Standard thickness tube. A light spare. Save your knuckles and buy a valve stem fishing tool.
2mm thick rubber Straight Metal Valve Stem
Suits (but not limited to) the front tyre of the following Adventure Motorcycles.
*Note While tubes are obviously not necessary for tubeless rims, it is possible to damage a tubeless tire in such a way that the tire cannot be repaired or plugged. That is when carrying a spare tube along (and having the necessary tire changing tools and tyre patches/sleeves) can be a lifesaver. Having a tube fitted in advance guards against pinch flats.
If you only carry one spare tube, we recommend carrying a front tube as the larger diameter front tube will fit the front and rear tyres. While not perfect for the rear tyre, it will get you out of trouble.