Lawnmower tyre keeps deflating even after replacing

Best way ive found to tell if a thorn is poking through on the inside is to rub a soft rag around the inside in both directions , it will catch if one is present without nicking you finger..its done both ways cos if its gone through at an angle its harder to feel.
 
Show us a picture of the rim and tyre, so that we can give you targeted, relevant advice
 
Burnerman said:
One of these little fellas has served me well for the last 30 years:
Click to expand...

Thanks for the reminder that I already have one of those, but too late...

Wheel barrow had developed a flat, tubed, but I struggled to get a cycle puncture patch to actually stick to the tube.
 
Sick of faffing with those, so now I shove on one of these:
www.toolstation.com

Flat Free Solid Wheelbarrow Wheel

Never get a flat tyre on your wheelbarrow ever again with this solid wheel from MOVE IT. You'll find that it's ideal for most wheelbarrows, and the air-free construction means it's entirely puncture-proof.The wheel measures approximately 360mm in diameter and has a load capacity of 400 lbs...
www.toolstation.com www.toolstation.com
Comes with a universal bushing kit that fits nowt, but I can usually come up with something!
Soft enough to bump up planks, etc.
John :)
 
The old wheel might be rusty or corroded. This prevents the tyre sealing. It will be difficult to smooth it off without removing the tyre.

Is it possible to get a spare wheel?

Old ones can be painted, but you would have to bake it or leave it for a very long time to harden and gas off solvents.
 
Tubeless tyres usually have it marked “tubeless” on the side
 
So I found the tyre flat again when I came to do a cut after all the rain (and rain, and rain). This time I noticed that as I unscrewed the type cap, I heard a quiet hiss of escaping air. After pumping the tyre up and removing the pump, it was much louder. It stopped when I put the cap back on.
So I'm guessing this is saying the valve itself is the culprit... it really shouldn't be the valve cap that's keeping the air in!

I also think I got mixed up last time when I said it's the new tyre which is leaking, because only one was flat this time and it's clearly not a new one :)
Is it able to tell from this photo if there's an inner tube on this one?

1691656343418.png
 
I thought you could tell by the valve. Tubeless have a big rubber seal, and tubed a screw down metal collar

But yours seems to have neither

I think you need to wire brush, derust and repaint the wheel over winter.
 
Theres a tube in the tyre, quite a few tubeless tyres I come across on ride on mowers have had tubes fitted when the rim rusts preventing an airtight seal. I would try fitting some new valve cores
 
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