I have been running big tires (38.5 sx's-39.5 irocs) and full hydrolic for a couple years running stock trunion bearings the only problem I ever had was I jumped a full cab 96 Taco 2.7 with leaf springs aprox. 2 ft off the ground landed mostly on the front and bent the pins that go threw the top bearing. I have since upgraded to the 25mm pins and have jumped it several times with no problems. The axle is under my buggy now were it see's a lot more abuse in competitions and worse situations. Thanks