Getting the tire to sit even on the rim - Help

[Guest]

I spooned a new front tire on yesterday, a tubeless Shinko with a tube. I cannot get one spot on the tire to seat on the bead at the same height as the rest of the tire however. I had the same thing on the left side so I squirted some lubricant on the bead and filled the tube to 50psi and it expanded out. But, I could not get the right side to do the same. I've tried bouncing the tire, letting the air out and refilling, etc. Nothing I do will get it to come up even for that one section of about 4 inches.

So, what's the trick? Should I go higher in psi to push it out? How safely can I push the psi up to in the tube?

Any help is appreciated.

 

[sharpy]

lube the trouble spot, and hold the oppersite side in when inflating. should work a charm.

 

[tkent02]

Might just take it for a ride, sometimes they straighten out. Sometimes they don't. Might also try taking that side off completely and reseating it, this time with a lot of lube all the way around. What did you lube it with the first time?

I have gone a lot higher on the prssure to seat them, but I don't know how high you can go.

 

[Guest]

I did lube it with some silicone spray. I also did try riding it out. No go...

 

[tkent02]

Try tire lube next time, it really does work.

 

[kdo58]

more air pressure

 

[barnbiketom]

I once bought tire lube and on the container it said "ethylene glycol and detergent"
so after i ran out of that stuff i concockted a mix of , well.. ANTIFREEZE and dawn dish soap.

works like a charm.

 

[GSX1000E]

Did you take a wire wheel/brush to the seating surfaces before mounting the new tire?

 

[FLHGSRay]

I've put as much as 80-90 lbs in them before they seated.

 

[Guest]

I've put as much as 80-90 lbs in them before they seated.

That has to be some of the worst advice I have ever heard someone give.
I have seen a tire explode on a coworker when I worked at a bike shop he got lucky it only mutilated his hand. It sounded like a bomb went off.

Sci85,
It sounds to me like you might have the tube pinched on the opposite side of the low spot pull the tire back off and see what is causing the problem

 

[Guest]

I once bought tire lube and on the container it said "ethylene glycol and detergent"
so after i ran out of that stuff i concockted a mix of , well.. ANTIFREEZE and dawn dish soap.

works like a charm.

Dawn dish soap works good because it is very slippery when you use it and after awhile it dries out and becomes sticky.

 

[Guest]

I will try some homemade tire lube. I dont think the tube is pinched as I have deflated and inflated multiple times, checking the tube and all. I did clean the inside and bead before putting the new tube and tire on.

 

[tkent02]

That has to be some of the worst advice I have ever heard someone give.

How high is safe to go?

 

[Guest]

How high is safe to go?

I honestly could not say. 15 lbs over would be to scary for me after seeing what can happen. But I can say I have never had to go over the recommended max tire pressure to seat a tire and I have mounted well over a 1000 tires so far in my life

Sci85,
If you have done everything right and it still won't seat then you might have a defective tire. It does happen every now and then

 

[tkent02]

I honestly could not say. 15 lbs over would be to scary for me after seeing what can happen.

I have had some that took more, I have always been surprised there isn't a limit printed on the tire.

I know if you air it up to the maximum pressure cold, it will go a lot higher when it gets hot. The tire companies say that's OK.

Have also heard on the news when I was a kid in Huntsville, Alabama, a tractor tire exploded while being mounted at a shop in town, a chunk of it killed someone a mile away.

Very interesting stuff.

 

[Guest]

I have had some that took more, I have always been surprised there isn't a limit printed on the tire.

I know if you air it up to the maximum pressure cold, it will go a lot higher when it gets hot. The tire companies say that's OK.

Have also heard on the news when I was a kid in Huntsville, Alabama, a tractor tire exploded while being mounted at a shop in town, a chunk of it killed someone a mile away.

Very interesting stuff.

I know you would think that they would put a seating pressure limit on the tires.
The cold to hot pressure increase is not as great as you would think around 10% to 15%
A lot of racers use nitrogen now because it dose not increase or decrease in pressure with temperature change

 

[Kiwi Canuck]

Tire pressures

Tire pressures

Bridgestone recommends 57 PSI max to seat the bead on their M/C tires.

http://www.bridgestone.com/products/motorcycle_tires/products/note/index.html


Dunlop recommends 40PSI max to seat the bead.

http://www.dunlop.eu/dunlop_euen/mc/tyres/tyre_care.jsp

Interesting, never knew that, I will be more careful as I've used up to 60PSI before to seat the bead.

 

[tkent02]

You don't want to be holding the tire when the bead pops. That stings!

 

[Guest]

Bridgestone recommends 57 PSI max to seat the bead on their M/C tires.

http://www.bridgestone.com/products/motorcycle_tires/products/note/index.html


Dunlop recommends 40PSI max to seat the bead.

http://www.dunlop.eu/dunlop_euen/mc/tyres/tyre_care.jsp

Interesting, never knew that, I will be more careful as I've used up to 60PSI before to seat the bead.

That's great info KC. Thanks for finding that. I think I went to 50psi before losing my nerve to go higher. One thing I noticed. On these older bikes, the tires are really a tight fit diameter wise. On my dirtbikes, I can literally push the tire over the rims with my bare hands. No tire irons needed or sometimes just one to sqeak it over. To get this tire on the 82 rim took 3 tire irons and 30m of sweat induced wrangling. I wish the old stuff was as easy as the my dirtbikes. Are newer street bikes hard or easy to fit the tires over the rims?

 

[tkent02]

That's great info KC. Thanks for finding that. I think I went to 50psi before losing my nerve to go higher. One thing I noticed. On these older bikes, the tires are really a tight fit diameter wise. On my dirtbikes, I can literally push the tire over the rims with my bare hands. No tire irons needed or sometimes just one to sqeak it over. To get this tire on the 82 rim took 3 tire irons and 30m of sweat induced wrangling. I wish the old stuff was as easy as the my dirtbikes. Are newer street bikes hard or easy to fit the tires over the rims?

Wider modern tires go on much much easier than the old skinny ones.