ok i carry aprox 200kg to 250kg of tools in the rear most of the time , i was advised to go for medium load leafs in the rear, when first fitted they lifted 40mm, now after 10,000k in the car the leafs are flat and 0 lift back to standard hieght , taking the car back to see what they say , but im thinking mybe i should o gone for the 400kg constant load leafs,