I think they are #1,because My friend has the #2`s(bigger ones),but I didn`t notice any difference in riding between the two types. Except that the bigger ones are more money. Fett Bros. told me the only reason they made the bigger ones was because some people had requested them,but the #1`s were the exact size they had decided on after extensive testing.
In my opinion these made a huge difference,especially with the stutter bumps. You can contact me at camarrow_69@hotmail.com, if interested.
Thanks,Jim
