RNC Titanium Ceramic Mid Bottom Bracket Bearings 19mm, 22mm & 24mm TNB RHD/LHD drive compatible

RHD/LHD drive compatible

Box section walls are continuous with no cut-outs to maintain strength around the entire rim

Big freshen up for the Killabee K4

Fits most modern 20" Freestyle BMX bikes

RNC Titanium Ceramic Mid Bottom Bracket Bearings 19mm, 22mm & 24mm TNB RHD/LHD drive compatibleThe lightest & strongest bottom bracket bearings ever made for BMX! The Bearing races are CNC machined from heat treated & aged 6al 4v w a tensile strength of 170,00 psi then electroless nickel silicon carbide plated. The electroless nickel creates a layer of 70 Rockwell plating w the silicon carbide nano particles being a 9. 5 on the mohs scale; nearly as hard as diamond for a long lasting bearing life. The balls are Silicon nitride Si3n4. These are