- tubeless explained
I’ve just converted to tubeless after much debate but reading up on it never explained in laymen terms HOW it was better. I mean low pressure but rolls better just because the tubes missing? how can the same pressure be different?Posted 5 years ago
so I thought I’d explain here for anyone thinking of doing the same but like me didn’t quite get it.
the very first thing I noticed after inflating with the compressor was the tyre was SOLID. no idea how much pressure was in the tyre and I never run a tyre like this so I put the track pump on to let down to say 40psi….. used to run 40-45 on rear.
I put the track pump on and its 35psi! you push the tyre though an it’s SOLID like 50psi! no tube = no play. I let the tyre down until it felt right 25psi! if I had 25psi with a tube I would be able to push the tyre half way in yet now its SOLID and low pressure inside means the tyre will mould and grip much better but not sag when riding normal.
in short low pressure in a tubesless tyre is at least as firm as 10psi more with tubes.
most here will already know this but im explaining for the next guy looking for a clear explanation.CheezpleezSubscriber
I fancy a share of all this derision, so I’ll admit to having noticed this phenomenon too. Nothing to do with the type of tyre, purely a difference between the ‘thumb feel’ of a tyre when run at a similar pressure with and without a tube.
Not sure it ‘explains’ tubeless though.Posted 5 years agogrumMember
Think you might find thats more to do with the car tyre being a 4 ply and a bike tyre not.
Mebbe but IMO the OP is right in that the exact same tyre feels significantly harder tubeless at the same PSI. What’s your explanation for that? I asked about this ages ago:Posted 5 years ago
the guys i ride with who run low pressures before didnt notice. i ride high pressures normally and certainly notice. i wouldnt even dream of riding 25psi before. always some smart ass ready to scoff at a comment. i eat a steak not poke it but i sure as hell poke it to check its done.Posted 5 years agoarchiebaldMember
Pitchpro2011, friends you ride with???? Either your being completly honest or your friends have the patience of saints because you must bore them sensless with all your mindless dribble?!?!?!
Have you ever heard such cr$p come from one person and what’s all this about poking a steak!!!!!!
It’s been entertaining that I agree.Posted 5 years ago
I’ve noticed the same phenomenon using the same tyres – just converted to tubeless – to get the same amount of squish (eg similar contact patch size) when riding, I dropped from 40psi to about 20-25.
My idea (and I haven’t really spent the time thinking it through in great enough detail to say that it’s the right answer):
An innertube is elastic and when pumped up inside a tyre, is stretched. As such you have a certain amount of pressure in the tube just to get it to fill the tyre.
You don’t have that with tubeless – the air always acts directly on the tyre and isn’t being compressed by anything (until you sit on the bike)
So, however much pressure it takes inside the tube to get it to expand to fill the tyre is the difference.
Maybe 🙂Posted 5 years agondthorntonMember
clubbers explination sounds plausible – but…
it definately doesnt take 15-20 PSI to expand a tube to the shape of a tyre which is the difference we’re talking about (unless your using a racing bike tube!)
even if it did take say 15psi to just touch the outer wall of the tyre – if you push your thumb into the tyre you would still feel 15 psi worth of resistance from the tube(Not 0 PSI as would be required for this to explanation to be correct).
next….Posted 5 years ago
in case you haven’t noticed the clowns giving me shit are the guys I ride with. clearly alot of people notice this ,however, they always dismiss my opinion as nonsense despite having a combined iq of 50. 😉
I just bought a ceramic and titanium headset…. which they scoff at even though the expensive shit bearings they just bought broke within 2 weeks.Posted 5 years ago
much love you tossers xxx
simple really when you think about It…..take 2 things exactly the same but in extreme to highlight…… a brick and a flat piece of wood weighing exactly the same. The wood even though being the same weight and force will offer more resistance from sinking in a swimming pool because the surface area is greater….the volume is greater. in the tubeless tyre there is a larger surface of air pressing against a flat surface.Posted 5 years agoshindiggyMember
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 ago
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