Overfilling Tubeless Sealant - did I?

[anonymous-user]

[redacted]

[Your Dad]

Yes, you did overfill, but it's unlikely that putting too much sealant in caused the issue.

[mikecassie]

Just a query regarding the wheels, were they hooked or hookless rims? I seem to recall hookless rims had a max pressure of about 70-75psi. Only asking incase you head off and the tyre gets blown off the rim at that high pressure.
I'm not a fan of multiple standards and now the max pressure of the tyre is not the limiting factor, it can be the rim.

[Harpoon]

250ml a slight overfill?

I use about 30ml per tyre for a top-up of my tubeless road bike, a bit more if sealing a new tyre. Muc Off reckon the same:

https://muc-off.com/products/tubeless-sealant

Muc Off said:

Road: 30 to 45ML per tyre (2 to 3 scoops)
MTB 26” & 27”: 60 to 75ML per tyre(4 to 5 scoops)
Cross 700CC: 60 to 75ML per tyre (4 to 5 scoops)
MTB 29”: 105 to 140ML per tyre (7 scoops or whole pouch)
Downhill: 120 to 140ML per tyre (8 scoops or whole pouch)

[Tall_martin]

Did you try a tube in the tyre that wouldn't seal?

Did you check for thorns/ glass still in the tyre?

Sometimes my tyres won't seal, then will if they are taken off and rotated 90.degress. these are well used rims, I assume there is a dent somewhere

[YorkshireStu]

Better to have too much than too little.

The extra may have a small benefit but not much really.

Ultimately just means more to clean out in a few months time.

[Steve vRS]

How often should you replace the sealant? I’m in my first year of running tubeless road tyres. Does the gunk just wash out with detergent and water?

[okgo]

Steve vRS said:

How often should you replace the sealant? I’m in my first year of running tubeless road tyres. Does the gunk just wash out with detergent and water?

Not easily..

OP - buy a small stans from a shop, then decant from larger bottle into smaller one as it’s the right measure for a fresh tyre. Is what I’ve always done.

[frisbee]

Steve vRS said:

How often should you replace the sealant? I’m in my first year of running tubeless road tyres. Does the gunk just wash out with detergent and water?

I think the theory is that you just keep topping it up until the tyre wears out or you have to take it off for some reason.

I'm bad at doing that, mostly because I've been lazy and not ridden that much for a few years. I've always added sealant through the valve so topping up is easy.

The gunk doesn't stick to rims but is horrible to clean off of the tyre bead. Some tyre and rim combinations appear to need the sealant to help the tyre seal to the rim, rather than just being for sealing punctures.

[YorkshireStu]

Steve vRS said:

How often should you replace the sealant? I’m in my first year of running tubeless road tyres. Does the gunk just wash out with detergent and water?

Every 4 months, ideally. Second time is a top up, no need for a complete redo. Just send the sealant through the valve.

My road tyres typically only last 4 months, GP5000's, so I don't even need to refill them.

MTB tyres last a lot longer so initial fill, then a top up at 4 months, and next time tyre off, clean, and redo.

I use Muc-Off sealant and have the Park Tool sealant injector, makes it all really easy.

[ALawson]

frisbee said:

I think the theory is that you just keep topping it up until the tyre wears out or you have to take it off for some reason.

I'm bad at doing that, mostly because I've been lazy and not ridden that much for a few years. I've always added sealant through the valve so topping up is easy.

The gunk doesn't stick to rims but is horrible to clean off of the tyre bead. Some tyre and rim combinations appear to need the sealant to help the tyre seal to the rim, rather than just being for sealing punctures.

Agreed, just top them up every 3-4 month. I never remove the tyre unless I have to and then it’s normally to be replaced.

Once removed a few times you will need an airshot or similar to reseat as the sidewalls soften.

[Steve vRS]

Maybe a daft question but where does the sealant go to? Or does it harden and form a layer inside the tyre?

[okgo]

Steve vRS said:

Maybe a daft question but where does the sealant go to? Or does it harden and form a layer inside the tyre?

Swills around inside the tyre. Rushes to a puncture when something creates a hole and seals.

[Steve vRS]

okgo said:

Steve vRS said:

Maybe a daft question but where does the sealant go to? Or does it harden and form a layer inside the tyre?

Swills around inside the tyre. Rushes to a puncture when something creates a hole and seals.

Sorry, that I knew. But if you don’t have a puncture, where does it disappear to?

[okgo]

Steve vRS said:

Sorry, that I knew. But if you don’t have a puncture, where does it disappear to?

It doesn’t. I would imagine the gradual mixture with air means as you say it slowly sets inside the tyre.