Originally Posted by Serzoni
The high traction arms (31420) are actually ofter than the carbon arms that come stock on the cyclone/pro4.
http://www.hpiracing.co.jp/contents_...up_e/0410.html
"We used more flexible material for this high traction suspension arm set than the kit standard one. It is a perfect arm for poor grip surfaces or aggressive driving style. For a high-grip track, try this suspension arm only for the front to adjust the steering characteristics as one of useful settings. "
Pretty much all of the components that come on the "S" are more flexible. The front c-hubs are VERY brittle compared the standard, though.
Thanks for the help guys. I located some in stock here in the states. I used to run 20% arms on my RDX and it helped with traction on some tracks on those hot summer days down here. It also minimized breakage to next to none.