Why won't my tyres seat?

[fair weather cyclist]

Err dont understand this, a pump or air tank does not grip on the valve core but on the valve stem itself . My tank which is a air shot

https://www.merlincycles.com/airsho...ng&utm_campaign=phg-GB&ucpo=145269&source=PHG

Screws onto the valve stem for a really proper fit. I think you really need to take the valve core out and determine why your tank isnt locking onto the valve stem. Is it missing something?

My tank, the beto tubeless air tank, doesn't screw onto anything. When you clip it to the valve core, it stays put. You CANNOT clip it to the valve core.

 

[chriswoody]

Looking at that photo of your valve, it does indeed look wrong. The shape of the rim is not allowing the knurled collar to screw down and as such the o-ring under the collar is not completely sealing the gap. There's no way the tape underneath will be able to seal that gap, you need the o-ring to do that (in conjunction with the rubber block thingy on the bottom of the valve stem) and the shape of the rim is preventing that.

Sounds odd that the tank doesn't screw on, my Schwalbe tank screws onto the outer collar of the valve so that the valve core can be removed.

Here's a slightly fuzzy crop of my tank screwed to my valve and showing the knurled collar sitting pretty flush to the rim.

 

[fair weather cyclist]

Sounds odd that the tank doesn't screw on, my Schwalbe tank screws onto the outer collar of the valve so that the valve core can be removed.

Here's a slightly fuzzy crop of my tank screwed to my valve and showing the knurled collar sitting pretty flush to the rim.

Don't know what to tell you. The beto tubeless air tank doesn't have a screw on mechanism, it's a clip on. And it doesn't clip on the valve stem but it does clip on the valve core. Just like my track pump does.

And my rims are asymmetrical.

So the photo of your screw on tank on your symmetrical rim doesn't really help in my situation, does it?

 

[Dogtrousers]

My tank, the beto tubeless air tank, doesn't screw onto anything. When you clip it to the valve core, it stays put. You CANNOT clip it to the valve core.

I'm still not understanding this.

I don't actually know what kind of valve you have, schrader or presta, but in either case a pump that clips on will clip on to the outside threaded bit (the thread that takes the lock ring and the valve cap). In neither case will it care whether there's a valve core inside.

Or have I just got my wires crossed. Probably

 

[Deleted User]

As already mentioned, you need the core/valve whatever you want to call it removed before you try and seat the tyres in order to allow a bigger 'rush' of air into the tyre.

I've got the blue airshot one and have yet to find a tyre I can't seat with no more than Two 'blasts' so to speak.

I pump mine up to 120psi.

 

[Alex321]

Err dont understand this, a pump or air tank does not grip on the valve core but on the valve stem itself . My tank which is a air shot

I've actually had similar issues, even though I always thought it should work as you said.

Some pumps, with the muc-off valves just won't grip the valve stem with the core removed.

I think they normally must grip the part of the core that looks like valve stem. I think the removable core stems must be fractionally larger diameter than the fixed core stems.

 

[chriswoody]

Don't know what to tell you. The beto tubeless air tank doesn't have a screw on mechanism, it's a clip on. And it doesn't clip on the valve stem but it does clip on the valve core. Just like my track pump does.

And my rims are asymmetrical.

So the photo of your screw on tank on your symmetrical rim doesn't really help in my situation, does it?

All I was trying to do was point out to you that I agree with you that your valve stem is not seating properly on the rim. I apologise for trying to be helpful, I won't do it again.

 

[fair weather cyclist]

I'm still not understanding this.

I don't actually know what kind of valve you have, schrader or presta, but in either case a pump that clips on will clip on to the outside threaded bit (the thread that takes the lock ring and the valve cap). In neither case will it care whether there's a valve core inside.

OK, it does NOT clip to the outside threaded bit.

Unless to clip it I need to use an unreasonable amount of force.

It DOES clip with no issues to the threaded bit of the valve core.

 

[fair weather cyclist]

Could be that the tank does not clip on this specific valve (muc-off). I'll try to see if it does clip on the valve stem of my giant tubeless valve

 

[Deleted User]

OK, it does NOT clip to the outside threaded bit.

Unless to clip it I need to use an unreasonable amount of force.

It DOES clip with no issues to the threaded bit of the valve core.

I would say here lies your problem, not enough of a 'blast ' can be achieved with the valve core in place. Sh1t design if you ask me.

 

[fair weather cyclist]

I would say here lies your problem, not enough of a 'blast ' can be achieved with the valve core in place. Sh1t design if you ask me.

Sh1t design from the tubeless tank that has won a design award on the year it came out. Interesting

 

[Deleted User]

Sh1t design from the tubeless tank that has won a design award on the year it came out. Interesting

Can't seat your tyres though can it! Interesting 😆

 

[Alex321]

Sh1t design from the tubeless tank that has won a design award on the year it came out. Interesting

Not sure it is the tank that is the issue, but rather the valves.

My regular track pump has a similar issue trying to clamp it to the muc-off valves with the core removed.

 

[Ming the Merciless]

Sh1t design from the tubeless tank that has won a design award on the year it came out. Interesting

Well clearly it’s shoot. It isn’t working, when it should be simple.

 

[fair weather cyclist]

Can't seat your tyres though can it! Interesting 😆

Can't say it's the air tank.

Can be multiple things, dodgy taping job, wrong valve for asymmetrical rims.

The tank is the least likely to be the cause, let me tell you that