18 SAE Flywheel Size DA DT Through Holes Suggested Coupling Sizes for SAE Flywheel Sizes No NOM Ø HTR Model 3 & 3S Hytrel® Model 3 Hytrel® Model 4 Zytel® Model 3 6 - 1/2 215.9 200.02 6 9 8, 16 8, 16 N/A 8, 16 7 - 1/2 241.3 222.25 8 9 8, 16 8, 16 N/A 8, 16 8 263.52 244.47 6 11 16, 25 16, 30 30 16, 25, 30 10 314.32 295.27 8 11 25, 30 30, 50 30 25, 30 50, 90 140 11 - 1/2 352.42 333.37 8 11 30, 50 50, 140 50 30 90, 140 250 110 250 140 14 466.72 438.15 8 13 90, 140 140 N/A N/A 250 250 16 517.5 488.95 8 13 250 250 N/A N/A SAE J620 Flywheel Dimensions for Model 3, 3S and 4 TORSIONAL COUPLINGS LF TORSIONAL FLYWHEEL COUPLINGS #DriveLineHarmony www.jbj.co.uk/torsional-couplings.html
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