Each RPM A-arm is designed from the ground up to survive what was previously un-survivable. Massive support beams off to either side provide the support while 30° leading and trailing edges help improve transitions across ultra rugged terrain.
To help improve suspension tuning and reduce slop, we sized the hinge pin holes accurately, removing as much as 0.004” (0.1mm) of slop from the inner and outer hinge pins (see “Tech Notes” below for additional slop notes).
Additional A-arm clearance around the bell crank center-link allow for more up-travel without the severe impact the stock A-arms and center-link encounter at full suspension up-travel, reducing the likelihood of a broken center-link.
All RPM A-arms are molded from our ultra-durable blend of engineering grade nylons and backed by our limited lifetime warranty against breakage. With RPM on-board, your time on the trail will be time behind the wheel and not on the bench!
Notes: RPM Yeti XL A-arms replace stock Axial #AX31018. The Yeti XL we reviewed had A-arm hinge pins holes that were roughly .004” (0.1mm) – .005” (0.13mm) oversized from nominal. Furthermore, the hinge pins were roughly 0.005” (.13mm) undersized as well, creating as much as .01” (0.25mm) of combined suspension slop. Nominal sizes are 0.118” (3mm) and 0.1575 (4mm). RPM recommends checking your hinge pins for size and replacing them with on-sized pins (not available through RPM) for dramatically improved suspension performance above and beyond the improvements created when installing RPM A-arms.