36c

  1. Formula390

    520 16T Fronts

    To add to the mix, I'm now also producing a Chromoly 4140 Hardened Rockwell 36C front sprocket for the stock 520 chain. These sprockets are hard clear through, not case hardened as most front sprockets are. This means it'll last a LOT longer. Going up to a 16T front is basically about the same...
    • Formula390
    • Thread
    • 16t 36c center chain chromoly configurations dropping formula390 front gear hard hardened lengths link machining means produced ratio ratios sprocket sprockets steel stock usa vertical
    • Replies: 3
    • Forum: Formula390
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