Don't let this diminutive pump fool you: SKS' Airboy has big lungs and it's ready to fill your tires quickly. Light and tough, this high-pressure pump fits in your jersey pocket easily and fills your tires up to 115 psi. The unique 2-chamber/2-plunger pumping system provides high pumping efficiency so you get back to your ride quicker. And, at only 62 grams, you'll forget you have this little bad boy when you're not using it.