Fraud Blocker Grind Plates/Blocks: Best Deals Online! - Skater HQ
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Grind Blocks/Trucks

How to check which size grind block you need:
  1. Turn your skates upside down, remove the top nut, the washer and the top bushing with the hanger along with the bottom bushing and the washer.
  2. Repeat on both sides until just your kingpins are sticking up.
  3. Measure the inner distance between the base of each kingpin.
This gives you the max size of disco block needed for your skates; ie 72mm kingpin distance = 75mm grind block.