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Author Topic: UNEXPLAINED FLAT REAR TIRE  (Read 826 times)

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Offline Redline1

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Re: UNEXPLAINED FLAT REAR TIRE
« Reply #20 on: September 27, 2013, 07:25:19 am »
No vavle leak, checked that one in the morning.
No CO2 cannister inflation, no sir.   :biggrin:

Could be as Bie and Smuggy says, a leak occured on the bead (sand) and corrected itself after it came of the rim, thats the only reasonable explenation at this point.  I have to say, when I checked the tire pressure in the morning, it was still the same as the previous weekend when we went for a ride, so it was not leaking up to that point. 



No
The valve did not seal after you checked pressure. Have seen this before, yesterday actually. I picked it up because I did the spit test. Replace the valve. It might happen again.
The tire then deflated slowly and got to a point where the vehicle weight or a bump pushed the bead into the rim well.

You should actually replace both the valve as well as the flexible rubber plug which carries the valve with every new  tubeless tire fitted. I know I always get puzzled looks when I ask at the fitment centre. If you have rigid valve plugs in your rim only replace the valve.

That makes sense. I have had the same problem and couldn't work it out, but now that I think back it sounds right. Thanks.
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Offline GIDEON

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Re: UNEXPLAINED FLAT REAR TIRE
« Reply #21 on: September 27, 2013, 07:37:45 am »
Also agree with the valve. Happend to me luckly not so drastic as yours.
Tire was fine but flat.
learned 2 lessons.
Always make sure you have the valve cap on.
And check the valve. and carry some extra.
 :thumleft:


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Offline Vis Arend

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Re: UNEXPLAINED FLAT REAR TIRE
« Reply #22 on: September 27, 2013, 08:22:10 am »
No valve leak, checked that one in the morning.
No CO2 canister inflation, no sir.   :biggrin:

Could be as Bie and Smuggy says, a leak occured on the bead (sand) and corrected itself after it came of the rim, thats the only reasonable explenation at this point.  I have to say, when I checked the tire pressure in the morning, it was still the same as the previous weekend when we went for a ride, so it was not leaking up to that point. 



No
The valve did not seal after you checked pressure. Have seen this before, yesterday actually. I picked it up because I did the spit test. Replace the valve. It might happen again.
The tire then deflated slowly and got to a point where the vehicle weight or a bump pushed the bead into the rim well.

You should actually replace both the valve as well as the flexible rubber plug which carries the valve with every new  tubeless tire fitted. I know I always get puzzled looks when I ask at the fitment centre. If you have rigid valve plugs in your rim only replace the valve.

Thanks lecap, makes sense, but I still do not believe that the valve leaked.  After I checked the pressure I did the spit test, nada leak.  Then I placed the valve cap back, it is one of those metal oukies that has the seal on the inside of the cap, so in my mind, if there was a slight leak, the valve cap should have stopped that.

What does make sense is that the wheel was deflated to such a point (the reason for the deflation still a misery),  that when I went through the bumps (there were three in a row just before the incident, with the last bump quite a hard one) that it pushed the bead into the rim well.   :thumleft:
   
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Offline Manic

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Re: UNEXPLAINED FLAT REAR TIRE
« Reply #23 on: September 27, 2013, 08:30:30 am »
Was die tyre orals pap, of net die onderkant op die pad  :peepwall:
 

Offline Vis Arend

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Re: UNEXPLAINED FLAT REAR TIRE
« Reply #24 on: September 27, 2013, 08:33:28 am »
Was die tyre orals pap, of net die onderkant op die pad  :peepwall:

 :laughing4:

Toe ek stop net onder.   :biggrin:
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Offline Manic

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Re: UNEXPLAINED FLAT REAR TIRE
« Reply #25 on: September 27, 2013, 08:39:44 am »
Was die tyre orals pap, of net die onderkant op die pad  :peepwall:

 :laughing4:

Toe ek stop net onder.   :biggrin:

Jy was lucky  :thumleft:  :imaposer:
 

Offline ETS

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Re: UNEXPLAINED FLAT REAR TIRE
« Reply #26 on: September 27, 2013, 09:06:26 am »
My guess would rather be that a little stone worked into the tyre between the rim and the tyre and it caused a slow leak--- mens voel mos nie altyd as die band pap word nie. When you hit the bump it deflated rapidly and then came off the bead. My 2c--- not a nice thing to happen.
If i had to explain you would not understand anyway......
 

Offline lecap

Re: UNEXPLAINED FLAT REAR TIRE
« Reply #27 on: September 28, 2013, 08:32:53 am »
There is a good chance that the tire was perfectly fine and inflated up until the bump. Happens a lot with tubeless tires when you go over a kerb. Sometimes without rim damage. A good old pothole has potential to do the same.
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Offline Draad

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Re: UNEXPLAINED FLAT REAR TIRE
« Reply #28 on: September 28, 2013, 07:30:04 pm »
blow out at 120 is not as severe as 80 but becomes the same as you slow down...had a front blow on me at 140 ( African twin ... and we all know how kak they are balanced to the front) and only started doing tar ballet at round 90. Managed to control the fully loaded Twin.. The Africa twin is also prob the most dangerous kak bike I have ever ridden and managed to save it.
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Offline Leo

Re: UNEXPLAINED FLAT REAR TIRE
« Reply #29 on: September 29, 2013, 10:11:33 am »
Could be a so called "impact puncture"

Happens when tyre is not inflated to specifications and it suddenly collides with a hard object like a stone/rock or even a pothole.

A leak at the vale will escape over time, no suddenly.  :thumleft:
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Offline Vis Arend

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Re: UNEXPLAINED FLAT REAR TIRE
« Reply #30 on: September 29, 2013, 10:15:23 am »
Could be a so called "impact puncture"

Happens when tyre is not inflated to specifications and it suddenly collides with a hard object like a stone/rock or even a pothole.

A leak at the vale will escape over time, no suddenly.  :thumleft:

Thanks, looking at all the comments, I came to the conclusion that it was most likely the cause of the flat.
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