jtfrkope Go-Kart Live Axle Hub Kit — 1" to 3/4" Step-Down with 1/4" Key, 8" Wheel Ready (2pcs)

The jtfrkope 4" x 4" live axle hub kit is a two-piece, heavy-duty axle hub assembly that adapts a 1" inboard shaft to a 3/4" outboard step-down with a 1/4" keyed slot, supplied with keys and lug nuts for 8" go-kart wheels.

This hub kit is built for small off-road vehicles and recreational go-karts needing a reliable way to mount 8" wheels on live axles. Made from durable metal, the hubs are machined for a snug keyed fit and include hardware to get you from parts to wheels quickly. The design centers on compatibility with common kiddie and adult-size go-kart motors and provides the geometric step-down needed where axle OD differs from wheel hub bore.

How does this hub kit handle different shaft sizes?

The jtfrkope hub adapts between a 1" inboard shaft and a 3/4" outboard wheel bore using a stepped body and a 1/4" keyway for positive torque transfer. This configuration prevents slippage while keeping alignment consistent along the live axle.

• Inboard diameter: 1" for main axle compatibility.
• Outboard diameter: 3/4" to fit smaller wheel bores.
• 1/4" keyed slot included to lock hub to shaft and resist rotation.
• M12×1.2 lug nuts included for secure wheel fastening.

What comes in the package and what are the specs?

The kit contains two axle hubs, two dedicated flat keys, and eight lug nuts—everything required to mount a pair of rear or front wheels. Hubs measure approximately 4" x 4" with a hub length of 2-3/4", and the overall diameter and hardware sizes are tailored for 8" wheel applications.

• Pack contents: 2 hubs, 2 flat keys, 8 lug nuts.
• Hub length: 2-3/4" for correct wheel spacing.
• Overall diameter listed as about 5" to suit wheel center designs.
• Intended wheel size: 8" (rear or front use on go-karts and buggies).

How durable and easy to install is this hub assembly?

Constructed from premium metal materials and precision-machined, the hubs are corrosion-resistant and built to take routine recreational loads. Installation is straightforward for anyone familiar with basic axle and wheel mounting—slide the hub onto the shaft, insert the key, and torque the lug nuts to spec.

• Material: high-strength metal for wear resistance and longevity.
• Installation: slide-on fit with keyed locking and standard lug torque.
• Tools required: socket set and torque wrench (not included).
• Maintenance: check lug torque and key seating periodically.

Which vehicles and situations is this hub best suited for?

This hub kit is intended for small recreational vehicles where a live axle needs adaptation to an 8" wheel—common in hobbyist go-karts, minibuggies, and light-duty DIY off-road builds. It’s ideal when the axle and wheel bores differ in diameter and a keyed connection is preferred for reliability.

• Designed for go-karts, dune buggies, and light off-road custom builds.
• Works well for replacing worn hubs or upgrading mismatched axle/wheel setups.
• Best for non-high-speed recreational use rather than heavy industrial loads.
• Sold as a two-piece set for rear-axle or paired-wheel installations.

Who this is for: hobbyists, kart builders, small-vehicle mechanics, and DIYers who need a rugged, keyed live-axle hub that adapts a 1" shaft to a 3/4" wheel bore for 8" wheels. If you’re assembling or repairing a recreational go-kart or custom minibuggy and want a straightforward, hardware-complete solution, this jtfrkope kit supplies the hubs, keys, and lug nuts to finish the job.