Just One Tube
I ride the new Africa Twin and prefer to travel as light as possible. A little obsessive in fact.
I carry a patch kit/spare glue/etc but from experience I would also like to take a spare tube. But just one lightweight (1mm?) one instead of the two heavier ones I typically carry.
It's only for an emergency situation when I really can't patch so it would only be required to allow me to trundle somewhere better.
Point being, which size tube as an emergency single tube for back/front would be best ?
AT tyre sizes : 90/90-R21 / 150/70-R18
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