GPM Racing 6061-T6 Alloy Front Steering Knuckles (Larger Bearings) for Arrma 1/5 Kraton 8S (MAKX021/V1)

Front steering knuckles overview

This alloy front steering knuckle set is an RC-scale replacement part designed for ARRMA 1/5 Kraton/Outcast 8S BLX platforms. Machined from 6061-T6 aluminium, the knuckles accept larger bearings than stock to increase contact surface and bearing preload options. Front hub nuts are aluminium 7075-T6 with an anti-loosening fastening detail using supplied 3×6 round head screws to keep the hub secure under heavy loads.

Installation notes: the knuckles provide three tie-rod mounting positions to tune steering roll and Ackermann characteristics without changing the steering linkage geometry. Bearings supplied are oversized relative to the original parts, so verify fit and orientation during assembly and check clearance with the brake and wheel hub components.

Tuning role: using stiffer alloy knuckles and larger inner/outer bearings can reduce deflection and improve steering consistency under high torque and rough terrain, making this a common upgrade for drivers seeking firmer front-end response.

Packing includes

• Front Steering Knuckles – 2pcs
• Grade 12.9 Black Cap Head Screws 4×38 – 2pcs
• Grade 12.9 Black Round Head Screws 3×6 – 4pcs
• M4 Lock Nut – 2pcs
• Aluminium 7075-T6 Front Hub Nut Red – 4pcs
• Oversized Outer Bearing 12x26x8 – 2pcs
• Oversized Inner Bearing 17x28x7 – 2pcs

Original Name / Part No:

ARA330558+ARA340158+ARA330582

Compatible Models

• ARRMA 1/5 Kraton 4X4 8S BLX Brushless Speed Monster Truck RTR-ARA110002
• ARRMA 1/5 Outcast 4WD 8S BLX Stunt Truck RTR-ARA5810
• ARRMA 1/5 Kraton 8S EXB 4X4 Roller Brushless Speed Truck-ARA5208
• ARRMA 1/5 Kraton 8S EXB AVC 4X4 RTR Brushless Speed Truck-ARA5808V2
• ARRMA 1/5 Outcast 8S EXB 4X4 Roller Brushless Stunt Truck-ARA5210
• ARRMA 1/5 Outcast 8S EXB AVC 4X4 RTR Brushless Stunt Truck-ARA5810V2

Choose this knuckle set when you need a durable 6061-T6 upgrade with larger bearing support and adjustable tie-rod geometry for firmer steering on heavy-duty 1/5 ARRMA 8S rigs; confirm clearance and torque settings during fitment.

Are these knuckles compatible with my ARRMA 8S Kraton or Outcast?

The product is listed as compatible with specific ARRMA 1/5 Kraton and Outcast 8S models shown in the Compatible Models block, verify your exact model code against that list before ordering.

What bearing sizes are provided in the kit?

The kit includes oversized outer bearings 12x26x8 mm and oversized inner bearings 17x28x7 mm as supplied items.

Which factory parts do these replace?

The knuckles replace the factory part numbers listed under Original Name / Part No: ARA330558+ARA340158+ARA330582.

What hardware is included for installation?

The package includes cap and round head screws, M4 lock nuts, 7075-T6 aluminium hub nuts, and the oversized bearings needed to fit the knuckles as supplied.

How do the multiple tie-rod holes affect steering?

Using different tie-rod holes alters the steering link angle and Ackermann behaviour, allowing you to tune turn-in and mid-corner steering without changing the linkage length. Write Product Review Please sign in your account before you can write any review. Sign In Close

Made to order: GPM Racing parts are shipped to us from GPM’s factory, so please allow around 14 days for dispatch.