Rennen takes their commitment to advancing BMX racing technology seriously and with the Rennen Threaded Chainring-4-Bolt at J&R Bicycles this is obvious. They have machined internal threads into the gears of this sprocket which eliminates the need for a chainring nut wrench and allows for more accuracy. Made from super strong 3/16in thick 7075-T6 aluminum it can handle all kinds of conditions and weighing less than most other options on the market. This is the popular chainring option for top Pro BMX racers around the world.
