Rennen Threaded Chainring-4-Bolt 104 BCD chainring-bolts - 3pc design with 19mm

- 3pc design with 19mm 8 spline or 48 splines heat-treated chromoly spindle

Junior and smaller sized frames make use of Redline's R6 formed tubing with a euro bottom bracket and 3D-type dropouts

*New Era 59-Fifty

Material: CNC machined 6061-T Aluminum

Rennen Threaded Chainring-4-Bolt 104 BCD chainring-bolts - 3pc design with 19mmRennen 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.