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Possible to get a low spot out of a TUBULAR tire?



 
 
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  #11  
Old September 4th 19, 09:16 AM posted to rec.bicycles.tech
Chalo
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Default Possible to get a low spot out of a TUBULAR tire?

John B. wrote:
Maybe like them old guys riding those pedal bikes things when e-bikes
are just so much better - carry more, go faster, etc. :-)


Sure, I can get on board with that thinking. But when limiting the concern to scrupulously human powered contrivances only, I think time spent dicking around with your tires should most definitely count towards elapsed times.. Including such nonsense would expose both tubies and tubeless for the losing propositions they are.
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  #12  
Old September 4th 19, 09:51 AM posted to rec.bicycles.tech
jOHN b.
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Default Possible to get a low spot out of a TUBULAR tire?

On Wed, 4 Sep 2019 01:16:34 -0700 (PDT), Chalo
wrote:

John B. wrote:
Maybe like them old guys riding those pedal bikes things when e-bikes
are just so much better - carry more, go faster, etc. :-)


Sure, I can get on board with that thinking. But when limiting the concern to scrupulously human powered contrivances only, I think time spent dicking around with your tires should most definitely count towards elapsed times. Including such nonsense would expose both tubies and tubeless for the losing propositions they are.


But can you ignore human nature? You give a guy a pair of shoes and
damned if he doesn't start begging for a bicycle and as soon as he
gets the bicycle he wants motor assistance.

Sooner or later he gets motor assistance and then it is a car and soon
after the car he wants a Mercedes. Never happy, these people.
--
cheers,

John B.

  #13  
Old September 4th 19, 01:38 PM posted to rec.bicycles.tech
AMuzi
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Default Possible to get a low spot out of a TUBULAR tire?

On 9/3/2019 9:29 PM, Oculus Lights wrote:
On Monday, September 2, 2019 at 5:50:33 PM UTC-7, Sir Ridesalot wrote:
I just bought a used bicycle that has tubular tires on it. pparently it has sat for awhile as the rear tire has a low flat spot. NOTE this low spot is DEFIINTELY ON THE TIRE not on the rim which is true. Is there any way to get rid of this low spot on the tire caused by it sitting for some time? I've ridden the tire about 30 kilometers but there's been no change in that low flat spot.

Oh,it's definitely a low spot on the tire from sitting and not from improper mounting. The base of the tire is fine.

Cheers


Sounds like to tire sunk into the trough in the rim where the tire was touching the ground.
Remove the tire, let it sit with ~60psi/ 4 bar for a day, add another coat of glue and remount. Pump up to low pressure so the tire still compresses 1/2way when you lean on it, roll the tire on the floor for a a few dozen rotations or more to even the tire out all the way around. Pump up to riding pressure and enjoy.


Trough? What trough?

http://www.yellowjersey.org/photosfr...st/rimsect.jpg

--
Andrew Muzi
www.yellowjersey.org/
Open every day since 1 April, 1971


  #14  
Old September 4th 19, 01:44 PM posted to rec.bicycles.tech
AMuzi
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Default Possible to get a low spot out of a TUBULAR tire?

On 9/4/2019 2:11 AM, Chalo wrote:
AMuzi wrote:

Road tubulars are so cheap now I don't cry over them.


Any sewup tire these days is such egregious folly that it makes me want to cry. Might as well take the Angry Samoans' advice and poke your eyes out.

Tubeless is the up-to-date way to waste your time, make a mess, and be stupid.


Like the cleft between men who like skinny girls and those
who prefer zaftig, there's no way to bridge your comments to
my experience.

As we say on RBT, YMMV and likely will.

--
Andrew Muzi
www.yellowjersey.org/
Open every day since 1 April, 1971


  #15  
Old September 4th 19, 03:04 PM posted to rec.bicycles.tech
JBeattie
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Default Possible to get a low spot out of a TUBULAR tire?

