GREHUA 3/4" Bore Sprocket Hub for Go Karts & Drift Trikes — 3/16" Keyway, Steel with Hardware Kit

GREHUA's heavy-duty 3/4" bore sprocket hub with a 3/16" keyway and full hardware kit is a direct replacement for rear axle sprocket or brake-drum mounting on go karts, drift trikes, mini bikes, ATVs and dune buggies.

If you need a dependable hub to secure a sprocket or brake drum to a 3/4" round axle, this GREHUA assembly provides a solid steel body, a keyed fit for torque transfer, and the bolts and wrench required for installation. The unit is intended for 4" and 4-1/2" brake drums and common rear-axle sprockets, offering a straightforward swap when a worn or damaged hub needs replacement.

Will this hub fit my axle and sprocket?

It fits a standard 3/4" diameter round axle and uses a 3/16" keyway to lock the hub to the shaft, matching many small-vehicle drivetrains. Confirm the existing axle diameter and key size before ordering to ensure compatibility.

• Designed for 3/4" (0.75") round axle rods
• 3/16" keyway for mechanical drive engagement
• Compatible with 4" and 4.5" brake drums and typical rear sprockets
• Check measurements against your existing hub and sprocket bolt pattern

How durable and precise is the GREHUA hub?

The hub is manufactured from hardened steel for strength and balanced for smoother rotation, helping reduce wobble and premature wear. Its construction is intended for light off-road and recreational use, where impact resistance and consistent alignment matter.

• High-strength steel body resists bending under load
• Balanced design minimizes vibration at speed
• Corrosion-resistant finish for longer service life
• Quality machining ensures snug keyway and fastener seating

What comes in the hardware kit and how do I install it?

The package arrives with the hub, a matching key, four bolts, four nuts and a small wrench, giving you everything needed to mount most sprockets or brake drums. Installation is a basic mechanical task: align the keyway, slide on the sprocket/drum, secure bolts, insert the key into the shaft and tighten the set screws to lock the assembly.

• Includes hub, key, 4 bolts, 4 nuts and a wrench
• Align keyway in hub and axle, then slide sprocket or drum into place
• Tighten fasteners evenly to prevent misalignment
• Use supplied wrench and verify set-screws are secure before use

Can I use this on my drift trike, mini bike or ATV?

Yes—this hub is suitable for a range of small recreational vehicles that use a 3/4" axle and 3/16" keyway, including drift trikes, mini bikes, go karts and light ATVs. Always double-check the brake drum or sprocket dimensions and bolt pattern for fitment.

• Commonly used on go karts, drift trikes, mini bikes and dune buggies
• Works with rear-axle sprockets and small brake drums
• Not intended for heavy industrial or high-horsepower vehicles
• Contact support with vehicle specs for fitment confirmation

Who is this for: The GREHUA 3/4" sprocket hub is aimed at DIY mechanics, small-vehicle enthusiasts and repair shops replacing worn axle hubs on recreational vehicles. If you maintain go karts, drift trikes, mini bikes, or light ATVs and need a rugged, keyed hub with the mounting hardware included, this part simplifies installation and restores secure sprocket or brake-drum attachment.