SUM-521 Roof Bars are part of the Summit 500 Series of steel bars, for cars with factory-fitted rails. The bars have a maximum load of up to 75kg. These roof bars are specific for certain types of vehicle - it\'s important to check compatibility before you buy. Do you know which roofbars are suitable for your vehicle? Click here to use Summit\'s RoofBar Selector - just key in your vehicle details and it will tell you which bars you need (the link opens in a new tab)