Ring Gear, Flywheel Inside Diameter: 15.880Â Â Â Â Outside Diameter: 17.300Â Â Â Â Teeth: 137Â Â Â Â Width: .875 Case-IH Tractor MAGNUM 215 MAGNUM 245 MAGNUM 255 MAGNUM 275 MAGNUM 305 MAGNUM 335 1030 1200 1200TK 1470 1896 2090 2094 2096 2290 2294 2390 2394 2470 2590