Having issues getting a CX tyre to pop into the bead on my carbon rims.
The tyre is rated to 86 psi but it still won’t pop with 115psi up it.

Also tried soapy water – didn’t work
Washing up liquid – also didn’t work.

What next?

The tyres are being used with tubes and inflated with a track pump.
I may build an inflator thing in the hope the punch of air will do the job.

Sudocrem.

I’d not worry about 115 for the length of time it takes to get the tyre to seat. Just drop it back down afterwards to a normal level once it’s seated.

you could try talc (although its a carcinogen so beware!).

Talc, didn’t think of that. Worth a try.

Sudocrem 🙂 default suggestion for everything on STW? Slippy clutch,Sudocrem. Lost my job,Sudocrem.
I’m depressed, Sudocrem.

I sometimes resort to a bit of manipulation.

Try bouncing the wheel off the ground, with any non-seated area taking the impact. The shock can help move it.

Or put the troublesome spot on the ground,angle the wheel away from you slightly and use the toe of your shoe / boot to “drag” it into place. Start at the edge of the non-seated area and work towards the worst bit.

Try the ghetto inflator. Built one up last week to get a tyre on to one of my wife’s wheels.

I’ve bounced the crap out of the wheels but no joy.

All of the usual tricks have failed so an inflator may help. I may have an old sig bottle I can use ….hummmmmmm !!!!

I’m not sure what the problem is that a ghetto thingy is going to solve?

You’re not trying to force a load of air into a tyre to get it onto the rim before the air all rushes out again.

You’ll still have to get to 115psi to make it seat – you’ll just get there a bit quicker with an air reservoir instead of a pump?

Just think the ‘jolt’ of air rather than the gentle increase will help. Maybe not, but I need to try before the wheels and tyres get thrown across my neighbours gardens.

meh, bead’ll “stretch” a bit in a day or so. If it holds air, just ride it and I bet it pops on

I had a problematic tyre recently. A bit of silicone spray did the trick. Admittedly not something that you might have lying around, I have a can I use for lubing my forks and shock.

Spoze I could use some KY, that’s water soluble.

Rubbing KY on my rim in the garden – fnar ……

I have had cheap wire beaded tyres that arent round and never go on properly.

Silicone spray – everyone SHOULD have it lying around, it’s bloody useful. Available in Halfords nowadays from the WD40 specialist range, also Maplin. Doesn’t affect rubber.

I’ve also ridden tyres that weren’t fully seated. Seated on their own later.

Update. Just had the tyre explode off the rim. No where near the 86 psi max.
Can’t get either tyre seated no matter what I try. Silicone lube, and compressor included.

I’ll just wait for my ears to stop ringing and I’ll email the guys I purchased them from.