Have a niggling question about my tyres on my xtx. Tyres are pirelli diablos and are marked as tubless radials. Could or should these have an inner tube with the spoked rims. How can i tell without taking the tyre off. Also valve is leaking air around the nut against the rim. Can this be replaced without taking the tyre off if there is no innertube. Long story short "slow leak - cheap fix - does my tyre have an innertube"

Dave