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Gear Ratio Calculator

Dial in your pinion and spur in seconds — free, with rollout and FDR.

Calculate

Shop springs at AMain

Buggy, truck, on-road springs — every rate, every color.

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RC Setup App icon

Free to start · iOS & Android

Setup App & Race Log

Your 3Racing Sakura D5S is in the RC Setup App

Save every setup change you make to your 3Racing Sakura D5S, get AI tuning answers for that exact car, and log your races — at the track or back in the pits.

  • Setup Tracking
  • AI Mechanic answers
  • Find & Share Setups
  • Race Log
  • Gear Ratio Calculator
  • Free to use
Download on the App StoreGet it on Google Play
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