Traxxas XRT / X-Maxx WideMaxx Adjustable Lower Suspension Arms – Multi-Position Shock Mounts

These custom lower suspension arms were designed as replacements for the Traxxas XRT front and rear lower arms.

The XRT uses the same TRA7893 and TRA7894 lower-arm geometry found on an X-Maxx equipped with the TRA7895 WideMaxx suspension kit.

Unlike the original arms, this design includes multiple lower shock-mount positions. Moving the lower shock pin between the available positions allows you to experiment with shock angle, suspension leverage, ride-height response, spring feel and damping behavior.

The arms have been printed in PETG and successfully installed on my Traxxas XRT, as shown in the photos.

FEATURES

• Fits the front or rear suspension

• Separate left and right versions

• Multiple lower shock-mount positions

• Uses the original suspension mounting locations

• Designed around TRA7893 and TRA7894 arm geometry

• Compatible with the original suspension hardware

• Printed and installed prototype shown in the photos

COMPATIBILITY

Confirmed by physical installation:

• Traxxas XRT

Expected compatibility based on the shared OEM arm geometry:

• Traxxas X-Maxx equipped with the TRA7895 WideMaxx suspension kit

Not compatible with:

• Standard X-Maxx suspension without the TRA7895 WideMaxx kit

• Traxxas Maxx or WideMaxx 1/10-scale models

OEM reference parts:

• TRA7893 – Lower Right Front/Rear Suspension Arm

• TRA7894 – Lower Left Front/Rear Suspension Arm

X-Maxx WideMaxx compatibility is based on the shared OEM suspension-arm references and has not yet been physically test-fitted with this printed design. Feedback from X-Maxx owners is welcome.

MATERIAL RECOMMENDATION

The prototype shown was printed in PETG and is suitable for assembly checks and controlled testing.

For aggressive bashing, large jumps or high-power setups, an impact-resistant nylon such as PA12 or CoPA is strongly recommended. ABS or ASA may also be used, but nylon is preferable for its combination of toughness and flexibility.

Use substantial wall thickness around the pivot points and shock-mount holes. Do not rely only on high infill for strength.

INSTALLATION AND SAFETY

Use the same shock-mount position on both sides of the vehicle.

After installation, check the entire suspension movement and confirm that there is no shock binding, driveshaft binding, chassis interference or tire contact.

This is a load-bearing 3D-printed suspension component. Inspect it before and after every run and replace it immediately if cracks, deformation, elongated holes or layer separation appear.

TESTING STATUS

• Printed and installed on a Traxxas XRT

• PETG prototype fitment confirmed

• X-Maxx WideMaxx compatibility based on shared OEM geometry

• Long-term hard-bashing durability testing is still in progress

This is an independent custom design and is not manufactured, sponsored or endorsed by Traxxas.