Air tanks are vessels that hold compressed air that is then used to raise your vehicle. Air tanks come in many shapes and sizes but choosing the right one comes down to your vehicle's needs. If you have a heavier vehicle, a slightly larger tank might not be a bad idea. Sometimes space is an issue so a smaller air tank must be used. Running multiple smaller tanks is also a popular option. Keep in mind, the larger volume your tank system has, the more air you have to play around with between compressor fills but your compressor will also run for longer during it's refill cycle. If you need advice on what setup would work best for your vehicle, contact a Bag Riders air ride specialist for more information!