The use of HT0 steering arms created more problems than they fixed. First of all, if there has been a issue with steering ballcups rubbing on the rim, HT0 arms made the issue worse. I first did not notice that when i switched to HT0 during a race, which resulted in a worn down, ripped ballcup and race DNF.
The second issue is the targeted increse in steering smoothness. The new +1 / +2 arms and the HT0 are made to achieve the same effect. AE states for the HT0 arms that they “make the steering less aggressive off center with a smoother turn-in feel, which helps improve drivability in high-traction conditions” and for the +2 arms “+2 steering arms will have the smoothest and least aggressive feel”. So basically, they are designed to tune the steering feel in the same direction.
Geometry wise both HT0 and +2 arms are longer, but +2 arms move the link more inward, closer to the axle or rather forward, away from the rim:
HT0 move the link location in the opposite direction, closer to the rim (causing desaster on many rims, including AE rims) or rather backward:
How can parts, that aim for the same goal but move stuff in oposite directions achieve the same effect? Of course, they don’t. With subject to recency bias, i had a HT0 equipped B74.1 that i bought used which was way too aggressive on new EOS carpet and switched to +2 arms. This change calmed the car down noticeably. My bottomline ist, that the new +2 / +1 arms supersede HT0 arms. There is no scenario where i would use HT0 arms again. +2 / +1 arms work collision-free with most rims and may even remedy issues with rims that normally would rub ballscups with kit arms and they really smooth out initial steering.
