Altoz 5500056 All-terrain Track for TRX Model 766 Mower - This All-terrain Track is for use with the TRX Model 766 Mower. Low ground pressure and high traction are key to getting more jobs done with less damage. Limiting ground pressure reduces spinning, rutting, and damaging underground structures - especially on soft ground. The high traction from the TRX track system allows for better control, especially on slopes.