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Search: Posts Made By: JohnDThompson
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07-15-19, 12:28 PM
Replies: 8
Views: 121
Posted By JohnDThompson

Saddles are a personal choice; what works for me...

Saddles are a personal choice; what works for me doesn't necessarily work for you. The manufacturer can save a little money by using the same saddle on multiple models, and the dealer can make a...
07-13-19, 04:21 PM
Replies: 22
Views: 642
Posted By JohnDThompson

No worries. the lockring is supported by the cup...

No worries. the lockring is supported by the cup it surrounds, so even an aluminum lockring doesn't get distorted.
07-12-19, 08:51 PM
Replies: 2
Views: 265
Posted By JohnDThompson

Drill them out and replace them with copper...

Drill them out and replace them with copper rivets:

https://www.youtube.com/watch?reload=9&v=NZtRrxsxxao
07-12-19, 08:39 PM
Replies: 4
Views: 370
Posted By JohnDThompson

There is a tool for that BB: ...

There is a tool for that BB:

http://www.os2.dhs.org/~john/suntour-bb-tool.jpg

Fun fact: Phil Wood BB mounting rings will fit the SunTour cartridge, so if you ever want to use it in a frame with...
07-12-19, 08:33 PM
Replies: 42
Views: 1,731
Posted By JohnDThompson

Back in the early 80s, one of my co-workers at...

Back in the early 80s, one of my co-workers at Trek built himself a 12# lugged steel road bike, using all the fancy-pants weight-weenie components of the era: Zeus 2000 cranks and freewheel, Regina...
07-12-19, 05:43 PM
Replies: 22
Views: 642
Posted By JohnDThompson

Have you tried a lockring pliers rather than the...

Have you tried a lockring pliers rather than the hooked spanner? The official lockring pliers from e.g. VAR or Hozan tend to be expensive, but it's fairly trivial to fabricate a functional copy from...
07-12-19, 05:27 PM
Replies: 9
Views: 359
Posted By JohnDThompson

That you have play at some spots but not others...

That you have play at some spots but not others suggests that the bottom bracket shell may need facing. This may or may not solve your clicking problem.
07-12-19, 05:17 PM
Replies: 31
Views: 873
Posted By JohnDThompson

The way Mark Stonich at BikeSmithDesign shortens...

The way Mark Stonich at BikeSmithDesign shortens cranks is to drill and tap a new pedal eye closer to the spindle and then cut off and smooth the excess material along with the old pedal eye. Of...
07-12-19, 09:28 AM
Replies: 48
Views: 81,861
Posted By JohnDThompson

Some cranks do not have clearance for a gear...

Some cranks do not have clearance for a gear puller's arms to reach behind the crank; e.g. low-end MTB cranks with riveted chainrings.
07-12-19, 09:19 AM
Replies: 15
Views: 639
Posted By JohnDThompson

Internal cam skewers have greater mechanical...

Internal cam skewers have greater mechanical advantage than external cam skewers, and since the length of the lever arm is pretty much the same on each, it's harder to clamp an external cam skewer...
Forum: Road Cycling
07-11-19, 06:15 PM
Replies: 13
Views: 573
Posted By JohnDThompson

What benefits are you hoping to enjoy by...

What benefits are you hoping to enjoy by replacing the bike?

FWIW, I still find my 40 year old TS Isaac custom bike to be my preferred ride for century rides and other extended rides.
07-11-19, 02:49 PM
Replies: 5
Views: 302
Posted By JohnDThompson

What crank from what production year are you...

What crank from what production year are you intending to use with this bottom bracket?

http://www.os2.dhs.org/~john/campy-BB-specs.pdf
07-11-19, 02:29 PM
Replies: 9
Views: 1,602
Posted By JohnDThompson

Unless the extra length leads to a clearance...

Unless the extra length leads to a clearance problem somewhere, this is just a cosmetic issue.
07-11-19, 06:27 AM
Replies: 10
Views: 422
Posted By JohnDThompson

753 shouldn't be cold-set. Any reshaping of the...

753 shouldn't be cold-set. Any reshaping of the tubes needs to be done prior to heat treatment. Reynolds even shipped the fork blades pre-raked for that reason.

We tried to cold set a crashed team...
Forum: Road Cycling
07-10-19, 03:26 PM
Replies: 33
Views: 1,757
Posted By JohnDThompson

Thank you for your pedantry. Consider me properly...

Thank you for your pedantry. Consider me properly chastised.
07-09-19, 08:36 PM
Replies: 14
Views: 422
Posted By JohnDThompson

Is there a spacer on the non-drive-side you could...

Is there a spacer on the non-drive-side you could move to the drive side? Failing that, a thinner locknut and a spacer added to the drive side? Both these would call for re-dishing the wheel.
07-09-19, 11:09 AM
Replies: 7
Views: 412
Posted By JohnDThompson

It's possible the manufacturer or distributor...

