Browsing Mountain Chainrings from BOX

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BOX Cosine Chainring
Margin Booster
  • CNC machined 6061-T6 aluminum with rounded tooth profile to reduce chain wear
  • 3rd party web sales must be an Authorized Dealer
 
item # ring type mount teeth oval/round color in stock?
  BX5838 single 4x104mm 38 round black YES
  BX5840 single 4x104mm 40 round black YES