Apart from the lack of tyre hooks of course.
But seriously, as much as I want the new Propel, its Cadex hookless rims put me off. Your experience just reinforces my view.
Moderator: robbosmans
Apart from the lack of tyre hooks of course.
Eff me. So a top tire from an industry leading brand goes on nice and snug, everything else to spec and in good order, but the tire still blows off. What's a guy supposed to do? So much about this industry makes me wonder if we aren't guinea pigs for some company's beta project. Sticking with hooks - forever.stjepan wrote: ↑Thu Feb 09, 2023 7:29 pm...Mr.Gib wrote: ↑Thu Feb 09, 2023 7:15 pmI just hate seeing this. Guess I will abondon my plans to go hookless.
Yes, interesting that the blow-off happened at the valve, but so what? Even if the tire wasn't properly seated (which I doubt), it shouldn't even be possible for it to go over the top, certainly not at the stated pressure. Rather, the tire should settle in place after a couple of rotations on the road. Something is seriously messed up with that tire or less likely the rim.
Question, was the tire too easy to get onto the rim? The OP has lots of nice wheels and I assume knows what a tire that is too loose feels like, and how to properly install?
To your question - it wasn't too easy to fit them, I had to resort to tire levers in the end to get them on completely (both tires).
wheelsONfire wrote: When we ride disc brakes the whole deal of braking is just like a leaving a fart. It happens and then it's over. Nothing planned and nothing to get nervous for.
I know what you mean. For a while, was riding with Roval CLX50s which are tubeless compatible WITH hooks and still found that once the tires fall below a certain pressure like in a flat, the beads don't stay locked. This lack of a standard for wheels and tubeless tires to ensure they are safe as a system is ridiculous. Imagine if this persisted in the auto industry...Mr.Gib wrote: ↑Fri Feb 10, 2023 2:35 amEff me. So a top tire from an industry leading brand goes on nice and snug, everything else to spec and in good order, but the tire still blows off. What's a guy supposed to do? So much about this industry makes me wonder if we aren't guinea pigs for some company's beta project. Sticking with hooks - forever.stjepan wrote: ↑Thu Feb 09, 2023 7:29 pm...Mr.Gib wrote: ↑Thu Feb 09, 2023 7:15 pmI just hate seeing this. Guess I will abondon my plans to go hookless.
Yes, interesting that the blow-off happened at the valve, but so what? Even if the tire wasn't properly seated (which I doubt), it shouldn't even be possible for it to go over the top, certainly not at the stated pressure. Rather, the tire should settle in place after a couple of rotations on the road. Something is seriously messed up with that tire or less likely the rim.
Question, was the tire too easy to get onto the rim? The OP has lots of nice wheels and I assume knows what a tire that is too loose feels like, and how to properly install?
To your question - it wasn't too easy to fit them, I had to resort to tire levers in the end to get them on completely (both tires).
if this is true... well this is the answer.
My tires are 28mm, they are compatible.
To my untrained eye the wheel seems to be fine and it is almost brand new (10 rides maybe in total).joejack951 wrote: ↑Wed Feb 22, 2023 3:51 pmJust curious, but as a possible outlier cause of an issue like this, have you checked the roundness of the wheel? If the wheel were an exaggerated egg-shape you could easily imagine a lack of proper tension across the narrow portion. If your wheel was say ~1mm out in radial true there would also be a lack of tension at that spot, but much less noticeable.
What is the range? I seem to recall 65psi being around the maximum for road hookless. I did google the AR 35 and can't find a single reference to max pressure.
73 psi is max pressure for hookless. It could be that the tire gauge isn't accurate, there's always that. I have a separate digital tire pressure checker, should employ it more often in the future.AJS914 wrote: ↑Wed Feb 22, 2023 7:26 pmWhat is the range? I seem to recall 65psi being around the maximum for road hookless. I did google the AR 35 and can't find a single reference to max pressure.
It could also be that your tire gauge isn't accurate and you are on the edge of what is acceptable. Or this particular tire is defective (in diameter).
Even if a pump is off by a few psi, or a gauge is inaccurate, surely there is adequate overhead beyond the max 73 psi as a safety margin for just this type of error? The tubeless and/or hookless tire/rim system is this idustry is still a bit of a mess. I don't know if it's bad design or bad manufacturing or a combination of both, but these blow-off events should not be happening.
wheelsONfire wrote: When we ride disc brakes the whole deal of braking is just like a leaving a fart. It happens and then it's over. Nothing planned and nothing to get nervous for.
Read that the ISO testing for hookless rim/tire testing is 10% safety margin, which doesn't seem that safe at all. Hooked tubeless testing is somewhere in the region of 40-50% for redundancyMr.Gib wrote: ↑Thu Feb 23, 2023 10:06 pmEven if a pump is off by a few psi, or a gauge is inaccurate, surely there is adequate overhead beyond the max 73 psi as a safety margin for just this type of error? The tubeless and/or hookless tire/rim system is this idustry is still a bit of a mess. I don't know if it's bad design or bad manufacturing or a combination of both, but these blow-off events should not be happening.
I admit to getting more paranoid by the week even with my hooked wheelsets. What happens if a front tire blows off at 80 km/h on some snaking descent? Very small odds, but it is going to happen to someone.
That's a joke. Inflate in a cool room, ride in the hot sun - 10% is nothing. I have trouble imagining a group of ISO officials sitting around and deciding in good faith that 10% overhead should be fine for a product on which the users life depends. This just doesn't smell right. I wonder if there was some industry input on this.yinzerniner wrote: ↑Thu Feb 23, 2023 11:47 pmRead that the ISO testing for hookless rim/tire testing is 10% safety margin...
wheelsONfire wrote: When we ride disc brakes the whole deal of braking is just like a leaving a fart. It happens and then it's over. Nothing planned and nothing to get nervous for.