So, 2 extra squeezes, 2 tyres (assuming you're not on a unicycle) 4 squeezes per ride extra. Let's say you ride 5 days a week and have done so for 10 years, that's 10400 superfluous squeezes each taking 1/2 second which equates to 1 hour, 26 minutes and 40 seconds of your life you've wasted unnecessarily squeezing bicycle tyres.