The design of the nose wheel system is not good. There is a 3/8 bolt that has two jobs. It serves as the axle and also adjusts the preload of the bearings. If enough pressure is placed on the nose wheel, the axle will bend and increase the preload on the tapered bearings. If the pressure is great enough, the bearings will lock up and the nose gear folds. IMO, it is the main cause of nose gear failures.
RV-7 builder Ramona, CA.
Free prop balancing for Vanís owners.