Hi,
I have a 2002 TF with the original front ARB which measures 20.39 diameter over tye PU coating, so I would take this as 20mm.

Ive just fitted a soft ride kit and the front springs have a yellow paint flash which appears to be an increase on the standard blue spring rate. Yellow =420lbs Blue = 375 lbs.

Rear springs incidentially are Red 600lbs as original, dampers are gas pressurised Monroe.

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