Neptune BMX Helm Sprocket Colour_Hard Anodised Black still made in Japan from

still made in Japan from 4130 cro-mo tubing and great for all old school BMX restorations like GT

knurled for improved traction

U or V brake

2mm for mountain/road/BMX race bikes

Color matched anodized Volcano cones and aluminum cone spacers with hardened CrMo knurls to bite into dropouts

Neptune BMX Helm Sprocket Colour_Hard Anodised Black still made in Japan fromUSA Made Neptune BMX cross style sprocket influenced by the original Redline Flight Crank sprockets of the early 80's. We have used these on quite a few builds and they look GREAT. Perfect for your old school BMX resto. Now available in small sizes that you could use on a Cruiser. Example gearing: 20": 44 16 or 42 15 24": 41 18 or 39 17 19mm centre bore for 19mm 3 piece cranks only. A machine shop may bore out the hole larger for yourself however we