Originally Posted by Stefan-Hpi Uk

To be ohnest, theres not a great deal of difference at all in performance over the Old arms. If you are breaking the new ones alot then go to the old skool ones and give them a try

Originally Posted by RCFREAK

As for older and newer arms, the newer arms seems to have a higher content of graphite..more gray in color, making them stiffer, for higher bite traction surfaces.


We have installed the older pro4 arms, which almost look more black in color, meaning more plastic... allowing more flex, usually used on lower traction surfaces.

IMO most wont feel the differance between the softer arms and stiffer arms, but rather see less breakage...