I just bought this cool mini tire pump from Norshire (175psi and it has a very powerful compressor. Also it fills the shocks with an extra $7 quick release tire chuck! That's how I installed it that it automatically shuts off at 27 psi for my Fat Tire e-bike that takes seconds instead of minutes to refuel! I recommend this easy to use, accurate and stylish mini pump for everything! They research because all of these cheaper pumps are due to inferior compressors and components break!