Is running a 20c tyre on a 25c (319) rim on the road as stupid of an idea as I think it is?
If by 319 you mean the Mavic A319, the smallest I managed is 23c and that just about as far I would comfortably go.
@edscoble started
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Is running a 20c tyre on a 25c (319) rim on the road as stupid of an idea as I think it is?