Topeak Smartgauge D2 Prest/Schra 250 PSI If you're like us and sometimes checking your tire pressure can be a drag, but the Smartgauge makes it so easy. Topeak's Smartgauge has a Smarthead that automatically adjusts to work with Shrader and Presta valves. The LCD display can be programmed to show psi, bar, or kg/cm. An air release button allows for a quick fine tuning of tire pressure. Head: Smart Head Gauge: Digital - PSI, Bar, kg/cm2 Body Engineering Grade Plastic Capacity: Reads 250 psi / 17 bar Added Features: Rotating head Air Release Button Size (L x W x H): 10. 2 x 4. 5 x 3. 5 cm/ 4" x 1. 8" x 1. 4" Weight: 65 g / 2. 29 oz | Topeak | Smartgauge D2 Prest/schra 250 Psi Topeak | Smartgauge D2 Pres/schr 250Psi