Promax 4-Bolt Chainring - 42t 104 BCD Black MFPN=ST21-0BA88S48-BK S2 steel bits included: 2

S2 steel bits included: 2 2

An EVA midsole provides lightweight cushioning and the canvas upper is durable and flexible

The innovative design of the outer chainring ensures faster quieter shifts thanks to the contoured pin and the symmetrical design of the inner chainring teeth provide improved stability with chain crossovers

T-Handle shape for high and low torque functions

Clean with Super Bike Wash remove grit grime and old lubricant with Multi Bike Degreaser and keep the chain moving with DRY Lube

Promax 4-Bolt Chainring - 42t 104 BCD Black MFPN=ST21-0BA88S48-BK S2 steel bits included: 2Promax 4 Bolt Chainring 42t 104 BCD Black. Machined 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 TECH SPECS Color Black Ring