Primo balance 7005 bmx rimthe rim features the same previous versions but it is constructed from the light weight 7005 aluminium which is stronger the balance rims have double walled i beam internal construction and is drilled out between the spoke holes to save weight features 7005 aluminium double walled rims size 36h double walled welded seam offset spoke holes internally machined holes weight 15 4ozbuyprimo wheels tyresfrom chain reaction cycles the worlds largest online bik