The ofna front shocks I have are just a tad longer than the stock traxxas shocks. Anything more wouldn't bolt up without binding up the pivot balls from my experimentation. If the UE shocks actually are OFNA rear shocks with shorter shafts, I would think the bodies would bottom out on the spring retainers before full suspension compression with the shorty shafts ecause the bodies are too long. My total length from center to center of the shock eyes is 115mm. The measurement from the center of the top shock eye to the top of the rubber shaft boot is 45mm. My bet is that the UE shocks measure exactly the same.