It's possible the manufacturer or distributor would replace it. I had a plastic "Planet Bike" fender break, took it to the LBS, they gave the shards to the distributor, and a week later I had a new...
07-09-19, 06:43 AM
Replies: 31
Views: 873
Posted By JohnDThompson

TA "Carmina" cranks are available in 155mm,...

TA "Carmina" cranks are available in 155mm, 160mm, 162.5mm, 165mm, 167.5mm, 170mm, 172.5mm, 175mm, 177.5mm and 180mm lengths, but somewhat outside your $200 limit.
...
Forum: Road Cycling
07-08-19, 05:58 PM
Replies: 33
Views: 1,757
Posted By JohnDThompson

I'm not a fan of gel shorts. I prefer a thin...

I'm not a fan of gel shorts. I prefer a thin chamois, just enough to wick away sweat and prevent chaffing.
07-08-19, 05:26 PM
Replies: 20,981
Views: 2,020,388
Posted By JohnDThompson

I have several SW hubs here. The nice thing about...

I have several SW hubs here. The nice thing about them is they have fewer internal parts than the AW (and no fiddly pawl springs to go missing), so they're dead-easy to overhaul. The springless pawls...
07-06-19, 06:12 PM
Replies: 3
Views: 441
Posted By JohnDThompson

Yes, priced to move.

Yes, priced to move.
07-06-19, 12:26 PM
Replies: 3
Views: 441
Posted By JohnDThompson

Bottecchia f/f

64cm Bottecchia "Special" frame and fork. Ofmega headset included. US$25 plus shipping:

http://www.os2.dhs.org/~john/riverview/bottecchia/20190706_093557.jpg
...
07-05-19, 01:40 PM
Replies: 63
Views: 2,091
Posted By JohnDThompson

The formula will work with any units you want, as...

The formula will work with any units you want, as long as you're consistent throughout. E.g. don't measure the rim radius in inches and the hub radius in millimeters and expect it to work. Pick one...
07-05-19, 12:49 PM
Replies: 5
Views: 326
Posted By JohnDThompson

Wow. Made his own lugs and components even. I...

Wow. Made his own lugs and components even. I feel like a slacker.
07-05-19, 12:41 PM
Replies: 1,349
Views: 80,350
Posted By JohnDThompson

Whew! A lot of work for that! As you might...

Whew! A lot of work for that!

As you might expect, VAR does make a thin-profile wrench for that purpose:

http://www.os2.dhs.org/~john/var19.jpg
07-05-19, 12:27 PM
Replies: 13,455
Views: 2,681,732
Posted By JohnDThompson

The only thing wrong with the Y-foil is that UCI...

The only thing wrong with the Y-foil is that UCI forbade its use in sanctioned events. Not the bike's fault.
07-04-19, 11:37 AM
Replies: 63
Views: 2,091
Posted By JohnDThompson

The easy way is to use one of the on-line spoke...

The easy way is to use one of the on-line spoke length calculators, or download the spocalc.xls spreadsheet, find your hub and rim in the database, decide on a cross pattern, and let the software do...
07-04-19, 06:48 AM
Replies: 27
Views: 663
Posted By JohnDThompson

My July 4 ride & kit. Frame was built in 1979 in...

My July 4 ride & kit. Frame was built in 1979 in Boulder CO for the 1980 US Olympic cycling team.

http://www.os2.dhs.org/~john/july-4.jpg
07-03-19, 09:36 PM
Replies: 31
Views: 893
Posted By JohnDThompson

Yeah, but the Campagnolo offset wrench and the...

Yeah, but the Campagnolo offset wrench and the various clones thereof are far from ideal.

The Campagnolo two-bolt post (and its various clones) is one of my favorites, but the preferred tool to...
07-03-19, 09:06 PM
Replies: 50
Views: 2,176
Posted By JohnDThompson

I only have one bike with a kickstand, a 1972...

I only have one bike with a kickstand, a 1972 Raleigh Superbe I use as a city bike. But I do wear a helmet when I ride it.
07-03-19, 04:30 PM
Replies: 5
Views: 335
Posted By JohnDThompson

FWIW, Nikko one-piece, bulge-formed headtube/head...

FWIW, Nikko one-piece, bulge-formed headtube/head lug frame fittings were pretty widely used on mid-level Japanese frames.
07-03-19, 04:24 PM
Replies: 9
Views: 515
Posted By JohnDThompson

Having worked in bicycle manufacturing, I can say...

Having worked in bicycle manufacturing, I can say that there are many reasons why a new bike may not exactly match the catalog description: parts shortages, hold-ups in customs, unacceptable quality...
07-03-19, 06:32 AM
Replies: 40
Views: 1,677
Posted By JohnDThompson

I suspect those are a result of poorly-trained...

