This thing skins around me. Great product. I use it to put the bead on my scooter tires that I remove and replace as a service to drivers here in Colorado. Motorcycle tires are great too. It even jacks up my service truck tires when I do that At 120psi tank pressure it will fill a van tire (225/70-15 or something like that) from 30psi to 40psi before dropping to 90psi" and kicking back in. The supercharger has more than enough duty cycle to deflate all 4 tires.I would rate this unit as "barely usable" for down and rewinding after track riding with STOCK tires.If you have inch tires, they probably don't have enough power to air them after you click the drove the road. It will work with standard tire sizes though, but you're better off with a medium or heavy duty kit in my opinion. For *my purpose* of mounting the bead on scooter and motorcycle tires, this is exactly what I wanted. It is also good for blowing out carburetors. The only complaint I have is that I had to buy some stuff to make it work. Installing it *as configured* gives you a black hose that expels air when the compressor is turned on. In order to attach things to it, you need to buy a compression fitting and an air canister. That's the only thing missing from the "kit". Otherwise great kit, great product, totally worth 5 (or 6) stars for this review. The best work Viyar! Buy brave people!