The gear ratio is 1:56 and the tool is driven with 1"D.
Two high quality 70mm long, Chrome Molybden
12V digital tyre inflator
Fully inflates tyres from flat to 30PSI in 4 minutes (based on 175 x R13 tyre)
Snap-in detachable backlit digital tyre pressure gauge, accurate to +/- 1 PSI (up to 50 PSI)
Displays reading in PSI, BAR and Kpa