If you ride a mountain bike (with disc brakes), the last thing you need is a puncture. You might end up carrying the machine for miles (since fitting a puncture kit whilst up some mountain may not be very easy).
Today’s invention is a set of eight to ten, stiff rubber, G-section arcs.
These would be carried by clipping them around the thinner frame members until a puncture occurred in the tyre (pink).
Then each of these would be pressed into place, as shown, around a spoke.
These would support the wheel rims whilst protecting the tyre from further damage and allow a return home, under pedal power, before bad weather can cause any additional risk.