The Halfords Suspension Shock Pump (400PSI) lets you precisely adjust air pressure in rear shocks and front suspension forks for mountain bikes. Featuring a large easy-to-read pressure gauge capable of providing readings up to 400PSI and an air release valve, this shock pump also comes with a flexible hose for easy valve access. Compact and lightweight, it ensures accurate pressure adjustments up to 400PSI. Buy your bike pumps at Halfords, the UK's largest bike accessories retailer.