Search
Notices
Classic & Vintage This forum is to discuss the many aspects of classic and vintage bicycles, including musclebikes, lightweights, middleweights, hi-wheelers, bone-shakers, safety bikes and much more.

Saboteurs !

Thread Tools
 
Search this Thread
 
Old 07-28-13 | 08:55 PM
  #26  
dddd's Avatar
Ride, Wrench, Swap, Race
15 Anniversary
 
Joined: Jan 2010
Posts: 9,813
Likes: 1,790
From: Northern California

Bikes: Cheltenham-Pedersen racer, Boulder F/S Paris-Roubaix, Varsity racer, '52 Christophe, '62 Continental, '92 Merckx, '75 Limongi, '76 Presto, '72 Gitane SC, '71 Schwinn SS, etc.

It sounds like the same Supercourse curse that plagued my '77 SC with Weinmann Concave rims and ever-flat tires.

The bike was stolen in early-1979, it was orange, about 23". Maybe the same bike?

I thought I had the problem licked after discovering machining burrs inside the rim cavity from post-wheelbuild spoke shortening (done at the factory!). I filed and sanded the entire periphery of the rim's internal hollow bumps, but if this is the same bike, perhaps it wasn't enough?

So, it's a Raleigh, so first I'd check that no spoke length adjustments were done with a grinding wheel, post-build.

The Raleigh SuperCurse.
dddd is offline  
Reply
Old 07-28-13 | 09:46 PM
  #27  
Wildwood's Avatar
Senior Member
Titanium Club Membership
20 Anniversary
Community Builder
Community Influencer
 
Joined: Dec 2004
Posts: 15,375
Likes: 8,290
From: Seattle area

Bikes: Bikes??? Thought this was social media?!?

A flat tire - what's that?
__________________
Vintage, modern, e-road. It is a big cycling universe.
Wildwood is offline  
Reply
Old 07-29-13 | 04:08 AM
  #28  
Senior Member
 
Joined: Nov 2012
Posts: 494
Likes: 11
From: Scotland (UK)

Bikes: 2015 B'TWIN Triban 500se 2011 Nox Airbase 1995 Giant Team Bike, 1990's Specialized Hardrock.

Originally Posted by 16Victor
There's something to this. Seriously.

Or maybe I go to Tire Discounters and fill with nitrogen. It has to be better than the 80% nitrogen that God gives us, right?
It has to be Xenon gas to protect from aliens.
aidanpringle is offline  
Reply
Old 07-29-13 | 05:08 AM
  #29  
Sixty Fiver's Avatar
Bicycle Repair Man !!!
 
Joined: Sep 2007
Posts: 27,266
Likes: 150
From: YEG

Bikes: See my sig...

gremlins.
Sixty Fiver is offline  
Reply
Old 07-29-13 | 05:30 AM
  #30  
jimmuller's Avatar
What??? Only 2 wheels?
Titanium Club Membership
15 Anniversary
 
Joined: Apr 2010
Posts: 13,496
Likes: 940
From: Boston-ish, MA

Bikes: 72 Peugeot UO-8, 82 Peugeot TH8, 87 Bianchi Brava, 76? Masi Grand Criterium, 74 Motobecane Champion Team, 86 & 77 Gazelle champion mondial, 81? Grandis, 82? Tommasini, 83 Peugeot PF10

Originally Posted by dddd
...so first I'd check that no spoke length adjustments were done...
I've gone for years without doing any spoke length adjustment. Should I be worried?
__________________
Real cyclists use toe clips.
With great bikes comes great responsibility.
jimmuller
jimmuller is offline  
Reply
Old 07-29-13 | 06:19 AM
  #31  
The Golden Boy's Avatar
Extraordinary Magnitude
Titanium Club Membership
15 Anniversary
 
Joined: Aug 2009
Posts: 14,081
Likes: 2,135
From: Waukesha WI

Bikes: 1978 Trek TX700; 1978/79 Trek 736; 1984 Specialized Stumpjumper Sport; 1984 Schwinn Voyageur SP; 1985 Trek 620; 1985 Trek 720; 1986 Trek 400 Elance; 1987 Schwinn High Sierra; 1990 Miyata 1000LT

Snookie.
__________________
*Recipient of the 2006 Time Magazine "Person Of The Year" Award*

Commence to jigglin’ huh?!?!

"But hey, always love to hear from opinionated amateurs." -says some guy to Mr. Marshall.
The Golden Boy is offline  
Reply
Old 07-29-13 | 06:25 AM
  #32  
Velognome's Avatar
Get off my lawn!
Titanium Club Membership
15 Anniversary
 
Joined: Nov 2010
Posts: 6,035
Likes: 118
From: The Garden State

Bikes: 1917 Loomis, 1923 Rudge, 1930 Hercules Renown, 1947 Mclean, 1948 JA Holland, 1955 Hetchins, 1957 Carlton Flyer, 1962 Raleigh Sport, 1978&81 Raleigh Gomp GS', 2010 Raliegh Clubman

Obvioulsy the work of FAFA, aka "Free Air For All". I've heard about them freeing captive air from birthday balloons, GI tracts and occasional beach balls....but really, bicycle tires....now they've gone to far!
Velognome is offline  
Reply
Old 07-29-13 | 07:24 AM
  #33  
auchencrow's Avatar
Thread Starter
Senior Member
 
Joined: Apr 2009
Posts: 10,303
Likes: 60
From: Detroit
Three Batmans and only one kid gets stuck being Robin? What is that?
__________________
- Auchen
auchencrow is offline  
Reply
Old 07-29-13 | 07:27 AM
  #34  
auchencrow's Avatar
Thread Starter
Senior Member
 
Joined: Apr 2009
Posts: 10,303
Likes: 60
From: Detroit
Originally Posted by dddd
It sounds like the same Supercourse curse that plagued my '77 SC with Weinmann Concave rims and ever-flat tires.

