Description
The Advance GL661A is a heavy-duty, all-position radial tire designed for both on-road and off-road applications. It is particularly popular for military trucks, specialized heavy-haul vehicles, and expedition rigs. The 14.00R20 is a very large volume tire, it is highly sensitive to air pressure. For highway use, keeping them at the maximum rated PSI is necessary to prevent "cupping" or uneven wear. If you are using them with a CTIS, the GL661A casing is robust enough to handle low-pressure "airing down" for sand or mud. Often used as a Super Single upgrade for the M813, M923, or M939 series.
