The 2018 Ram 1500 ST Regular Cab 4x2 6'4" Box's towing capacity is rated at 4155 kg (9160 lbs) / 726 kg (1601 lbs). The 1500 ST Regular Cab 4x2 6'4" Box wheels measure 17-inch in diameter.

The 2018 Ram Ram 3500 ST Regular Cab's towing capacity is rated at 14157 kg (31211 lbs) / 1851 kg (4081 lbs). The Ram 3500 ST Regular Cab wheels measure 18-inch in diameter. The size of the Spare ...