FTW.

http://www.os2.dhs.org/~john/700c18.jpg
Forum: Framebuilders
08-05-19, 05:36 PM
Replies: 10
Views: 514
Posted By JohnDThompson

Is it possible? Certainly. But would it be...

Is it possible? Certainly.

But would it be cost-effective? Probably not, unless you do the work yourself. And even then, it would be considerably more effort than simply installing a chain...
08-05-19, 05:18 PM
Replies: 18
Views: 600
Posted By JohnDThompson

Non-ferrous chainstays tend to be wider diameter...

Non-ferrous chainstays tend to be wider diameter than vintage steel chainstays, and further reduce crankarm clearance.
08-05-19, 04:06 PM
Replies: 18
Views: 600
Posted By JohnDThompson

Many modern cranks have curved arms to increase...

Many modern cranks have curved arms to increase chainstay clearance on frames designed for wide (10+ cog) rear clusters. Older cranks designed for use with 5-7 cog clusters have straight arms, which...
08-05-19, 03:28 PM
Replies: 11
Views: 517
Posted By JohnDThompson

I used a kid-back attachment (raised stoker...

I used a kid-back attachment (raised stoker bottom bracket) on our tandem to take my daughter to school before she grew enough to ride her own bike. It was always a big hit with the other kids when I...
08-05-19, 06:38 AM
Replies: 124
Views: 8,414
Posted By JohnDThompson

I worked as a staff RN for a local hospital...

I worked as a staff RN for a local hospital chain, so we were open 24/7/365. If staff couldn't make it in for their shift because of weather, sudden illness, etc. and left the next shift...
08-04-19, 07:57 PM
Replies: 11
Views: 356
Posted By JohnDThompson

Or a 27.2 post and a shim. Less risk of removing...

Or a 27.2 post and a shim. Less risk of removing too much material that way.
08-04-19, 07:46 PM
Replies: 13
Views: 445
Posted By JohnDThompson

AFAIK, they've been out of production for at...

AFAIK, they've been out of production for at least a couple decades. Which is truly a shame, as they have proven to be the most durable hoods I've used. The hoods on those Universal levers are over...
08-04-19, 07:21 PM
Replies: 12
Views: 591
Posted By JohnDThompson

Machined sidewalls are a recent fashion...

Machined sidewalls are a recent fashion preference, not necessarily a requirement for braking. Machining sidewalls became common when hard-anodized rims in various colors became popular; the...
08-04-19, 09:20 AM
Replies: 13
Views: 445
Posted By JohnDThompson

I've had A'me "Modolo"-copy hoods on mod. 77...

I've had A'me "Modolo"-copy hoods on mod. 77 levers for many years. I suspect any Campagnolo-copy hood (Modolo, SunTour Superbe, Rustines, EAI, etc.) would also work.
...
08-04-19, 08:52 AM
Replies: 37
Views: 3,219
Posted By JohnDThompson

Riverndell makes an adapter to convert downtube...

Riverndell makes an adapter to convert downtube levers to handlebar end mounting, but I suspect it would be an exercise in futility to try to go the other way.

Sell the bar-cons and buy a set of...
08-04-19, 07:02 AM
Replies: 31
Views: 1,452
Posted By JohnDThompson

I used these Rivat shoes for about 30 years until...

I used these Rivat shoes for about 30 years until one of the thread inserts holding the cleat failed. They're the most comfortable shoes I've used and I'd still be using them if not for that...
08-04-19, 06:48 AM
Replies: 12
Views: 859
Posted By JohnDThompson

Failure at the disk brake mount suggests that the...

Failure at the disk brake mount suggests that the stays were not sufficiently robust to handle the brake torque. Thicker tubing and/or gussets may have prevented this.
08-03-19, 09:30 PM
Replies: 20
Views: 520
Posted By JohnDThompson

1mm thread spec is not the same as 24tpi thread...

1mm thread spec is not the same as 24tpi thread spec. A Peugeot frame with a cottered crank and 1mm thread is almost certainly "French" thread, and an English/ISO bottom bracket will not work. You...
Showing results 1 to 50 of 1000
 


 
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