Never heard the second pop...

[OmegaSix]

Inflating a Michelin 160/60ZR17.  Pop went the bead on the side that was up, but no pop from the other.

Stopped at around 80 psi - let it go - -flipped the wheel over to watch.  Re-inflated to 80, and never heard a pop.

Went upstairs, got my armor jacket, some gloves and goggles, returned and inflated all the way to 120 psi.

Nothing.

The little line is equidistant around the entire circumfrence on both sides, and it's holding pressure.

I left it inflated to 70 psi and it's sitting in my basement till morning.  

If it still has 70 in it in the morning, do you guys think I'm safe to drop it back down to operating pressure and put it back on the bike?

[Busy Little Whiner]

Inflating a Michelin 160/60ZR17.  Pop went the bead on the side that was up, but no pop from the other.

Stopped at around 80 psi - let it go - -flipped the wheel over to watch.  Re-inflated to 80, and never heard a pop.

Went upstairs, got my armor jacket, some gloves and goggles, returned and inflated all the way to 120 psi.

Nothing.

The little line is equidistant around the entire circumfrence on both sides, and it's holding pressure.

I left it inflated to 70 psi and it's sitting in my basement till morning.  

If it still has 70 in it in the morning, do you guys think I'm safe to drop it back down to operating pressure and put it back on the bike?

Drop pressure to recommended PSI... spin the wheel on the axle and if your little line is equal distance
around the both sides then the bead is seated... what more could you wish for??? sometimes one bead
will roll on without the customary pop...  

[highside]

I have had plenty of beads seat without popping. In fact I have had one or two that seated on one side before I even started inflating the tire.

[Woodys Euphemisms]

I have this happen once in a while.  Inflating, deflating, reinflating. Still nothing.  Only way I get satisfaction is by breaking the bead and working some lube down into it, then reseating.  Works every time.

[chornbe]

Drop pressure to recommended PSI... spin the wheel on the axle and if your little line is equal distance
around the both sides then the bead is seated... what more could you wish for??? sometimes one bead
will roll on without the customary pop...  

*nods*

[Snowbird]

What the above said... and I'd NEVER over-inflate a tire to 120 psi. Could damage the tire internally and you'd never know it.  

[whoaru99]

+1

Now I'd be worried if the tire or wheel was overstressed by that much pressure.

[Busy Little Whiner]

What the above said... and I'd NEVER over-inflate a tire to 120 psi. Could damage the tire internally and you'd never know it.  

A tire is a great elastic body and will just show a little more expansion with 120psi... based on that
knowledge I say you're OK... save the worry for road hazards... after all they pose more of a internal
threat than over inflation...

[OmegaSix]

Just got back from my test ride.  Did a couple of laps around the 'hood, and stopped for a good look.  

All things looking spiffy, I rode out from Baltimore, up to Lancaster, PA west over to Gettysburg, PA and back down to Baltimore.  

About 130 miles or so - mixed roads - at least one good interstate sprint thown in.  The tire did what I expected it to do - - be round, and turn...
 
Got it good and scuffed in - all seems well.

[JoelCool]

Sometimes both beads pop on at the same time, resulting in ... one pop.  

[Snowbird]

A tire is a great elastic body and will just show a little more expansion with 120psi... based on that
knowledge I say you're OK... save the worry for road hazards... after all they pose more of a internal
threat than over inflation...

Not so. The cords and carcass are designed to inflate to a maximum, fully inflated size and the carcass is even permanently marked not to exceed a certain pressure on the tire side. It is marked for a reason, and that reason includes over-inflating to "pop" the bead.

Whether road hazards or over inflation pose the more serious hazard is immaterial.

[Busy Little Whiner]

Not so. The cords and carcass are designed to inflate to a maximum, fully inflated size and the carcass is even permanently marked not to exceed a certain pressure on the tire side. It is marked for a reason, and that reason includes over-inflating to "pop" the bead.

Whether road hazards or over inflation pose the more serious hazard is immaterial.

To begin with the cords and carcass were formed in a mold under much higher pressure than 42psi
marked on the side wall which is the highest recommended *running* pressure... there are no words to
the effect of "do not exceed a certain pressure" on my Metzelers nor Dave's Michelins...

A touring rider should worry more about under inflation than over inflation... because air pressure plays
a major role affecting the size and shape of the contact patch and the distribution of the mechanical
forces on various points of the tire in contact with the road. Check pressure before every ride because
tires have a natural porosity which allows air to escape molecule by molecule... Air pressure affects
every aspect of the tire safety economy and riding enjoyment... Low pressure can degrade
performance in all areas...

I safely go to 80 psi even after the beads pop and there is no one armed with first hand knowledge
to the contray...

[JoelCool]

To begin with the cords and carcass were formed in a mold under much higher pressure than 42psi
marked on the side wall which is the highest recommended *running* pressure... there are no words to
the effect of "do not exceed a certain pressure" on my Metzelers nor Dave's Michelins...

Larry, I'm not taking sides here, but the manufacturing pressure you're refering to has nothing to do with the air pressure intended for inflating the tire when it's in use.

