Are you thinking of low-sidewall tires with side-by-side tubes? The run-flat tires I've seen had concentric inner and outer tubes.
The ultimate run-flat wheel:
bgr.com:NASA’s new titanium tires can never get a flat
It says titanium because that cool, but it's really a nickel-titanium alloy “shape memory alloy”.
__________________
.
.Without freedom of speech we wouldn't know who all the idiots are. -- anonymous poster
___________________
.
.Impossible is just something we haven't done yet. -- Langley Outdoors Academy
|