Motor Size/Dimension/Reload Reference Casing lengths are measured from END of aft closure to END of forward closure. Motor Description Motor Dimensions Reloads for this Motor 29mm Motors 29/60 3.902 inches F-37W, F-62T 29/100 4.902 inches G-54W, G-104T 29/180 7.660 inches G-75J, H-128W, H-238T 29/240 9.420 inches H-97J, H-180W, H-220T 38mm Motors 38/240 6.073 inches H-73J, H-123W, H-242T 38/360 7.948 inches H-112J, I-161W, I-357T 38/480 9.823 inches I-154J, I-211W, I-300T 38/600 11.698 inches I-195J, I-284W, I-435T 38/720 13.573 inches J-350W 38/1080 19.198 inches J-570W 54mm Motors 54/852 9.489 inches J-90W, J-180T, J-275W, J-460T 54/1280 12.817 inches J-135W, J-415W, J-800T 54/1706 16.146 inches K-185W, K-550W, K1100T 54/2560 22.804 inches K-700W 75mm Motors 75/2560 15.600 inches K-560W 75/3840 20.900 inches L-850W 75/5120 26.200 inches L-1120W 75/6400 TBA inches M-1315W 98mm Motors 98/2560 11.384 inches K-458W 98/5120 17.447 inches L-952W 98/7680 23.509 inches M-1419W 98/10240 29.572 inches M-1939W 98/15360 41.698 inches N-2000W