DNM Rear Shock, Heavy Duty – Grom 125 All Models DNM’s Heavy sprung rear shock for the Honda 125cc Grom. This shock features a 30% stiffer spring and adjustable rebound. This is the perfect choice if you push the limits of your Grom and need a heavier sprung rear shock. It also works great with custom stretched bikes. Key Features: 245mm Eye to Eye Adjustable rebound 800lb heavy duty spring 14mm Hardened Main Shaft Perfect fit and sleek red look Includes shims to fit all year models!