Got a tl/dr version of that?
Slightly less overweight old man unexpectedly receives pair of slightly worn 23mm Schwalbe Ones. Will 89kg of rider result in fiery/explosive death?
Depends innit...
Seriously though, tyres don't have weight limits as such.
89kg is chubbing-up nicely, but hardly 'merican.
23mm are fast becoming outdated on the road.
tl/dr You'll be fine, but fatter tyres are better on the road and thinner tyres are better if you're time trialling.
@mespilus started
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Got a tl/dr version of that?