this post was submitted on 28 Sep 2023
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At the risk of asking a stupid question (apologies), can you run a tube in a tubeless tire? A tube with some slime to help prevent punctures?
Probably not in your application.
What determines if you run a tube or not is the rim, not the tire itself. If you have a spoked rim it's most likely you will have no choice but to use a tube. The tire valves are different between tubes and tubeless rims. On a tubeless rim, the valve stays with the rim. Otherwise it is attached to the tube.
I guess you could theoretically install a tube anyway (after ripping out the existing valve stem) but it's not a great idea. Heat buildup from high speed riding and cornering may cause the tube to fail unexpectedly. You won't find anyone willing to take responsibility for it, either -- not the manufacturer of the tube, nor the tire, nor the rim/bike, since you used a combination of parts not designed for the task. (The tube's valve stem is not airtight against the rim, so if you blew a tube inside a tubeless tire on a tubeless rim, the tire itself would not leak air but the gap around the valve stem will.)
For future readers:
Yes. I've carried a tube instead of a spare on long haul adv rides. It's a reasonable backup plan, not a daily ride option.
No, it won't make you more puncture resistant, and you absolutely do not want sealant rolling around in a moto tire fucking up your balance and making life miserable for whoever has to eventually change it.