Originally Posted by
GlennR
Inflate the old tube and see where the holes are. If on the inside then its the rim tape of something in the rim.
Do you check the tire before putting a new tube in?
I've ridden in Scottsdale and there's plenty of thorns so flats are not surprising.
Yep, gotta find the root cause, starting with the location of the hole in the tube. Can be tedious. Might require multiple more flats to occur. Become diligent about tire and tube orientation on the wheel.