Neptune Helm 25t Bolt Drive BMX Aluminum Sprocket / Chainwheel - Blue - USA Made 28.6mm (1-1/8") and steel hardware

and steel hardware

a soft rubber compound for comfort and long wear

40 tires (507mm)

Featuring K-Shield protection for puncture resistance and a reflective sidewall for better urban visibility

They also feature built-in safety wire grooves to eliminate twisting

Neptune Helm 25t Bolt Drive BMX Aluminum Sprocket / Chainwheel - Blue - USA Made 28.6mm (1-1/8") and steel hardwareThe Neptune Helm sprocket is USA made from 6061 aluminum. It has a 15 16'' 23. 8mm (24mm) bore, which can be used with most cranks with the use of the proper sprocket adapter (not included). This item has an anodized finish and laser etched logos. Size: 25tColor: Blue For 19mm adapter click HERE!