Side Effects

First introduced in 2010 on the "54", Side Effects are our axle system that allow for easily swapping out the hub to change the weight and the look of your yoyo. For models that use this system, the Side Effects are interchangeable: any set of Side Effect works on any Side Effect compatible yoyo. The compatible yoyos are listed below and they include a few from other brands that licensed our technology.

Side Effects


  • Aluminum Ultra Light: 2.5 grams
  • Aluminum Lego: 2.7 grams
  • Aluminum Markmont.: 2.8 grams
  • Aluminum Dome: 2.9 grams
  • Aluminum Sakura: 2.9 grams
  • Aluminum Spike: 3.2 grams
  • Aluminum Flat Cap: 3.3 grams
  • Aluminum Energy Domes: 3.5 grams
  • Aluminum Stunt Peg: 4.0 grams
  • Aluminum CODE1: 4.0 grams
  • Aluminum Dietz: 3.0 grams
  • Aluminum Anti-Yo: 4.7 grams
  • Aluminum Mini Disk: 4.8 grams
  • Aluminum Disk: 7.2 grams
  • Brass Ultra Light: 5.2 grams
  • Brass Lego: 5.8 grams
  • Brass MarkMont.: 6.1 grams
  • Brass Dome: 6.6 grams
  • Brass Dietz: 6.7 grams
  • Brass Spike: 7.2 grams
  • Brass Flat Cap: 7.7 grams
  • Brass Energy Domes: 8.0 grams
  • Brass CODE1: 9.5 grams
  • Nickel Plated Disk: 7.4 grams
  • RSM: 11.2 grams

Compatible YoYos


  • One Drop 54
  • One Drop CODE1
  • One Drop Dietz
  • One Drop CODE2
  • One Drop DANG
  • One Drop Cascade
  • One Drop Yelets
  • One Drop/CLYW Summit
  • One Drop/ILYY Sakura SE
  • One Drop Chik!
  • One Drop Benchmark Series 2013
  • One Drop Gradient
  • One Drop Markmont. Classic
  • One Drop Benchmark Series 2014
  • One Drop Downbeat
  • One Drop Rebirth
  • One Drop Terrarian
  • One Drop Benchmark Series 2016
  • One Drop Prescription
  • One Drop Küntosh
  • Toxic Hazmat
  • Eternal Throw Victory
  • Anti-Yo Viszilla
  • Anti-Yo YWET
  • YoYoCommunity Spectrum SE