Never be without a reliable low-pressure tire gauge for your bike. This rugged air gauge is designed for use on Presta valve equipped bike tires that require low PSI for max performance - such as tires common on fat bikes, downhill mountain bikes, and Enduro racing bikes. This air gauge has been performance tested on the rugged trails of the Rocky Mountains & calibrated to ANSI B40.1 standards (1.5% Mid Scale) for maximum accuracy in the 10-20 PSI range. Specifications: Dial: Analogue 2 inch, Glow-in-Dark Working Range: 1-30 PSI Max Accuracy Range: 10-20 PSI Calibration: ±1.5% (Mid Scale) Certification: ANSI B40.1 Valve Type: Presta* Storage Case: Included * For Presta valve stems only, does NOT work with Schrader valve types. Recommended Use: Fatbikes Enduro Racing Technical MTB (Low PSI) Key Features: Optimized for low-pressure bike tires (Max 30 PSI) - performance tested & calibrated accurate to ANSI B40.1 standards (1.5% Mid Scale), ensuring quick & accurate pressure readings without relying on batteries (for use on Presta valves only, NOT compatible with Schrader valves). Large, 2" glow-in-dark dial - features easy-to-read low PSI scale (0-30 PSI range), providing precise readings that lock-on to the dial face until the pressure reset button is pressed to zero reading. Equipped with a built-in bleeder valve to release air from overinflated tires & fine-tune your tire pressure. Rugged durability - feels solid in the hand & shielded by our shock-resistant rubberized gauge head cover, keeping the gauge protected from drops & vibrations, the 90-degree direct Presta valve nozzle lets you easily get in between the bike wheel spokes to measure tire pressure with ease. Superior performance - compact & portable design easily stores away in your riding bag or tool kit, so you can always keep your gauge packed for every ride. Includes a hard shell protective zip case to keep your air gauge protected & safe when not in use. A must-have for your bicycle tool kit - enjoy longer-lasting tires, improved traction, & superior handling on the trails thanks to properly inflated bike tires.