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2 punctures in one ride



 
 
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  #11  
Old June 15th 11, 09:36 PM posted to aus.bicycle
John Henderson
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Posts: 413
Default 2 punctures in one ride

Geoff Lock wrote:

Might have a read of what others say elsewhere about solids. Anybody in
this newsgroup who has used solids and cares to impart some life
experiences?


Sheldon Brown said this:

"Airless tires have been obsolete for over a century, but
crackpot "inventors" keep trying to bring them back. They are
heavy, slow and give a harsh ride. They are also likely to cause
wheel damage, due to their poor cushioning ability."

http://sheldonbrown.com/tires.html

John
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  #12  
Old June 16th 11, 03:04 AM posted to aus.bicycle
Rob
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Posts: 107
Default 2 punctures in one ride

On 16/06/2011 2:31 AM, Geoff Lock wrote:
On 15/06/2011 9:50 PM, Rob wrote:
On 15/06/2011 4:46 AM, Geoff Lock wrote:


I think I'll rip off the tyres from me other bike .... should have done
that in the first place... hhmmmm...


Solid tyres should fix that problem!


Hm, now that you mentioned them, I had a google and, of cos, they are
available. I have always known of solid tyres on forklifts and those
solid forklift tyres weigh more than a few grams


Better than pushing your bike home!

Might have a read of what others say elsewhere about solids. Anybody in
this newsgroup who has used solids and cares to impart some life
experiences?


At one stage the water board had rubber rings about 1"dia to seal the
watermain pipes, off hand the 20" (or the like) did fit tightly when
stretched on the rim - it doesn't take much increase in circumference to
expand to 700 or 27" rims.
  #13  
Old June 16th 11, 03:54 AM posted to aus.bicycle
terryc
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Posts: 134
Default 2 punctures in one ride

Geoff Lock wrote:

Hm, now that you mentioned them, I had a google and, of cos, they are
available. I have always known of solid tyres on forklifts and those
solid forklift tyres weigh more than a few grams


at one stage a few decades ago someone promoted the idea of filling the
tyre with expanding foam. The idea being no punctures. Major problem was
low speed limitations, like 30kms/hr. i suspect the other problem was
recovery cycles were too low as I never saw it on the market.
  #14  
Old June 16th 11, 04:02 AM posted to aus.bicycle
F Murtz[_2_]
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Posts: 193
Default 2 punctures in one ride

terryc wrote:
Geoff Lock wrote:

Hm, now that you mentioned them, I had a google and, of cos, they are
available. I have always known of solid tyres on forklifts and those
solid forklift tyres weigh more than a few grams


at one stage a few decades ago someone promoted the idea of filling the
tyre with expanding foam. The idea being no punctures. Major problem was
low speed limitations, like 30kms/hr. i suspect the other problem was
recovery cycles were too low as I never saw it on the market.



used to fill them with grass during the depression.
  #15  
Old June 16th 11, 06:18 AM posted to aus.bicycle
Geoff Lock[_2_]
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Posts: 475
Default 2 punctures in one ride

On 16/06/2011 6:11 AM, Zebee Johnstone wrote:
In aus.bicycle on Thu, 16 Jun 2011 02:31:23 +1000
Geoff Lockglock@home wrote:
On 15/06/2011 9:50 PM, Rob wrote:
On 15/06/2011 4:46 AM, Geoff Lock wrote:


I think I'll rip off the tyres from me other bike .... should have done
that in the first place... hhmmmm...


Solid tyres should fix that problem!


Might have a read of what others say elsewhere about solids. Anybody in
this newsgroup who has used solids and cares to impart some life
experiences?


The ones on my single speed coaster brake 20" bike had big chunks out
of them without seeming to cause any problems, and that bike went down
steps OK.


Yeah, solids take punishment.

I did find when graduating to a big girl's bike (still a single
speed but with big wheels and pump up tyres) that it was faster and
more comfortable, but that might also have been the bigger wheels and
the sprung saddle.


Would also probably depend on the tyre pressures too, I guess.

Wasn't as good at riding down steps though.


Heheheheh! Bloody pneumatics
  #16  
Old June 16th 11, 06:36 AM posted to aus.bicycle
Geoff Lock[_2_]
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Posts: 475
Default 2 punctures in one ride

On 16/06/2011 6:36 AM, John Henderson wrote:
Geoff Lock wrote:

Might have a read of what others say elsewhere about solids. Anybody in
this newsgroup who has used solids and cares to impart some life
experiences?


