We’ve been discussing this recently with a few riding buddies and we’re struggling to think what the disadvantages of running the following setup would be.
Take a light weight mtb tube and inject it with your choice of sealant. If necessary patch up the tube where you injected the sealant.
Fit the tube to standard tyre and rim and hey presto a tube that could be run at lower pressures and offer puncture protection. Giving you most of the advantages of a tubeless set-up but without the cost and it should make it easier and cleaner when wanting to change tyres.
Yes I’m aware that you can buy tubes already pre-filled with sealant but they tend to be pretty heavy, so have been ruled out. Total weight of tube and sealant should be less than around 200g.
Would the sealant prevent against pinch flats?
Your advise / experience on this is appreciated.