Question:

Is there a requirement on the size of traction bar rod ends I can put on my Pro ET truck?

Answer:

Yes there is, in the 2019 NHRA Rulebook in the General Regulations section 21, pages 17-18, 3:5 Traction Bar Rod Ends it reads “Minimum requirement for rod ends on the front of all ladder-bar traction bars is ¾-inch steel.  A rod end strap to keep ladder bar secured in the event of rod end failure mandatory in all classes.  All traction devices that are not attached at front (i.e., slapper bars, etc.) must have U-bolt or strap to prevent them from coming in contact with track.”