I am very dirty ...
after changing the tube on the rear tire of my bicycle ... twice this afternoon.
Brand X - Initial bad tube had a pinhole near the valve stem.
Brand Y - First replacement tube (the spare I had been carrying on the bike) had a pinhole in almost the exact same place ... which I only discovered after getting very dirty in changing the tube and putting the tire back on the bike and everything.
Brand Z - Second replacement tube holding air ... so far.
Total time elapsed == approximately two hours.
My bicycle mechanic skills == almost none.
My "Sheldon Brown"ness == 0.01%
Brand X - Initial bad tube had a pinhole near the valve stem.
Brand Y - First replacement tube (the spare I had been carrying on the bike) had a pinhole in almost the exact same place ... which I only discovered after getting very dirty in changing the tube and putting the tire back on the bike and everything.
Brand Z - Second replacement tube holding air ... so far.
Total time elapsed == approximately two hours.
My bicycle mechanic skills == almost none.
My "Sheldon Brown"ness == 0.01%
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