Optitrac 123A8/B R-1W TECHNICAL DATA DesignOptitracIndustry ClassificationR-1WTyre size320/70R20LI/SS123A8/BFR/DWn/aPRn/aTL/TTTLTyre Width (mm)319Overall diameter (mm)982 Static Loaded radius (mm)n/aRolling circumference (mm)n/aSRI475Weight (kg)45Nominal Inflation Pressure (bar)2.4Maximum Load (kg)1550Tread Depth (mm)34Recom ‘d Rim WidthW10Other approved rimsW11, W9