Machined Steel Underdrive Differential Gears

These heavy-duty 35-tooth ring and 10-tooth pinion differential gears are machined from high-quality steel for unsurpassed strength and durability. They are designed to underdrive the axle in which they are installed, causing the drive wheels to spin slower. Available in standard, underdrive and overdrive configurations, they allow you to tune your TRX-4^® or TRX-6^® for greater climbing agility.