once i put the tube in some weird way and the valve stem made a huge
bump
in the outside of the tire, though that was probably on an older bike
with schrader valves.

you could not see it on the outside of the tire but it was harder in
that spot and you
would definitely feel it every time the wheel turned.

i think what i did was to get the valve between the wheel and the tire
somehow.


wle.