JDMSPEED 44mm & 40mm Wheel Bearing Greaser Kit for Polaris Ranger RZR Sportsman — Aluminum adapters, sealed O‑rings

JDMSPEED 44/40MM front and rear wheel bearing greaser tools are aluminum adapters that let you pump grease directly into 44mm and 40mm Polaris-style wheel bearings without removing the hub.

Keep your ATV or UTV wheel bearings lubricated faster and with less disassembly using this pair of greaser adapters. Machined from aluminum with steel fittings, double O-ring seals and included nozzles and sealed rubber rings, these tools are tailored to fit common Polaris and many aftermarket bearings. They are sold as a kit with both 44mm and 40mm sizes so you can service front and rear bearings on a wide range of Polaris Ranger, RZR and Sportsman models.

Will these adapters fit my Polaris wheel bearings?

These greaser tools are designed specifically for bearings that accept 44mm or 40mm internal-diameter adapters — a common size on many Polaris ATVs and UTVs. They work with both OEM and aftermarket bearings as long as the bearing inner dimension matches.

• Compatible models include many Polaris Ranger, Sportsman, RZR, Scrambler and Ranger Crew variants.
• Includes both 44mm and 40mm adapters to cover front and rear bearings.
• Check your bearing inner diameter before purchase to confirm fit.

How do these greaser tools make bearing service faster?

The adapters let you inject grease straight into the bearing through the hub without removing the hub or carrier assembly, saving time and reducing labor. A sealed rubber ring plus a double O-ring system keeps the pressurized grease from escaping so more lubricant reaches the bearing races.

• Attach to a grease gun via the steel fitting and pump grease directly into the bearing.
• Sealed rubber rings and double O-rings retain pressure and prevent leaks.
• No need to disassemble the hub for routine greasing.

What materials and parts are included in the kit?

The greaser tools are CNC-machined from durable aluminum with a steel grease fitting for secure connection. The kit contains both size adapters, multiple sealed rubber rings and extra nozzles so you have the parts needed for several servicing sessions and can replace wear parts later.

• 1x 44mm aluminum wheel bearing greaser adapter.
• 1x 40mm aluminum adapter, 8x sealed rubber rings and 4x nozzles included.
• Steel grease fitting and well-machined sealing surfaces for reliable use.

Are these safe to use with aftermarket bearings and common grease guns?

Yes — the adapters are compatible with both OEM and most aftermarket bearings that accept 40mm or 44mm inside diameters, and they use a standard grease fitting that works with typical grease guns. Proper sealing and fit ensure grease reaches the bearing without contaminant ingress when used correctly.

• Works with standard grease guns and fittings for easy connection.
• Double O-ring and sealed rings reduce contamination risk during greasing.
• Follow vehicle service recommendations for grease type and quantity.

Who is this for: These greaser adapters are designed for ATV and UTV owners, mechanics and fleet operators who service Polaris Ranger, RZR and Sportsman models or any vehicle with 40mm/44mm bearing inner diameters. If you want to reduce labor time, avoid hub disassembly for routine lubrication, and maintain bearings with better sealing during service, this kit is a practical addition to your toolbox.