I've built onto old hookless rims before and blown modern tyres up to decent pressure)-around 90/100 without too much bother. I think all of them have been wire bead so I would think these will be ok. Come to think of it I may even have a Panaracer PT Tourguard folding tyre on one rim with no noticeable issues. The rim is a Weinmann Alesa Alloy. Not sure if this is hookless or not though, can't quite remember.
I've built onto old hookless rims before and blown modern tyres up to decent pressure)-around 90/100 without too much bother. I think all of them have been wire bead so I would think these will be ok. Come to think of it I may even have a Panaracer PT Tourguard folding tyre on one rim with no noticeable issues. The rim is a Weinmann Alesa Alloy. Not sure if this is hookless or not though, can't quite remember.