Traxxas Blue Aluminum Axle Carriers (L&R) are optional stub axle carriers, and you get two of them. A stub axle carrier holds the wheel axle and ties the wheel into the suspension. The 1.5° carriers fit the Rustler 4X4 VXL Ultimate, Slash 4X4 VXL Ultimate, Nitro Slash and Stampede 4x4.
Each carrier is machined aluminum with the strength of 6061-T6 alloy, and the finish is anodized. The carriers do not compromise the high performance suspension geometry.
Also in the box:
bought this after i broke the stock rear stub axle carrier. the aluminum carriers are a great upgrade, havent let me down yet.
I tried going with non-Traxxas parts and failed. The axle carriers' geometry has to be spot on or the axles will rub at full droop or the wheel camber will be off. Every aftermarket one I got had issues. Naturally, the Traxxas axle carriers fit perfectly and give perfect wheel camber.
Traxxas Slash 4WD
If you're looking to get rear axle carrier hubs, dont waste your money on others. These fit perfectly and are nicely machined. Totally worth the extra bucks, you won't regret it! A++