5.20 Richmond Gear 9.5" ring gear diameter, 32 spline pinion, 9310 material. Are used in MWE 57022 Pro Stock Low Friction Thirdmembers. The ring and pinions can be used in a Thirdmembers that has 28 or 35 pinion, by changing to a 57675 Pinon Support and using a 39936 aluminum yoke or a 40060 coupler. These gear sets offer larger input 32 spline size for increased strength over the smaller 28 spline pinion.