Is this the answer to a maidens dream

[Old Timer]

Puncture proof bicycle tires

 

[onmebike]

Puncture proof bicycle tires

Not a bad price and a guarantee?

 

[lemmy]

Yes, 220 dkk is about £26. Interesting on the face of it.

The kind of thing I don't want to be the first to buy!

 

[Morag]

Be interesting to read some independant reviews.

 

[flecc]

They're useless, been around for years, tried and reviewed at times and never accepted as satisfactory.

Tyres are constructed with clever carcase construction techniques to give lateral stability but with vertical flexibility, different in the two planes.

These one material tyres fail through being the same in all directions, somewhat unstable laterally so feeling insecure on corners when banked at all, not a pleasant ride. They are also very tight to stretch onto the rims and need some brutality to get them on, so not very kind. I remember VeloVision being appalled when one supplier put similar ones on using huge screwdrivers as tyre levers on the alloy rims with considerable force.

Ok on two-wheel trailer wheels if the loads are not to be excessive.
.

 

[lemmy]

Another one bites the dust!

I shall shortly unveil my hover-wheel to the world. The wheel is solid and as you pedal a cunning series of moving valves pumps air at high pressure to the wheel. This pressure is fed through tiny holes at ultra high pressure, This gives the floating on air effect all around the wheel rim a la hovercraft but vertically rather than laterally. Hey presto, no punctures, and pleasant cushioned ride

 

[flecc]

But no grip on corners.
.

 

[lemmy]

But no grip on corners.
.

Details. I pursue a visionary agenda

 

[piotrmacheta]

I use slime stuff in the inner tube which seems to work. I know others who use a liner which fits between tyre and tube - could try both.
One thing I noted on the TV was the programme 'Dakar' where Charlie Boorman used foam inserts in their motorbike tyres - looked like a great idea but never seen any and maybe they don't have them for bicycle tyres but does seem a good idea.

 

[Andrew harvey]

I've still got a set in my shop. They are half road linners the inner tube sits on the rim inside them. Half way from a solid tyre, never sold a pair and I'm not sure if I want to.
One customer asked us to replace his solid tyres after 20 odd years, they looked more like a pair of old TT100's by this time, flat on the top curved around the sides and as hard as nails, but they had never let him down.
I did sell the last pair of solids to a woman last year, she coached the local rowing team and spent her time up and down the river bank, an absolute bitch to fit.

 

[bode]

I did sell the last pair of solids to a woman last year, she coached the local rowing team and spent her time up and down the river bank, an absolute bitch to fit.

Yes, but what were the tyres like?

 

[eddieo]

The theory is lovely and you would think they should kinda work.......but when thy have been discussed before they where rubbished

 

[theskip1]

recycled? i wonder how long does the tread last ?

 

[flecc]

Yes, polyurethane can be recycled, no idea how long the tread will last though. Can't see anyone wanting to do high mileages on these anyway, probably mainly suit someone who wasn't critical about handling pottering about at lowish speeds.
.

 

[Haku]

The set of tyres + tubes I had on my Urban Mover for the first 2 years didn't bode well with the broken bottles the local yoof like to leave on pathways, rear innertube had 5 patches and the front had 8! once had to put 3 patches on in one go.

When I had a pile of parts replaced a year ago I also had the tyres & tubes replaced with the standard stuff UM now use (Kenda tyres but don't know what tubes), so far only one puncture in the rear wheel and this time I didn't have to dig out any shards of glass like before.

Now my rear rim has a dent in it from hitting a bloody pothole at high speed I don't keep my tyres at full pressure because the roads are atrocious, even before the recent winter ****ed them up even more.

 

[Old Timer]

Youv`e gotta cycle around the lanes where I live, if it`s not thorns then its flint(remember even my new Marathon punctured on the first outing)
The Marathons seem to have settled down and no punctures since that first unlucky one. I`m prepared to accept a couple a month but it was more than that at one time. If it ever gets that bad again then I would be forced to try them out. I even looked into applying my own kind of expanding foam but couldn`t find anything suitable.

If ever air became at a premium for what ever reason(silly thought I know) then someone would develop the right solid tyre(maybe a split rim to make them easier to fit?

How about a nice set of cartwheels like a dandy bike

 

[flecc]

If ever air became at a premium for what ever reason(silly thought I know) then someone would develop the right solid tyre(maybe a split rim to make them easier to fit?

The military have an interest in puncture proof tyres for obvious reasons, but solids have never measured up to what's needed. Instead we used "runflats", tyres which had strong enough carcases that once punctured, they could run without air in at moderate speeds for at least 50 miles. There have been equivalents made by Goodyear for cars needing them for special purposes.

The fact that the military haven't been able to make solids viable speaks volumes, considering the research budgets they've had, in the USA in particular.
.

 

[Old Timer]

The military have an interest in puncture proof tyres for obvious reasons, but solids have never measured up to what's needed. Instead we used "runflats", tyres which had strong enough carcases that once punctured, they could run without air in at moderate speeds for at least 50 miles. There have been equivalents made by Goodyear for cars needing them for special purposes.

The fact that the military haven't been able to make solids viable speaks volumes, considering the research budgets they've had, in the USA in particular.
.

Hmm! makes you wonder! Yeh! I remember the run flat tyres, didn`t dunlop also make one/ was it called Denova? or somrthing like that?

 

[flecc]

That's right, the Denovo. Never caught on though.
.

 

[NRG]

My car comes with run flat tyres as standard, I hate them! They have very stiff side walls and require an unusually high inflation pressure to keep the wear pattern even across the tread. This means the ride is over hard and the stiffness causes them to skip and jump over uneven road surfaces loosing traction.

I can't wait to wear them out so I can fit a conventional set of tyres!