Sealant in inner tubes: what's the difference? I was thinking of converting my wheels to tubeless but my rims and tyres are not tubeless ready. I just recently learned that I can add tyre sealants into inner tubes. Can it prevent pinch flats like the normal tubeless setup?
Putting sealant in your tube does nothing to prevent pinch flats. (The long gashes caused by pinch flats would normally be too big for the sealant to handle, at least reliably.)
Putting sealant in a tube adds to the weight of the tube, rather than replacing it as in tubeless.
Likewise, with sealant in a tube, you have all the rolling resistance you already had with the tube, plus more energy cost to turn the wheel due to the sealant. (Bicycle Rolling Resistance tested this.)