Sheldon Brown said this:

"Airless tires have been obsolete for over a century, but
crackpot "inventors" keep trying to bring them back. They are
heavy, slow and give a harsh ride. They are also likely to cause
wheel damage, due to their poor cushioning ability."

http://sheldonbrown.com/tires.html


Hm, I did have some of me own "crackpot" ideas until I read Sheldon
Brown's comments.

I am not sure when Brown wrote that article but maybe there is some
kinda new magicky foam which is hard on the outside and goes
progressively softer towards the middle or something like that.

Notwithstanding the above magic foam, Brown's further comments seem to
present a challenge to ANY foam tyre, ie " .. a pneumatic tire uses all
of the air in the whole tube as a shock absorber, while foam-type
"airless" tires/tubes only use the air in the immediate area of impact."
  #17  
Old June 16th 11, 06:41 AM posted to aus.bicycle
Geoff Lock[_2_]
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Posts: 475
Default 2 punctures in one ride

On 16/06/2011 12:04 PM, Rob wrote:
On 16/06/2011 2:31 AM, Geoff Lock wrote:
On 15/06/2011 9:50 PM, Rob wrote:
On 15/06/2011 4:46 AM, Geoff Lock wrote:


I think I'll rip off the tyres from me other bike .... should have done
that in the first place... hhmmmm...


Solid tyres should fix that problem!


Hm, now that you mentioned them, I had a google and, of cos, they are
available. I have always known of solid tyres on forklifts and those
solid forklift tyres weigh more than a few grams


Better than pushing your bike home!


Heheheh!! Given the frigging weight of some solid forklift tyres, I'll
push me bike home, thanks

Might have a read of what others say elsewhere about solids. Anybody in
this newsgroup who has used solids and cares to impart some life
experiences?


At one stage the water board had rubber rings about 1"dia to seal the
watermain pipes, off hand the 20" (or the like) did fit tightly when
stretched on the rim - it doesn't take much increase in circumference to
expand to 700 or 27" rims.


Hm, but those rings will probably be quite dense and hard right thru and
will probably produce that "harsh" ride mentioned by Sheldon Brown's
article in the link posted by John Henderson above.

But if one was stuck out in the bush with a flat tyre with no spares and
miles from nowhere, I guess one WOULD wish for a solid tyre - harsh ride
or no harsh ride
  #18  
Old June 16th 11, 06:42 AM posted to aus.bicycle
Geoff Lock[_2_]
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Posts: 475
Default 2 punctures in one ride

On 16/06/2011 12:54 PM, terryc wrote:
Geoff Lock wrote:

Hm, now that you mentioned them, I had a google and, of cos, they are
available. I have always known of solid tyres on forklifts and those
solid forklift tyres weigh more than a few grams


at one stage a few decades ago someone promoted the idea of filling the
tyre with expanding foam. The idea being no punctures. Major problem was
low speed limitations, like 30kms/hr. i suspect the other problem was
recovery cycles were too low as I never saw it on the market.


Recovery cycles? Not sure what you mean there.
  #19  
Old June 16th 11, 06:44 AM posted to aus.bicycle
Geoff Lock[_2_]
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Posts: 475
Default 2 punctures in one ride

On 16/06/2011 1:02 PM, F Murtz wrote:
terryc wrote:
Geoff Lock wrote:

Hm, now that you mentioned them, I had a google and, of cos, they are
available. I have always known of solid tyres on forklifts and those
solid forklift tyres weigh more than a few grams


at one stage a few decades ago someone promoted the idea of filling the
tyre with expanding foam. The idea being no punctures. Major problem was
low speed limitations, like 30kms/hr. i suspect the other problem was
recovery cycles were too low as I never saw it on the market.



used to fill them with grass during the depression.


Hey and make good compost at the same time, eh?
  #20  
Old June 16th 11, 07:41 AM posted to aus.bicycle
terryc
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Posts: 134
Default 2 punctures in one ride

Geoff Lock wrote:
On 16/06/2011 12:54 PM, terryc wrote:
Geoff Lock wrote:

Hm, now that you mentioned them, I had a google and, of cos, they are
available. I have always known of solid tyres on forklifts and those
solid forklift tyres weigh more than a few grams


at one stage a few decades ago someone promoted the idea of filling the
tyre with expanding foam. The idea being no punctures. Major problem was
low speed limitations, like 30kms/hr. i suspect the other problem was
recovery cycles were too low as I never saw it on the market.


Recovery cycles? Not sure what you mean there.


When the foam s at the bottom it gets squashed. on the way up it
expands, just like in an air filled tyre. If it doesn't, you end up with
flat tyres. Recovery cycles or number of revs in the life of the foam.
 




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