Mystery tubeless deflation on the trail finally sorted.

[Waynemarlow]

Been having a mystery tyre deflation whilst underway recently which had really started to irritate me. Pump it up and it wouldn't loose a bit of air whilst sitting in the garage. Ride it and sometimes it would be fine, the next suddenly you would loose 1/2 the air and needing a top up. No obvious leaks of sealant around the rim indicating a problem there.

Finally took the tyre off and found the cause, a cut about 5mm long right through the centre of the tyre, the sealant seems to plug the hole, but the cut was so big that when you hit a stone or root and deflected the tyre just at that point, it looks as though the sealant plug would be spat out and in the process before a new plug would form, 1/2 the air would go.

Mystery solved with 3 tyre repair plugs through the same hole, the sealant seems to do the rest.

 

[Gary]

which tyre repair plugs did you use?

 

[towzer]

FYI, ime with large/large multiple plug fixes it is better to replace with an inside mushroom as I have had a couple of ‘complex repair’ plugs fail after a bit of tyre wear etc on large punctures

Tyre Repair 5 x 3mm Plug / Patch 5 x 6mm With Lead wire & 20ml Schrader Cement | eBay

45mm patch with a 6 mm Puncture Stem with a lead wire & 30mm Patch with a 3mm puncture Stem with lead wire to help pulling the plug through the tyre all individually wrapped.

www.ebay.co.uk

I’ve also bought some stans darts (They’re claimed to chemically interact with the sealant I think)as these are meant to work on larger punctures but luckily I haven’t had to use them yet so can’t give feedback

 

[Waynemarlow]

FYI, ime with large/large multiple plug fixes it is better to replace with an inside mushroom as I have had a couple of ‘complex repair’ plugs fail after a bit of tyre wear etc on large punctures

Tyre Repair 5 x 3mm Plug / Patch 5 x 6mm With Lead wire & 20ml Schrader Cement | eBay

45mm patch with a 6 mm Puncture Stem with a lead wire & 30mm Patch with a 3mm puncture Stem with lead wire to help pulling the plug through the tyre all individually wrapped.

www.ebay.co.uk

I’ve also bought some stans darts (They’re claimed to chemically interact with the sealant I think)as these are meant to work on larger punctures but luckily I haven’t had to use them yet so can’t give feedback

Mmmm not seen those small enough for bike tyres, good call. The downside is I find that it’s almost impossible to solvent glue on patches to the inner part of the tyre once you have used latex sealant

 

[Waynemarlow]

which tyre repair plugs did you use?

Tubeless MTB Tyre Puncture Repair Kit Bike Puncture Repair Tool with 10 Strips | eBay

Primarily for MTB style tubeless tyres but may suit other tubeless cycle tyre applications. Tubeless MTB Tyre Puncture Repair Kit. Quickly and easily re-seal tubeless bike tyres with large punctures too big for sealant alone to be effective.

www.ebay.co.uk

 

[Gary]

Thanks man.
I was wondering if you meant that type.
I tend to patch tyre rips from the inside using automotive tyre patches and vulcanising solution. Automotive plugs are also available that look a little like a large rubber drawing pin and work in the same way as a patch but plugs the hole too.