GrimmTools - Universal Bicycle Tire Inflator for Presta and Schrader valves Presta and Schrader universal auto-select chuck allows inflation of any tire with ease. No need for Presta Adapter. Ergonomic rubber coated trigger. Precision pressure gauge measures up to 150 PSI Long 18" heavy duty hose for maximum maneuverability while inflating Integrated pressure relief button. 1/4 Quick Plug included in Packaging. This tool requires an air compressor to use. Great for tubeless tire installation in both mountain and road bikes