Keller Can-Am Commander Ball JointA More Robust Ball Joint When your Defender hits a big bump, it can push a ball joint right out of the A arm. Thats because theyre only held in by a small snap ring. Kellers original two piece ball joint design eliminates the need for a snap ring and boosts stud thickness over stock. When you upgrade to our Can Am Outlander Keller Ball Joints, you can enjoy harder rides with bigger tires without worrying about blowing out your housing. Boost Your