Tamiya OPTIONS Front Unit HOP-UP OP-671 TT-01 One-way

Basic specs: One-way housing (L/R), ball differential ring gear, bearing spacer, etc. set When the power is on, it draws out traction, and when the power is off, it cancels out the difference in rotation between the front and rear wheels, achieving cornering without stalling. Built-in one-way boring for left and right creates even smoother rotation. *For TT-01R, it is necessary to replace the cup joint with OP.590 TB-01 reinforced front one-way cup joint.