4 Bar Linkage Calculator v3.0 - Suzuki Samurai Rear 4-Link Geometry Setup

This document is a screenshot of a spreadsheet-based "4 Bar Linkage Calculator v3.0" used to model rear suspension link geometry. It records vehicle specifications: 107.0 in wheelbase, 37.00 in tire diameter, 18.50 in tire rolling radius, 34.00 in vehicle CG height, 2,500 lb vehicle mass, and 750 lb front and rear unsprung mass. Suspension geometry inputs list upper link coordinates (frame end x=34.00, y=14.00, z=32.00 in; axle end x=2.00, y=4.00, z=29.00 in) and lower link coordinates (frame end x=42.00, y=4.00, z=22.00 in; axle end x=4.00, y=20.00, z=18.00 in). The geometry summary reports 32% static anti-squat, a 27 in roll center height, a -4 degree roll axis angle (roll understeer), and an instant center at 976 in (X-axis) and 120 in (Z-axis). Travel results show 32% travel anti-squat, 26.97 travel roll center, -4.41° travel roll axis, 0.00° pinion change, 0.00 travel amount, and a 1.00 travel increment, with Bump and Droop controls. Two plots visualize the linkage: a main side-view diagram showing lower links, upper links, anti-squat line, anti-squat CG, 100% AS line, roll axis, roll center, and instant center, plus an inset travel plot. A reader can learn the modeled 4-link geometry values and resulting anti-squat/roll-axis characteristics for this build.