Sighs at lack of elementry physics, wood is generally less dense than bricks that’s why it floats, some woods do not float.
When something like a log of wood is put into water, it pushes down on the water and the water moves aside to make room for the object. When there is enough water to push back up against the object with the same force as the object is pushing down, then the object will float!
That’s why a piece of wood that is lightweight for its size will float in a big body of water, like the ocean or a river. However, that same piece of wood might not float in a different smaller body of water.Posted 5 years agob45herMember
there’s a big thread on mtbr about tyres and rolling resistance, a german mag ran tests and tubeless setups had significantly less rolling resistance than tubed, they found the biggest factor in rolling resistance was the carcass construction not the tread or volume.Posted 5 years ago
maybe having a tube in there affects the carcass in some way.somafunkSubscriber
However, I am a man who says tubeless is rubbish and a faff.
Hmmm, strokes chin with wary expression, not quite sure if Waderider is being serious or is coming the **** on this one.
I’ve rode wi tubeless since 2007, i say “rode” but as i sacked off the bikes completely for a few years i really have only rode for a couple of those years but they have been rode tubeless, mavic slr’s and stans with absolutely nae faff, nae trouble, and most importantly i have never had a puncture so never carry a tube nor a pump, nor a puncture repair kit.
Tubeless rocks a fat one, i’ll never run a mtb wi tubes ever again.Posted 5 years agokristoffMember
I think the OP does have a point.
I’m yet to go tubeless but I can see there will be a change. The tyre may deform less as how often do you think an inner tube will match the exact shape of your tyre and chosen rim? There will be some voids where only atmospheric air pressure will exsist and thus when you sit on your bike you’re effectively pushing the inner tube info the rim. Where as in a tubeless setup the pressure should be the same everywhere inside the tyre.
So partly to do with volume of air and also partly to do with the fact the entire tyre/rim is filled with no low pressure zones.
That’s my take on it.Posted 5 years agodantsw13Member
^. This ^
An inner tube wil not exert equal pressure on all parts of the tyre, due to a mismatch in the exact shapes of each, and there will be a small void near the beads also.
With no tube, the entire tyre volume is at equal pressure.
Whether this produces the phenomenon described by the OP I dont know, but it does make sense.
I ride tubeless for the puncture resistance, not weight/rolling resistance/lower pressure. So far, no punctures in 2 years. I had one burp, mainly due to being lazy, and not pumping up a tyre I knew to be WAY down on pressure, and riding it on a steep rooty descent.Posted 5 years agosomafunkSubscriber
[/quote] Out of interest – do you ever ride solo, literally hours from any kind of assistance?
As I stay in the arse end if nowhere, deepest darkest Galloway which is one of the most sparsely populated area in Scotland I always ride solo coz I’m a 100% antisocial cyclist (not ashamed of it). I head out into the hills for hours at a time by myself and if something happens its up to me to get out of it but now’t serious has happened yet, apart from a compound fracture of my arm/elbow yrs ago but that was manageable. I guess I could wear a camalbak wi a multitude of spares inside but I prefer to ride light wi a water bottle or two and a teeny pedros seat pack, if I run out of water there’s any amount of burns to fill up from. As kids in Argyllshire in the 80’s we’d ride for miles n miles with only a pair of shorts, trainers and a t shirt riding quite dangerous terrain as I look back now and nothing terrible happened to us then so all this kit I see folk carrying at trailcentres is rather amusing, massive packs stuffed to the gunnels wi all sorts but if you need that comfort zone to ride with then it obviously works for you, I just prefer to carry nothing as I’m perfectly comfortable doing so. I was always brought up in the middle of nowhere as a kid so I’m very comfortable wi it, it may be different if I was brought up in city or urban environment .Posted 5 years ago
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