HD⚡Switch did the Engineering to Develop This Conversion Kit To Eliminate Axle Wear and Eliminate the Need for Grease. We Use The Best Quality Components, All Built to our Engineering Specifications. Includes a Complete Steering Spindle Rebuild Kit with our Bushing to Bearing Conversion Kit and All Required Wheel Hardware. Caster Bushing Rebuilt Kits are also available (Part number 21546750) Fits Ariens Lawn & Garden Tractor Models: 936001 960460031-00, 936007 960460032-00, 936007 960460032-01, 936037 960460001-00, 936038 960460002-00, 936039 960460003-00, 936039 960460003-01, 936041 960460005-00, 936042 960460011-00, 936045 960460016-00, 936048 960460010-00, 936048 960460010-01, 936049 960460015-00, 936051 960460024-00, 936051 960460024-01, 936051 960460024-02, 936052 960460025-00, 936052 960460025-02, 936053 960460026-00 Fits Ariens Lawn & Garden Tractor Models: 936053 960460026-01, 936053 960460026-02, 936053 960460026-03, 936053 960460026-04, 936053 960460026-05, 936056 960460023-00, 936056 960460023-01, 936056 960460023-02, 936056 960460023-03, 936057 960460029-00, 936063 960460033-00, 936063 960460033-01, 936073 960460054-00, 936073 960460054-01, 936073 960460054-02, 936074 960460055-00, 936074 960460055-01 Fits Ariens Lawn & Garden Tractor Models: 936075 960460056-00, 936075 960460056-01, 936076 960460058-00, 936076 960460058-01, 936077 960460059-00, 936083 960460061-00, 936083 960460061-01, 936083 960460061-02, 936084 960460062-00, 936084 960460062-01, 936085 960460063-00, 936085 960460063-01, 936086 960460064-00, 936087 960460065-00, 936089 960480089-00, 936093 960460067-00, 936094 960460068-00 HD⚡SWITCH Welded Steering Axle Spindle Kit with Bushing to Bearing Conversion Kit. Our bushing to bearing conversion kit eliminates axle wear and does not require grease. Our kit is engineered to replace bushings with smooth high quality precision bearings with Tough steel trash seals. One kit will convert both wheels and includes all required hardware.