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Roadies with their narrow, thin-cased tyres are always blathering on about punctures because they are always getting them.
The risk of punctures is over-stated for the likes of us who ride hybrid/mountain style bikes with wide, comparatively thick-cased tyres.
There are 2" Marathon Supremes on the Rose which, if inspected occasionally and kept properly inflated, are unlikely to puncture.
Could still happen, of course, and I do carry puncture repair stuff.
But what I don't do is worry unduly about getting one.
air free there's loads!
Find myself thinking <why not? then wonder why they aren't everywhere so i think, right then let's have a look. first one I came across when your topic piqued my interest was
Originally Posted by mountainsport
britek airless tires/tyres
BriTek’s Brilliant Airless Bicycle Tire Reinvents the Wheel Mountain Bike Energy Return Wheel Britek Tire and Rubber
then it all went bonkers! here's just some . let's have the informed and mechanically sound criticisms that you are so good at folks.
timthumb.jpg Tannus Puncture Proof Tyres
"Tire balls"559831-559833-Offroad-Pro-Tire-Ball-Kit-3 (1).jpg
and a link to a site selling a wide variety of airless and foam filled tyres so you can see prices.............Bicycle Tires Guaranteed To Never Go Flat
All suffering from the problem I specified above and enlarge on here. A good two-wheeler tyre carcase has considerable lateral stiffness to give reliable and stable cornering but far better vertical compliance to absorb road imperfections and ensure maximum contact area and time for safety.
That is only achieved with a multi-ply carcase, the cord and rubber layers design giving those differential characteristics. Single materials fail since they have the same compliance in the two planes, reducing safety whatever the choice of compliance and often reducing comfort. Also they cannot be varied in load bearing capability to suit the occasion and are usually very difficult to fit without rim damage.
I've been reading up a lot about these tires and seem to be getting more negative responses far more than positive ones, so in that case a definite no no for me.
Originally Posted by flecc
11th July 2013, 09:33
Speaking of Good Technology, I wondered if there was a product that added Kevlar protection in the form of a Liner?
Just had another puncture from Tottenham Diamonds, as the broken beer bottle glass is called here! :-(
No reply from Peoples Republic of Haringey re my claim for damaged Schwalbe Marathon Plus tyre that their unswept debris, etc, managed to destroy!
Slime in inner tube saved it, so I kept the tube and put Brompton yellow tyre on.
Many punctures avoided but slime has eventually run out, sugar! Going to slime new tube, and wondered about tyre liners. Usually one throws away the Kevlar protection with the old tyre, what if you could transfer it in a liner? Do Kevlar fibres break down over time? How many TPI & what gauge should the threads be?
Had a good run though :-)
Wish Brompton had suspension, discs, leccy motor, enclosed chain.. Roll Cage!
11th July 2013, 11:02
Saneagle bought some of those strips that go round the inside of the tyre. He got them from Halfords. On the first journey the sharp corners on the ends punctured both tubes, so we feathered the ends and taped them to the tyre. At the same time he changed the tubes to thicker "puncture proof" ones with slime in them. They lasted a bit longer, but while we were sitting having a pint at the pub, there was a sudden hissing noise and the tyre went down all by itself15 minutes after we stopped riding. The tape had broken and the end of the strip had punctured the tube again, so they got ceremoniously chucked in the bin.
The golden rule is that there are no golden rules.
11th July 2013, 11:06
The irony punctured by the very object designed to prevent punctures!
11th July 2013, 12:29
Inserts/liners are always in danger of creating the puncture they are meant to protect from, usually by abrasion of the tube.