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I will certainly update the thread if the problem reoccurs. Keep in mind that I only mow once a week and the original problem was intermittent so it could fail tomorrow or could last the season (especially if the tube does the trick). The problem did not occur the last time I mowed and I put a...

I agree gab. What you describe as "sideways strain" is quite plausible. I have stated that I am 300 lbs. and if I add that to the sideways torque, the age of the tires and rubbing against a barrier at times (I have steel borders [not plastic] around flower plots, the front shrubs and around the...

If it pops off again with the tube in it, I wasted $27.00 on a tube and will then opt for new tires. I am a homeowner and the mower is garage kept. The tires are not apparently dry rotted and pass the underwater test but 9 years is a long time even if it's shelf life.

I did inspect the bead and rim the first few times and I'm pretty sure I introduced some debris the second time I worked on it. I took it to the shop where I bought the mower for the tube installation. I don't know, but he probably looked the rim and tire over while he was inserting the tube for me.

Thank you all again. At this point I'm at a 'wait and see' phase but I did take note of the tire pair on Amazon for $132.99 ($142.30 after tax plus mounting). I don't think I want to try mounting them myself if I may have caused this issue with my lack of proper tools. "Wait and see" for me...

Not true, I did not have my mind made up when I joined this forum. I actually got my suggested solution from this thread. My original thought was to use X-Tra Seal Tire Bead Sealer as you can see from my original post. 'slomo' said "Take it to a car tire shop. Call prior to make sure they have...

:) Hahaha. OK, I could not "see the air coming from the tiny cracks in its sidewall". I saw the effect of the air escaping the tire by the bubbles that were formed and deduced that air was the cause.

In my opinion, the tube will keep the tire from coming off the bead. It is coming off because of many factors. Could be the yokes as 'bertsmobile1' suggested. The way it's occurring, my best guess is that the tire is OLD (I agree 100%) and when it's torqued by some side-ward or twisting...

Too many posts to address individually but thanks to all. I have said several times that the tire was holding pressure and I checked it often. Everyone that suggests the soapy water check... Done and done. NOT A SLOW LEAK, it pops off the bead. I installed a tube yesterday and I am done...

Well slomo, I'd have to say that the tires are good quality since they are the original 9 year old tires. I never had a problem with the other three, just this one and I think I probably glanced a barrier breaking the bead to cause the first flat. After that I probably pumped it back up and got...

Thank you all for your suggestions and recommendations. Everyone was helpful in some way. I will only be posting back here if something strange happens to that wheel/tire, but I don't expect to.

Thank you Forest#2. I truly appreciate you helping me understand the tube types. As I was looking around online I decided to call the place where I bought the mower years ago. They said they would put a new tube in for $27.00. I was sold, I took the wheel off the mower and took it to the shop...

I'm one or two troubleshooting steps away from going with a tube. If I need to break the bead to try the sealant, I may as well put a tube in instead and save a step. I don't mind spending $20.00 for a good tube, I do need to find out what replacement tube gets the valve stem hole to line up...

Thanks slomo. I'm a DIY'er and I understand that your suggestion would be quick, and easy but expensive. What if the problem is a warped or damaged rim that I cannot see? Then I've spend money on a new tire and the rim is the culprit.True, I could buy a new rim then and the problem will be...

Thank you MParr & Rivets, I will try the troubleshooting tips you suggest and they do make sense. I will add that when the problem occurs it seems to occur when I'm doing considerable maneuvering which is adding horizontal torque to the tire when I hit a dry, rough surface like the driveway etc...

You may be jumping to conclusions Forest#2 :). I am also 6'8" tall. That's me on the Hustler in my Avatar. I had to buy handle extensions to fit my legs under the steering arms. Yes, I could use to lose a few, but it ain't what it seems. For what it's worth, I do have a push mower that I use in...

Thank you MParr and Rivets. I do keep the tire pressure monitored and it is not leaking. It's good when I start mowing and at some point, POP, it's off the rim! I am 300 pounds and I'm sure that doesn't help. I did have a bead leak in that tire a few years back, I almost forgot about it. At...

I have a 48" Hustler Raptor SD for 9 years and over the past few years the rear tire comes off the rim, rarely but a total nuisance when it does. I have cleaned the bead but it still happens. I plan to pick up some bead sealant (X-Tra Seal Tire Bead Sealer 14-101) but I know that is really...

I have owned my Hustler Raptor SD 48" since 2014. Great Zero turn IMHO.