Gearbox Cylinder-to-Barrel Volume Ratio Calculator

WeeStu.tech Tech Diagnostic Tool

Cylinder Type / Porting

Inner Barrel Length (mm)

Inner Barrel Bore Diameter (mm)

2.18 : 1

Volumetric Ratio

0.28g – 0.32g

Optimal BB Mass

OPTIMAL: Balanced for standard & mid-weight BBs (2.0:1 – 2.3:1)