270mm Rear Gas Shock Absorber Suspension for 50 cc 70CC 90 cc 110cc 125 CC Dirt Bikes Pit Bike SSR Coolster Roketa SDG NST X-Treme Baja Rear Gas Shock. Top Quality Guaranteed. Rear Gas Shock for 50-125cc Dirt Bikes Shock Diameter: 2.8"; Spring Diameter: 12mm; Mounting Hole Spacing: 270mm; Please check pictures and specifications for compatibility