RC Gearing Guide & Rollout Calculator

RC Gearing Calculator

Use this calculator to work out your gear ratio and rollout. Lower rollout = more punch. Higher rollout = more top speed.













Quick Setup:



Results

Spur / Pinion Ratio: –
Final Drive Ratio (FDR): –
Rollout (mm): –

Enter values and calculate

Recommended Parts



Simple Gearing Guide

  • Bigger pinion = more speed, less punch
  • Bigger spur = more punch, less top speed
  • Lower rollout = stronger drive out of corners
  • Higher rollout = more top speed

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