This is a pack of two optional RPM Offset-Compensating Front A-Arms, in Blue color. If you’re anything like we are, keeping track of which offset wheel you have lying around for your Traxxas Slash 2wd or Nitro Slash and whether or not the wheel / tire has a front or rear offset can be a bit annoying. This is especially noticeable in the heat of the moment when you’re between race heats and need to slap something on the truck fast. The RPM solution is a simple one, the lengthened the front A-arms just enough to compensate for the difference between front and rear wheel offsets. Now you simply mount up all of your favorite tires on rear offset Traxxas (or RPM) wheels and never worry about different offsets again!