Parts/Suspension & steering/Suspension arms & hubs/RPM Losi Tenacity/Lasernut Rear A-Arm (Black) (2)
RPM Losi Tenacity/Lasernut Rear A-Arm (Black) (2)
RPM

RPM Losi Tenacity/Lasernut Rear A-Arm (Black) (2)

Part # RPM810921.0(2)
Where to buy
$15.25
AMain Hobbies
Seen Oct 12, 2026
$15.25Buy
Prices are as last seen at the store; stock is not tracked.

About this part

These are the RPM Losi Tenacity/Lasernut Rear A-Arms. Each pair of RPM A-arms is molded in a blend of nearly indestructible nylons and manufactured in the USA. These A-arms are designed to withstand even the toughest conditions, so you can push your vehicle to the limit without worrying about breakage. Performance has been improved by tightening the tolerances of the A-arm to create much smoother, more consistent suspension movement for reliable camber, caster, and toe angle settings. The suspension geometry is set to stock settings, which makes installing a set of RPM A-arms a simple swap with very little needed to be done to get back on the track.

RPM Tenacity and Lasernut A-arms feature a slim, aerodynamic shape that helps them transition up and over objects, rather than bluntly plowing into them. Designed with 30° leading and trailing edges, gives each A-arm a sleek look and feel. To provide additional strength where it's needed most, RPM has beefed up key areas such as the outer hinge pin support diameters by as much as 60%. This means that even less than perfect “incidents” won’t end your day of fun. Experience unparalleled performance on the track or off-road with these ultra strong, incredibly durable A-arms. Package includes two rear A-arms with hardware.


NOTE:
  • RPM Rear A-arms for the Losi Tenacity fit the following Tenacity platforms: U4 Lasernut, TT and DB. Also fits the following discontinued models: Pro, Monster Truck and T.
  • RPM Rear A-arms replace stock Losi LOS234017.

Reviews1.0 · 2 reviews

John Milleron RPM Losi Tenacity/Lasernut Rear A-Arm (Black) (2)

Product is good BUT REAR ARMS WONT WORK ON THESE CARS….??. FRONT ARMS ARE OK THO.. BIG PROBLEM THE STOCK LOSI REAR OUTER KING PINS ON DB PRO / TENACITY CARS ARE TOO SHORT AND DO NOT FIT OR WORK ON THESE REAR A ARMS DUE TO BEING THICKER THAN THE STOCK ARMS.. ** DO NOT BUY FOR REAR ON TENACITY CARS RPM SHOULD SUPPLY LONGER KING PINS WITH THIS SET SO THEY WORK…. I WASTED TIME & MONEY WIYH THESE REAR ARMS VERY UPSET

4 found this helpful
Jarrett MaltryVerified owneron RPM Losi Tenacity/Lasernut Rear A-Arm (Black) (2)

Got a set for my DBpro and just like the other review, they do not fit. The stock kingpin is about 1/8 inch too short. You either use one spacer and bend the arm, puting strain on it or you use no spacers and have an incredible amount of stop AND bend the king pin tabs on the arms to make it fit.

1 found this helpful

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