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I'm running a Stan's Crest rim on the back of my crosser. I'm using tubes because I need to swap between road and off road tyres fairly regularly. I've been using the tyres at whatever their recommended pressure is (up to 100psi) but only recently noticed that this significantly exceeds the pressure limits the rim is labelled with (45psi I think but for a fatter tyre).
My question is, are these limits just for tubeless tyres blowing off the rim or are they something more structural?
Ta.
That is the maximum pressure no matter what tyre you have on it, it's an off road rim, never had more than 28psi in mine.
Stan's spec for the Crest is maximum pressure of 40psi - ride a higher pressures if you like - but rim/ tyre failure is generally sudden, catastrophic and will stop the wheel turning - bear that in mind on your next 50kph descent.
There are reports of the rim splitting with too much pressure, I assume that is why Stans publish limits for their rims. The limits are lower for fatter tyres, which is consistent with it all being about tyre carcass tension pulling the beads of the rim apart.
It’s the max recommended tubeless pressure for the rim. Anything more and it will explode off the rim. I know this from painful experience using 38mm tyres. 45 psi was fine anything more and I mean anything and it might be fine for a minute, an hour, maybe a day, but it would eventually blow-off.
Yup. Similar here, put slick tyres in my MTB for a while and some weeks later spotted the pressure limits. Stans Crest / Alpines iirc
Not worth taking the risk imo