Rear Gas Shock Absorber Suspension for 50 cc 70cc 110 cc 125cc Dirt Bikes Pit Bike Rear Gas Shock Absorber Suspension. Fits 50cc 70cc 110cc 125cc Dirt Bikes. Shock Diameter: 2.56". Spring Diameter: 11mm. Mounting Hole Spacing: 280mm. Please check pictures and specifications for compatibility.