Promax RMV Rim 20 x 1.75 (Tubeless compatible - 406mm)(rear)The Promax RMV BMX rim is tubeless ready that is focused on reducing weight while building it for strength and speed. Manufactured with a thicker inner rim wall, these hoops have a sleeved joint to allow a tighter and stronger built wheel. Nothing fancy, these are a tried and tested simple design (wheels have been round for a while), they are made from 6061 T6 aluminium alloy. Certified tubeless, you can run either tubeless, or be a norm and run a