Looks a bit like tire inserts - basically foam rings you put inside the tire, common on mountain bikes. I just installed that on my bike, which not only protect

Looks a bit like tire inserts - basically foam rings you put inside the tire, common on mountain bikes. I just installed that on my bike, which not only protects my rims but also lets me ride home from the trail with a flat tire. https://www.bikeradar.com/advice/buyers-guides/best-tubeless-tyre-inserts/ https://www.bikeradar.com/advice/buyers-guides/best-tubeless...