It's much more of a thing with tubeless compatible rims as there's a little retaining shelf for the (usually tighter with tubeless tyres) bead to sit on, so that if the tyre deflates it stays in place and you can just pump it back up, it does mean they can be harder to get in the right place to begin with though. Some guy keeps bringing me a carbon rim that refuses every tyre unless you give it way too many PSI, I think I'm going to have to retape it this time though, does not want to seat.
It's much more of a thing with tubeless compatible rims as there's a little retaining shelf for the (usually tighter with tubeless tyres) bead to sit on, so that if the tyre deflates it stays in place and you can just pump it back up, it does mean they can be harder to get in the right place to begin with though. Some guy keeps bringing me a carbon rim that refuses every tyre unless you give it way too many PSI, I think I'm going to have to retape it this time though, does not want to seat.