RDM-I: Reduce Diameter- Inverted. Once you take out the mast from its mast bag, do not be thinking that something is wrong. The ferrule is part of the top, and not part of the bottom anymore. Therefore, the rdm is now being called RDM-I. After testing with our wave team, the masts, we have discovered that landing hard flat or nosedive jumps, was creating extra stress to the top, where the ferrule would enter it. By having the ferrule being part of the top, the stress is taken out and the tops do not suffer the extra stress that could bring in the worst case to breakages. We have decided to clean up our RDM-I range by offering 2 very distinctive models. The K87 and the K97. 87% carbon mast to bring a durable mast with the highest carbon % possible. A 100% carbon mast is the K97, but with extra reinforcements to give the extra durability to the normal 100%, making itself a 97% carbon mast. A new rubber cap at the joints, to clean up the inside part of the mast from dirt, while uniting the top to the base. Available sizes:  K97 | Carbon 97% | 300, 340, 370, 400, 430 K87 | Carbon 87% | 340, 370, 400, 430