The Blackburn Air Stick are excellent as they come in alu or carbon blow my road and mtb tyres to pressure just fine. As for petrol or gas station will fill your tyres just fine as they're design to fill truck tyres to 100+ psi so no probs filling you road tyres. As for running you tyres at a lower pressure so not get puntures that not true as the recommended pressure is there to stop pinch flat,stop your tyre from rolling off the rim, etc the manufaturers design tyres so that they're at their most punture resistant at full pressure.