The original poster was just missing hearing the second bead seat.  That issue has been resolved.

[Snowbird]

there are no words to
the effect of "do not exceed a certain pressure"

So, according to your theory, 1000 psi should be ok. Try it and let me know how it works out, dumass.  

[Snowbird]

http://www.rma.org/tire_safety/tire_maintenance_and_safety/tire_safety_brochure/tire_care_and_safety.cfm#inflation

Persons who do mount tires must have the right equipment, the right training and the right information before proceeding. Never exceed 40 psi to seat the beads. Always use a restraining device when mounting a tire on a rim, and be sure to stay back from the tire when inflating it. Make sure to follow the inflation instructions. Contact the Rubber Manufacturers Association at (202) 682-4800 for proper mounting and demounting information.

This is referring to car tires, but motorcycle tires I am sure are little different.

[Uncle Bob]

hehe, people that haven't changed tires for a living always cringe at the high bead-seating PSI.  

You have three choices when you have a difficult to bead tire, assuming you do things correctly (lots of lube).....you can increase the PSI, or you go to a forum and whine about it, or you get a different tire that seats easier.

150psi is not out of the norm

of course tire manufacturers tell you to keep the psi low.  Its called liability.  They also tell you to never exceed the speed rating of the tire.

[Busy Little Whiner]

So, according to your theory, 1000 psi should be ok. Try it and let me know how it works out, dumass.  

1000 psi is not OK... It only takes about 380 psi blow a tire off a rim... 120 psi ain't going to do nothing but
seat the bead... you mentioned that a carcass is even permanently marked "not to exceed a certain
pressure" on the tire side... well where's this carcass you speak of???  

[Woodys Euphemisms]

hehe, people that haven't changed tires for a living always cringe at the high bead-seating PSI.  

You have three choices when you have a difficult to bead tire, assuming you do things correctly (lots of lube).....you can increase the PSI, or you go to a forum and whine about it, or you get a different tire that seats easier.

150psi is not out of the norm

of course tire manufacturers tell you to keep the psi low.  Its called liability.  They also tell you to never exceed the speed rating of the tire.

Yep.  

Ever been to a show where they inflate a tire till it explodes ?  Takes a lot more pressure than most people realize.

[Woodys Euphemisms]

1000 psi is not OK... It only takes about 380 psi blow a tire off a rim... 120 psi ain't going to do nothing but
seat the bead...

Yep again.  

[Snowbird]

Yep.  

Ever been to a show where they inflate a tire till it explodes ?  Takes a lot more pressure than most people realize.

And so? How do you know that 120 or 150 psi doesn't do internal damage that doesn't show up until that day when you're running 70 mph for an hour or so?

This discussion reminds me of the one about using a propane heater inside an enclosed garage. All the industry experts said "Don't do it, no way, no how," yet a handful of ex-spurts from ST.N said, "Don't worry, be happy."  

In the end, fuk yas.    Now, about ABS... hopefully, it'll save yer asses.  

Oh... and no way, no how are MY tires going to see over the recommended max to get them to seat. YMMV.

[highside]

And so? How do you know that 120 or 150 psi doesn't do internal damage that doesn't show up until that day when you're running 70 mph for an hour or so?

Possibly because half the tires that get mounted at dealerships see this kind of pressure? I am willing to do a lot of bouncing and even a ratcheting tie down to seat a bead without getting a lot of pressure, mainly because my compressor sucks and it is faster than waiting for it to inflate to that level. Dealerships do not have that kind of patience and they DO have really good compressors.

[Busy Little Whiner]

Oh... and no way, no how are MY tires going to see over the recommended max to get them to seat. YMMV.

Yep... clear case of the scaries...

[def38]

Not so. The cords and carcass are designed to inflate to a maximum, fully inflated size and the carcass is even permanently marked not to exceed a certain pressure on the tire side. It is marked for a reason, and that reason includes over-inflating to "pop" the bead.

Whether road hazards or over inflation pose the more serious hazard is immaterial.

Extreme pressures may risk delamination or ply seperation which may not be discovered until high speeds are reached...

[Snowbird]

Extreme pressures may risk delamination or ply seperation which may not be discovered until high speeds are reached...

This is the sort of scenario I had in mind. It correlates with the manufacturer warning not to apply full power, high cornering loads, etc for the first hundred miles. Tire rubber needs to complete curing... especially where the tread attached to the carcass and where the tread joins itself where it completes it's wrap around the tire.

[Busy Little Whiner]

Extreme pressures may risk delamination or ply seperation which may not be discovered until high speeds are reached...

Not extreme pressure but extreme heat will cause ply separation... a problem associated with low tire
pressure... so mind those tire pressures and keep them up...

[Woodys Euphemisms]

Not extreme pressure but extreme heat will cause ply separation... a problem associated with low tire
pressure... so mind those tire pressures and keep them up...

Correct once again.   I would add to that, not just low tire pressure but high speeds as well.

Stop being a chicken, Snowbird.  Give that sucker some air.