Lumpy tyres? Centering tyres?

[All uphill]

I have a pair of Schwalbe G Ones 35mm that had this problem.

The solution was a bit of washing up liquid smeared on the rims of the tyres, rotate the tyre on the rim before inflating to ensure it is not sticking anywhere round it's circumference, inflate to 100psi, ride round the block, reduce pressures.

 

[Sturmey_Hub]

These are exactly the tyres I'm using. If the max recommended pressure is 65psi, but you were confident going as high as 100??

 

[Dadam]

Same tyres, same issue. Solved in my case with silicone oil (used sparingly)
https://www.cyclechat.net/threads/cant-get-tyre-to-seat.301650/#post-7378124

 

[N0bodyOfTheGoat]

These are exactly the tyres I'm using. If the max recommended pressure is 65psi, but you were confident going as high as 100??

Check the max inflation pressure of the Hunt wheels themselves, they might not be much more than ~80PSI.

 

[fossyant]

Thanks to all, and to answer those.....
These Schwalbe tyres have a max pressure of 65psi. I don't mind over inflating a little but don't feel good to take it to 120.
Wheels run true.
Tyre width is well within inner tubes (also Schwalbe), range.
The tubes themselves are a little lumpy, but I find it hard to believe that this would effect a rigid tyre, but will try different tube

Can you see a bit where the tyre is too far into the rim ? You'll see the recess for the hook not sit correctly. Find the poor fitted section, deflate, use washing up liquid on that part and inflate to say 80. I've some MTB tyres from Schwalbe that need inflating to 60 to get them to sit, then drop pressure to 30.

 

[Sharky]

As a way of narrowing the possible causes, try marking the tyre and rim, where the bulge is.
Rotate the tyre 90° and reinflate.

If the bulge travels with the tyre, then must be a problem with the tyre.

If the bulge stayed where the rim is marked, could be a problem with the rim.

If the bulge moves to a completely new location, then could be a problem with the technique being used to fit the tyre.

Good luck

 

[All uphill]

These are exactly the tyres I'm using. If the max recommended pressure is 65psi, but you were confident going as high as 100??

Sure, I went slowly in case one came off the rim.

 

[wafter]

I've never encountered an example of this issue that wasn't resolved by a sparing but thorough application of synthetic grease around contact area of the bead on the tyre and inflation to a "generous" pressure... just don't get any grease on the brake track..

 

[accountantpete]

Thanks to all, and to answer those.....
These Schwalbe tyres have a max pressure of 65psi. I don't mind over inflating a little but don't feel good to take it to 120.
Wheels run true.
Tyre width is well within inner tubes (also Schwalbe), range.
The tubes themselves are a little lumpy, but I find it hard to believe that this would effect a rigid tyre, but will try different tube

I suggest that you over-inflate as suggested to 120psi. You will hear little pops as the tyre expands outwards on the opposite side to your bump-and pulls the problem bit of tyre into the correct position. Then you can release the pressure to the required amount.

I do this all the time on my tubeless set up with no ill effect.