Promax 4-Bolt Chainring - 45t, 104 BCD, Black Racks 177390-Q0-L

177390-Q0-L

Manufacturer Part Number: 398-00-911

134816-Q0-L

- Holds air 4 times longer than a standard tube

- Height-adjustable traction pins feature 42 placement options per pedal

Promax 4-Bolt Chainring - 45t, 104 BCD, Black Racks 177390-Q0-LMachined from high end aluminum, Promax 4 bolt 104 BCD chainrings are designed to handle the torque and stress of modern BMX racing and are fully capable in other single speed applications. CNC Machined from high grade 6061 T6 series aluminum for high strength while providing weight savings Designed to be used with most cranksets and spiders that utilize a 4 bolt 104 BCD chainring Product Specifics Color: Black Ring Position Type: Single Tooth Count: