Known for its sleeping pad pumps, Flextail also makes a handy bike pump. It can inflate tires up to 6.9 bar (100 PSI), which is enough for road bike use. The pump reaches 5.5 bar in about 80 seconds. On a single charge, you can inflate two 25 mm road bike tires to 5.5 bar. Gravel and mountain bike tires have a larger volume but require lower pressurecheck the additional images for examples of how many tires the battery can handle at different sizes and pressures. - Compatible with Presta and Schrader valves (the latter is the standard car valve), and includes an adapter for inflating balls - Charging time: 25 minutes - Can also be used as a rear light, though this function uses the pumps battery and reduces available pumping capacity - Package includes: pump, charging cable, saddle post mounting brackets, user manual, adapters for Schrader and Presta valves and balls, and a protective silicone cover In tests, the pumps inflation speed dropped by only 10% after filling 200