COEFEPIY 4" x 4" Live Axle Hub for Go-Karts & ATVs — 1" to 3/4" Step-Down, 8" Wheel, 2-3/4" Length

COEFEPIY's 4" x 4" live axle hub is a step-down metal hub that adapts a 1" inboard shaft to a 3/4" outboard shaft, designed for go-karts, ATVs, golf trikes and small dune buggies using 8" wheels.

This precision-machined hub provides a compact, durable solution when you need to join a live axle to smaller-diameter wheel spindles. Built from premium metal with a 2-3/4" hub length and a 1/4" keyway slot, it eases installation while maintaining reliable torque transfer. Included hardware and a flat key are tailored to the hub seat, so you get a near-complete mounting kit out of the box.

What exactly are the hub's dimensions and shaft step-down specs?

The hub measures roughly 5" in outside diameter with a 2-3/4" hub length. It steps down the inboard shaft from 1" to a 3/4" outboard shaft, making it compatible with common kart and small ATV axle setups.

• Outside diameter: 5"
• Hub length: 2-3/4"
• Inboard shaft diameter: 1"
• Outboard shaft diameter: 3/4"
• Keyway: 1/4" slot for secure coupling

How does this hub attach to wheels and axles?

Mounting is straightforward: slide the hub onto the axle, align the 1/4" keyway with the included flat key, then secure the wheel with the four lug nuts. The hub's stepped bore and keyway create a positive drive connection without needing additional machining.

• Slide the hub onto the axle and fit the flat key into the keyway.
• Tighten supplied lug nuts to clamp wheels with 8" diameter rims.
• Verify shaft seating and torque to manufacturer recommendations.

Which vehicles and wheel sizes will this hub fit?

This hub is intended for small off-road and recreational vehicles that use 8" wheels and live axle configurations. It's commonly used on go-karts, compact ATVs, golf trikes, and lightweight dune buggies that require a 1" to 3/4" step-down adapter.

• Compatible wheel size: 8" wheels.
• Vehicles: go-karts, golf trikes, small ATVs, dune buggies.
• Works with live axle setups using a 1" inboard shaft.

What materials and hardware come with the hub, and how durable is it?

The hub is fabricated from premium metal to resist wear from torque and road stresses. It ships with a flat key sized for the keyway and four lug nuts for wheel attachment, giving you the essential parts for installation; regular inspection and correct torqueing extend service life.

• Material: high-quality metal construction for strength and durability.
• Included hardware: flat key for keyway and four lug nuts.
• Design: keyed step-down bore for secure torque transfer.

Who is this for: This COEFEPIY live axle hub is aimed at DIY builders, small-vehicle repair shops, and hobbyists converting or repairing go-karts, golf trikes, light ATVs, or dune buggies that use 8" wheels and require a 1" to 3/4" shaft adapter. Installers who want a ready-to-fit hub with included key and lug nuts will appreciate the straightforward fitment; users should confirm shaft tolerances and wheel specifications before purchase.