I would use this 150 psi static regulator on a small 10 pound beer keg CO2 tank. (Link below) Mount it in the bed so you can pull it out and air up tires. It will blow a train horn without fade all the way till it's empty. Norco swaps me a full tank for 8 bucks.
http://www.polyperformance.com/shop/Poly-Performance-CO2-Fixed-Regulator-p-297.html
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http://www.polyperformance.com/shop/Poly-Performance-CO2-Fixed-Regulator-p-297.html
Sent from my iPhone using Tapatalk