Check the listing for details. 4 Lug 1" Live Axle Adapter Hub for Go Kart Cart ATV Quad Trailer - 4" x 4". Condition: New. Listed at 19.95 USD. The 4" x 4" go-kart axle hub is most commonly found on go-karts using 8 inch rear or front wheels. Although these hubs are incompatible with Yerf-Dog 'karts, these are compatible with many quad, ATV, cart, golf, and trike wheels that use this same hub. The hub assembly features a kit of four lug nuts, and the hubs are 2-3/4" long. The inner bore is milled for a 1/4" axle key.The most common style for gokarts features a 1" inner (or inboard) shaft diameter with the axle turned down to a 3/4" outer diameter.Please note that our AlveyTech 4" x 4" Go-Kart Live Axle Hubs with 1" to 3/4" Step-Down are sold as singles. To complete your project, you may need to buy more than one.Specs are going to be important when selecting a new hub. Please refer to our following specs to see if this will be the right hub for your project. Specifications Diameter: 5" (125 mm) Length: 2-3/4" Keyway & key size: 1/4" (6.5 mm) Inboard axle bore diameter: 1" Outboard axle bore diameter: 3/4" Mounting lugs (across): 4" Mounting lugs (side by side): 2-7/8" Lug length: 1-1/16" Lug thread: 1/2x20 On Jul 11, 2024 at 18:58:04 PDT, seller added the following information:The 4" x 4" go-kart axle hub is most commonly found on go-karts using 8 inch rear or front wheels. Although these hubs are incompatible with Yerf-Dog 'karts, these are compatible with many quad, ATV, cart, golf, and trike wheels that use this same hub. The hub assembly features a kit of four lug nuts, and the hubs are 2-3/4" long. The inner bore is milled for a 1/4" axle key.The most common style for gokarts features a 1" inner (or inboard) shaft diameter with the axle turned down to a 3/4" outer diameter.Please note that our AlveyTech 4" x 4" Go-Kart Live Axle Hubs with 1" to 3/4" Step-Down are sold as singles. To complete your project, you may need to buy more than one.Specs are going to be important when selecting a new hub. Please refer to our following specs to see if this will be the right hub for your project. Specifications Diameter: 5" (125 mm) Length: 2-3/4" Keyway & key size: 1/4" (6.5 mm) Inboard axle bore diameter: 1" Outboard axle bore diameter: 3/4" Mounting lugs (across): 4" Mounting lugs (side by side): 2-7/8" Lug length: 1-1/16" Lug thread: 1/2x20 On Jul 11, 2024 at 18:58:04 PDT, seller added the following information: