How to Replace Rear Lower Suspension Arms on HP141/HP141S
By BEZGAR | Published: 2026-10-26
Category: How-to Guides
Learn how to replace the rear lower suspension arms on your HP141 or HP141S RC car with this step-by-step guide, including common mistakes and tips.
Quick answer
To replace the rear lower suspension arms on your HP141 or HP141S, remove the wheel and shock, unbolt the arm from the chassis and hub, install the new arm, and reassemble—checking that all screws are snug but not over-tightened.
Why replace the rear lower suspension arms?
The rear lower suspension arms are critical for maintaining proper rear suspension geometry. Over time, they can bend or crack from impacts, leading to poor handling and uneven tire wear. Replacing them with original spare parts ensures a reliable fit and function.
Tools you'll need
You'll need a small Phillips screwdriver, a hex wrench set (usually 1.5mm and 2.0mm), and a clean workspace. Having a magnetic tray helps keep screws from rolling away.
Step-by-step replacement process
- Remove the rear wheel: Place the car on a flat surface and remove the rear wheel on the side you're working on. Use a hex wrench to loosen the wheel nut, then pull the wheel off. Check the wheel nut for wear and replace if stripped.
- Detach the shock absorber: Remove the screw securing the shock absorber to the lower arm. Gently pivot the shock out of the way. Don't force the shock; if it resists, check for a hidden screw.
- Unbolt the lower arm: Remove the screws that attach the lower arm to the chassis and to the hub. Keep them organized by location. Note the screw lengths; using a wrong-length screw can damage threads.
- Install the new arm: Position the new lower arm in place and reattach it to the hub and chassis. Hand-tighten screws first to align everything. Do not over-tighten; you should feel resistance but not strain.
- Reattach shock and wheel: Reattach the shock absorber, then the wheel. Tighten the wheel nut securely, but avoid over-tightening. Spin the wheel to ensure it rotates freely without binding.
- Test the suspension: Press down on the rear of the car to check that the suspension compresses and rebounds smoothly. Check for any unusual play or binding. If the suspension feels stiff, re-check screw tightness and arm alignment.
Product facts
- Rear Lower Suspension Arms(14250B) for HP141/HP141S: These BEZGAR Rear Lower Suspension Arms (part number 14250B) are original spare parts designed to fit the HP141 and HP141S models. Using the original part ensures a direct replacement and proper rear suspension geometry without modification.

Rear Lower Suspension Arms(14250B) for HP141/HP141S