On Wednesday, September 4, 2019 at 12:11:50 AM UTC-7, Chalo wrote:
AMuzi wrote:

Road tubulars are so cheap now I don't cry over them.


Any sewup tire these days is such egregious folly that it makes me want to cry. Might as well take the Angry Samoans' advice and poke your eyes out..

Tubeless is the up-to-date way to waste your time, make a mess, and be stupid.


It's not that onerous, and actually, you can change a tubular pretty quickly -- although you don't want to be doing hard cornering on a hot day with an old-glue spare. Tubular repair, however, is a PITA, and for me, very produced a perfectly round repaired tire.

-- Jay Beattie.
  #16  
Old September 4th 19, 07:44 PM posted to rec.bicycles.tech
Sir Ridesalot
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Default Possible to get a low spot out of a TUBULAR tire?

On Wednesday, 4 September 2019 03:11:50 UTC-4, Chalo wrote:
AMuzi wrote:

Road tubulars are so cheap now I don't cry over them.


Any sewup tire these days is such egregious folly that it makes me want to cry. Might as well take the Angry Samoans' advice and poke your eyes out.

Tubeless is the up-to-date way to waste your time, make a mess, and be stupid.


Please do not hijack threads. This thread is about getting a flat spot out of a tubular tire that's glued onto the rim.

Cheers
  #17  
Old September 4th 19, 08:21 PM posted to rec.bicycles.tech
JBeattie
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Default Possible to get a low spot out of a TUBULAR tire?

On Monday, September 2, 2019 at 5:58:59 PM UTC-7, AMuzi wrote:
On 9/2/2019 7:50 PM, Sir Ridesalot wrote:
I just bought a used bicycle that has tubular tires on it. pparently it has sat for awhile as the rear tire has a low flat spot. NOTE this low spot is DEFIINTELY ON THE TIRE not on the rim which is true. Is there any way to get rid of this low spot on the tire caused by it sitting for some time? I've ridden the tire about 30 kilometers but there's been no change in t hat low flat spot.

Oh,it's definitely a low spot on the tire from sitting and not from improper mounting. The base of the tire is fine.

Cheers


Might reform itself if you leave it fully inflated but then
again it might not.
More hopeful with a nylon casing (Panaracer) less likely in
natural cotton (almost everybody else).

Road tubulars are so cheap now I don't cry over them.


How does a tubular develop a flat spot? The only time I had flat spots was when I did a poor repair. I would get hops with a poorly glued tire, particularly at the stem.

-- Jay Beattie.
  #18  
Old September 4th 19, 08:28 PM posted to rec.bicycles.tech
Sir Ridesalot
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Default Possible to get a low spot out of a TUBULAR tire?

On Wednesday, 4 September 2019 15:21:20 UTC-4, jbeattie wrote:
On Monday, September 2, 2019 at 5:58:59 PM UTC-7, AMuzi wrote:
On 9/2/2019 7:50 PM, Sir Ridesalot wrote:
I just bought a used bicycle that has tubular tires on it. pparently it has sat for awhile as the rear tire has a low flat spot. NOTE this low spot is DEFIINTELY ON THE TIRE not on the rim which is true. Is there any way to get rid of this low spot on the tire caused by it sitting for some time? I've ridden the tire about 30 kilometers but there's been no change in t hat low flat spot.

Oh,it's definitely a low spot on the tire from sitting and not from improper mounting. The base of the tire is fine.

Cheers


Might reform itself if you leave it fully inflated but then
again it might not.
More hopeful with a nylon casing (Panaracer) less likely in
natural cotton (almost everybody else).

Road tubulars are so cheap now I don't cry over them.


How does a tubular develop a flat spot? The only time I had flat spots was when I did a poor repair. I would get hops with a poorly glued tire, particularly at the stem.

-- Jay Beattie.


I wonder if the flat spot on my tubular tire was caused by sitting in one spot for many years? The bicycle is a FIORI Venezia and it has a complete Campagnolo groupset on it.

