Larger tires and heavier loads can leave your 2025-2026 Ram 2500/3500 6.7L Cummins feeling sluggish, and the right rear gear ratio helps restore lost performance and drivability. Our Rear Gears selection is built to match your tire size and use case, whether you're towing regularly or running a taller aftermarket tire. Properly matched gearing improves acceleration, reduces strain on the drivetrain, and keeps your speedometer and shift points accurate when paired with the correct calibration. Whether you're regearing solo or as part of a complete gear package, these components restore the performance your Cummins is capable of. Shop our top tier selection of rear gears today!