Cane creek thudbuster quadra lt seatpost by adding the thudbuster lt rear suspension youll ride faster longer and stronger with better traction more control and less fatigue the performance relative low weight and simplicity make it the best suspension upgrade you can make to your hardtail based on a patented parallel linkage design the thudbuster lt provides up to 3 inches of active stiction free travel unlike telescoping suspension posts there is no initial stiction to overcomethe