The Rapid Racer Products ProGuard Bolt-On Adapter Brackets are adapters to position the ProGuard Bolt-on mudguard for a perfect fit with your forks. For use with RockShox Lyrik and Pike forks when mounting the V2 ProGuard Bolt On mudguard. This adapter is not compatible with V1 ProGuard Bolt On mudguard which has a different mounting bracket. A must for a perfect fit & clearance.