I suspect those are a result of poorly-trained department store bike assemblers. When bikes are shipped, the forks are usually turned backwards to allow use of a smaller box. The assembler probably...
07-02-19, 07:23 PM
Replies: 17
Views: 527
Posted By JohnDThompson

I was thinking more like this one (yer comin' out...

I was thinking more like this one (yer comin' out bolt; I don't take "no" for an answer):
...
07-02-19, 05:53 PM
Replies: 34
Views: 1,152
Posted By JohnDThompson

Ouch! I'd think those serrated jaws would really...

Ouch! I'd think those serrated jaws would really chew up the soft aluminum headset parts; that's why Shimano designed those scalloped wrenches in the first place, to minimize damage to the headset.
...
07-02-19, 05:07 PM
Replies: 1
Views: 352
Posted By JohnDThompson

The cartridge seals create some drag, which may...

The cartridge seals create some drag, which may be what you're feeling. Seal drag is utterly insignificant under load and as the shop said, over time the seals will wear in and the spindle will...
07-01-19, 07:38 PM
Replies: 17
Views: 836
Posted By JohnDThompson

Well, those of us who survived are, anyway....

Well, those of us who survived are, anyway. :innocent:
07-01-19, 07:28 PM
Replies: 1
Views: 231
Posted By JohnDThompson

Is this a Record triple, for which the...

Is this a Record triple, for which the 830/831/832 bolt set is used? If so, triple bolt sets from Stronglight or Sakae Ringyo triple cranks might work, and I may have a set you can try.
...
07-01-19, 06:43 PM
Replies: 27
Views: 789
Posted By JohnDThompson

Replace it. Check to see if the manufacturer has...

Replace it. Check to see if the manufacturer has a crash replacement policy. I know Bell does, and I was able to replace my crashed helmet at a substantial discount.
Forum: Road Cycling
06-30-19, 12:19 PM
Replies: 14
Views: 576
Posted By JohnDThompson

In principle, friction shifting will work...

In principle, friction shifting will work regardless of the number of cogs it has to cross. In practice, it's a little more complicated. The shifter barrel has to be big enough to pull enough cable...
06-30-19, 09:42 AM
Replies: 11
Views: 481
Posted By JohnDThompson

I've rebuilt Phil Wood cartridges. I don't think...

I've rebuilt Phil Wood cartridges. I don't think the Shimano UN series, YST, Tange, etc. cartridges are worth the bother; it's cheap enough to just replace them when they die.
06-29-19, 12:08 PM
Replies: 30
Views: 1,509
Posted By JohnDThompson

The only reason you don't see quick releases on...

The only reason you don't see quick releases on track wheels is because track regulations often forbid them out of concern that a closely-following rider's front wheel could disengage the lead...
06-29-19, 06:16 AM
Replies: 17
Views: 527
Posted By JohnDThompson

Maybe the #24 "Special key for 5 pins chainwheel...

Maybe the #24 "Special key for 5 pins chainwheel bolts?"

I confess I've never seen this tool in the flesh.

http://www.os2.dhs.org/~john/ta-toolkit.jpg
06-28-19, 08:42 PM
Replies: 8
Views: 395
Posted By JohnDThompson

Without the keyed washer, you must take extra...

Without the keyed washer, you must take extra care that tightening the top lock nut doesn't affect the headset adjustment.

That's it.
06-27-19, 05:34 PM
Replies: 13
Views: 465
Posted By JohnDThompson

Yeah, wrong spindle. 80s era Super Record used an...

Yeah, wrong spindle. 80s era Super Record used an asymmetrical spindle.
06-27-19, 05:30 PM
Replies: 25
Views: 1,979
Posted By JohnDThompson

Never shave with a bulldozer. And never try...

Never shave with a bulldozer.

And never try to move a pile of dirt with a razor.
06-27-19, 04:35 PM
Replies: 28
Views: 1,120
Posted By JohnDThompson

Jan Heine has suggested that a roller bearing...

Jan Heine has suggested that a roller bearing headset like the Stronglight A9 can dampen shimmy.
06-27-19, 04:31 PM
Replies: 24
Views: 657
Posted By JohnDThompson

How 'bout a "Jeff Bumby?" ...

How 'bout a "Jeff Bumby?"

http://www.os2.dhs.org/~john/bumby/2018.jpg
06-27-19, 07:32 AM
Replies: 7
Views: 425
Posted By JohnDThompson

Those MKS pedal dustcaps will fit a variety of...

Those MKS pedal dustcaps will fit a variety of other pedals, including Campagnolo, Zeus, Gipiemme, Ofmega, Kyokuto, and possibly others. But the French are notorious for doing things differently, and...
06-26-19, 09:16 PM
Replies: 28
Views: 1,120
Posted By JohnDThompson

Not sure how a stem change could induce a...

Not sure how a stem change could induce a no-hands shimmy. I suspect something else is the cause.

FWIW, I just changed a 95mm SR Royal stem to an 80mm Technomic with no shimmy problems.
Showing results 1 to 50 of 1000
 


 
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