FANBELTS by SIZE All popular belts are latest Raw Edge Cog automotive belts Width Outside Circumference Part Number mm Inches mm Inches 10mm 13/32" (.406") 915 36" B6833 1105 43.5" B3756 1155 45.47" B3758 1170 46" B9333 1205 47.44" B7149 1310 51.6" B7150 1345 53" B7091 12mm 15/32" (.469") 1371 54" B393 13mm 17/32" (.535") 775 30.5" B1370 800 31.5" B3750 1040 41" B2180 1065 42" B850 1130 44.5" B1369 1155 45.47" B3762 1170 46" B7092 1195 47" B2182 1230 48.5" B390 1245 49" B2175 1270 50" B2183 1295 51" B2987 1320 52" B3761 1370 54" B3763 1400 55 B2986 1425 56" B5198 1450 57" B1368 1475 58" B846 1500 59" B391 1550 61" B3753 1585 62.4" B1026 1600 63" B847 1675 66" B851 17.5mm 11/16" (.6875") 831 32.7" B3749 1194 47" B835 1232 48.5" B836 1346 53" B837 1422 56" B838 1460 57.5" B839