The bike was stolen in early-1979, it was orange, about 23". Maybe the same bike?

I thought I had the problem licked after discovering machining burrs inside the rim cavity from post-wheelbuild spoke shortening (done at the factory!). I filed and sanded the entire periphery of the rim's internal hollow bumps, but if this is the same bike, perhaps it wasn't enough?

So, it's a Raleigh, so first I'd check that no spoke length adjustments were done with a grinding wheel, post-build.

The Raleigh SuperCurse.
That really sounds plausible and may account for some, but truly - this phenomenon is not limited to Raleigh or even post-build shortening of spokes.
(I never could comprehend how they allowed that on Factory-built wheels!)
__________________
- Auchen
auchencrow is offline  
Reply
Old 07-29-13 | 07:51 AM
  #35  
himespau's Avatar
Senior Member
Titanium Club Membership
15 Anniversary
Community Builder
 
Joined: Jun 2008
Posts: 13,765
Likes: 3,937
From: Louisville, KY
Have you been resting your elbows on your table while eating again? You know that kills table fairies, don't you? You kill enough and the other fairies might be deciding to take revenge with pins.
__________________
Bikes: 1996 Eddy Merckx Titanium EX, 1989/90 Colnago Super(issimo?) Piu(?), 1990 Concorde Aquila(hit by car while riding), others in build queue "when I get the time"





himespau is offline  
Reply
Old 07-29-13 | 09:48 AM
  #36  
dddd's Avatar
Ride, Wrench, Swap, Race
15 Anniversary
 
Joined: Jan 2010
Posts: 9,813
Likes: 1,790
From: Northern California

Bikes: Cheltenham-Pedersen racer, Boulder F/S Paris-Roubaix, Varsity racer, '52 Christophe, '62 Continental, '92 Merckx, '75 Limongi, '76 Presto, '72 Gitane SC, '71 Schwinn SS, etc.

Originally Posted by auchencrow
That really sounds plausible and may account for some, but truly - this phenomenon is not limited to Raleigh or even post-build shortening of spokes.
(I never could comprehend how they allowed that on Factory-built wheels!)

Heh, on one Benotto I bought (in unused condition), the overlengthed spokes were left protruding 4-5 millimeters, poking up through (drumroll) Benotto striped handlebar tape installed at their factory.

And I've also seen wheels from Japan and elsewhere where the spoke and nipple itself showed heavy grinding, leaving razor-sharp edges that would readily cut through the rubber rim tape, especially if any spoke nipples were turned with the tire installed and inflated.
The Supercourse wheels were unique in that the grinding had obviously been done with the wheels rotating, lathe-style, and fixing all those flats was maddening.
Having the bike stolen (only shortly after the problem was finally discovered and fixed) was beyond maddening.
dddd is offline  
Reply
Old 07-29-13 | 10:14 AM
  #37  
Phil_gretz's Avatar
Zip tie Karen
 
Joined: Aug 2009
Posts: 7,005
Likes: 1,546
From: Fair Oaks Ranch, TX

Bikes: '13 Motobecane Fantom29 HT, '16 Motobecane Turino Pro Disc, '18 Velobuild VB-R-022, '21 Tsunami SNM-100

I'm voting for the wife also. Means, Opportunity. Motive.

Your wife, in the garage, with a hairpin.

Search her immediately. She may be hiding the hairpin in her mouth. Sarah Connor escaped from a mental hospital using only a paper clip. I saw it. That, and a syringe full of antifreeze, and a nightstick, and a cybernetic organism who had befriended her estranged son...
Phil_gretz is offline  
Reply
Old 07-29-13 | 09:00 PM
  #38  
3alarmer's Avatar
Senior Member
 
Joined: Nov 2010
Posts: 22,994
Likes: 10,496
From: Sacramento, CA

Bikes: old ones

..........it's just you. My tires never go flat. And even if they did, it's just you.
3alarmer is offline  
Reply
Old 07-29-13 | 09:22 PM
  #39  
jimmuller's Avatar
What??? Only 2 wheels?
Titanium Club Membership
15 Anniversary
 
Joined: Apr 2010
Posts: 13,496
Likes: 940
From: Boston-ish, MA

Bikes: 72 Peugeot UO-8, 82 Peugeot TH8, 87 Bianchi Brava, 76? Masi Grand Criterium, 74 Motobecane Champion Team, 86 & 77 Gazelle champion mondial, 81? Grandis, 82? Tommasini, 83 Peugeot PF10

With just the right amount of air your tires will be flat only on the bottom.
__________________
Real cyclists use toe clips.
With great bikes comes great responsibility.
jimmuller
jimmuller is offline  
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
rmfnla
General Cycling Discussion
68
03-31-17 04:03 PM
tiras25
General Cycling Discussion
6
09-01-16 09:46 AM
50voltphantom
Commuting
12
07-10-14 12:12 AM
auchencrow
Classic & Vintage
11
10-01-11 04:45 AM
Hank244
Road Cycling
3
09-20-10 11:29 PM

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service -

Copyright © 2026 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.