We have selected the most popular knuckle kits for you to choose from. All of our knuckle kits come complete with Proper ack upper arms, all of the needed bearings, and hardware for installation.

Ultra light knuckle kit
An ultralight option with carbon fiber upper and lower arms, and aluminum bodies. All of the lightest parts making it the ideal knuckle for rear steering!
Axial 35.5g /8mm 40g

Light Knuckle kits
This kit is configured as a Sporty or Pro front knuckle, it keeps the weight low and has previsions for our brass knuckles as found here
Axial 48.5g / 8mm 52.5g

Medium Knuckle Kit
A great option for a front axle on a light weight rig to keep the bias towards the front. Would be recommended for a Class 1 or Class 2 truck
Axial 110.5g / 8mm 119.5g

Heavy Knuckle Kit
The ideal setup for a Class 2 truck, this will get you the maximum amount of weight that you can fit inside a 1.9 wheel.
Axial 167.5g / 8mm 176g

Ultra Heavy Knuckle kit
Ultra heavy knuckles are perfect for the front steering axle on a C3 truck, keeping the weight bias towards the front and compensating for the extra weight of the added rear weight of the typical C3 rig.
Axial 219g / 8mm 227.5g


Each kit come with two knuckles, enough to do one axle per kit.