Promax Direct Mount Chainring Size:41 The crank arms spin on

The crank arms spin on a beefy 30mm spindle permanently fitted into the drive-side arm

and a rigid

featuring a proprietary co-molded nylon shell and carbon fiber Seatpost

Designed to be used exclusively on carbon rims

Promax Direct Mount Chainring Size:41 The crank arms spin onMachined from high end aluminum, Promax Direct Mount chainrings are made to be lightweight yet extremely durable to handle the torque and stress of modern BMX racing and other single ring applications. Uses SRAM 3 bolt direct mount chainring to crank interface Provides a lighter set up by elimating the use of a spider while remaining strong and stiff CNC Machined from high grade 6061 T6 series aluminum for high strength while providing weight savings