Cheers
  #19  
Old September 4th 19, 10:16 PM posted to rec.bicycles.tech
AMuzi
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Posts: 10,700
Default Possible to get a low spot out of a TUBULAR tire?

On 9/4/2019 2:21 PM, jbeattie wrote:
On Monday, September 2, 2019 at 5:58:59 PM UTC-7, AMuzi wrote:
On 9/2/2019 7:50 PM, Sir Ridesalot wrote:
I just bought a used bicycle that has tubular tires on it. pparently it has sat for awhile as the rear tire has a low flat spot. NOTE this low spot is DEFIINTELY ON THE TIRE not on the rim which is true. Is there any way to get rid of this low spot on the tire caused by it sitting for some time? I've ridden the tire about 30 kilometers but there's been no change in t hat low flat spot.

Oh,it's definitely a low spot on the tire from sitting and not from improper mounting. The base of the tire is fine.

Cheers


Might reform itself if you leave it fully inflated but then
again it might not.
More hopeful with a nylon casing (Panaracer) less likely in
natural cotton (almost everybody else).

Road tubulars are so cheap now I don't cry over them.


How does a tubular develop a flat spot? The only time I had flat spots was when I did a poor repair. I would get hops with a poorly glued tire, particularly at the stem.

-- Jay Beattie.


Two different things.
Sir's lump is likely from sitting flat for many years.
Think slacks with 'Permanent Press' creases. Like that.

Drawing your thread with uneven tension is likely what you
experienced. I have lumpy scars like that from home sewing
(although I also have some really nice straight scars when I
paid better attention)

--
Andrew Muzi
www.yellowjersey.org/
Open every day since 1 April, 1971


  #20  
Old September 11th 19, 10:46 PM posted to rec.bicycles.tech
Sir Ridesalot
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Posts: 4,490
Default Possible to get a low spot out of a TUBULAR tire?

On Wednesday, 4 September 2019 17:16:39 UTC-4, AMuzi wrote:
On 9/4/2019 2:21 PM, jbeattie wrote:
On Monday, September 2, 2019 at 5:58:59 PM UTC-7, AMuzi wrote:
On 9/2/2019 7:50 PM, Sir Ridesalot wrote:
I just bought a used bicycle that has tubular tires on it. pparently it has sat for awhile as the rear tire has a low flat spot. NOTE this low spot is DEFIINTELY ON THE TIRE not on the rim which is true. Is there any way to get rid of this low spot on the tire caused by it sitting for some time? I've ridden the tire about 30 kilometers but there's been no change in t hat low flat spot.

Oh,it's definitely a low spot on the tire from sitting and not from improper mounting. The base of the tire is fine.

Cheers


Might reform itself if you leave it fully inflated but then
again it might not.
More hopeful with a nylon casing (Panaracer) less likely in
natural cotton (almost everybody else).

Road tubulars are so cheap now I don't cry over them.


How does a tubular develop a flat spot? The only time I had flat spots was when I did a poor repair. I would get hops with a poorly glued tire, particularly at the stem.

-- Jay Beattie.


Two different things.
Sir's lump is likely from sitting flat for many years.
Think slacks with 'Permanent Press' creases. Like that.

Drawing your thread with uneven tension is likely what you
experienced. I have lumpy scars like that from home sewing
(although I also have some really nice straight scars when I
paid better attention)

--
Andrew Muzi
www.yellowjersey.org/
Open every day since 1 April, 1971


I replaced that tire after having a good look at it. If I ever by tubular wheels with a tire installed I'll remove the tire to check how it was glued. Obviously this tire wasn't glued on properly which is probable a big contributor to the flat spot and bump on the tire. What wasn't obvious is that the base tape was completely separated from the tire. All that was holding this tire on the rim was the air pressure in it.

Moral of the story? Inspect all tires carefully before riding them if buying them used on a bike.

Here's an image of the tire before removing it from the rim.

https://flic.kr/p/2he7TPa

I'm cutting it in half before throwing it out. I don't want someone else trying to use it.

Cheers
 




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