Is there a heavier rate spring option for the ICON Toyota Tundra 3.0 Series coilovers ?
No. Due to the very specific specs of the spring on the ICON 3.0 Series coilover, a heavier coil option is not available. The wire in the spring is special order and a heavier coil spring will actually yield less travel than the current production spring. There is not an aftermarket option available that will not limit travel.