Park Tool Chainring Diameter Gauge | Trek Bikes (CA)
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Park Tool Chainring Diameter Gauge

$46.99 Model 22905
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Product details

  1. Measure bolt circle diameter for a wide variety of four and five bolt chainrings
  2. Made of anodized aluminum and permanently laser engraved
  3. The tool centers itself in chainring holes, chainring bolts, or crank arm holes
  4. Includes a center-to-center distance scale and a handy reference chart 

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