4" x 4" Go-Kart Live Axle Hub with 1" to 3/4" Step-Down

The 4" x 4" go-kart axle hub is most commonly found on go-karts using 8" wheels. The hub features four lug nuts and are 1-1/16" long. The inner bore is milled for a 1/4" axle key. The most common style for go-karts features a 1" inner (or inboard) shaft diameter with the axle turned down to a 3/4" outer diameter.

Note: Although this 1" step-down to 3/4" axle shaft design is common to many go-kart brands and models, it is incompatible with Yerf-dog 'karts.

⚠ WARNING California Residents: Proposition 65 Warning

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