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Description
72102 – Hydro-Gear 5-Bolt Hub Kit (Genuine OEM Part)
The Hydro-Gear 72102 Hub Kit (5-Bolt) is a genuine OEM drivetrain component designed to provide a secure and reliable connection between the hydrostatic transmission output shaft and the wheel assembly. This heavy-duty hub ensures efficient power transfer, proper wheel alignment, and smooth machine operation in demanding mowing conditions.
Built to Hydro-Gear’s OEM specifications, the 72102 hub kit features precision-machined components and a robust 5-bolt mounting pattern for enhanced strength and stability. It is engineered for long-term durability in both residential and commercial zero-turn mower applications.
Key Details:
Manufacturer: Hydro-Gear
Manufacturer Part Number: 72102
Part Type: Hub Kit (5-Bolt)
Function: Transfers power from transmission to wheel assembly
Bolt Pattern: 5-bolt design
Material: Heavy-duty, precision-machined steel
Installation: Direct OEM replacement kit
Compatibility:
The Hydro-Gear 72102 Hub Kit is used on select Hydro-Gear transmission systems commonly found in:
Zero-turn mowers (ZT-2800, ZT-3100, ZT-3200 series)
Commercial and residential lawn equipment with Hydro-Gear drives
Brands such as Gravely, Ariens, Scag, Exmark, and others using Hydro-Gear transmissions
(Compatibility depends on transmission model and axle configuration—verify before installation.)
Who is this for?
Ideal for landscapers, homeowners, and service technicians maintaining or repairing Hydro-Gear-driven equipment that requires a durable 5-bolt hub connection.
Property Size (Acre):
Best suited for medium to large properties where zero-turn mowers operate under continuous load.
Pros:
Genuine Hydro-Gear OEM construction
Stronger 5-bolt design for improved durability
Ensures proper wheel alignment and power transfer
Built for heavy-duty use
Direct-fit replacement for compatible systems
Cons:
Only fits specific Hydro-Gear transmission models
Installation may require mechanical tools and expertise
Not interchangeable with 4-bolt hub systems
Comparison (vs 4-bolt hub kits):
Compared to 4-bolt hub designs, the Hydro-Gear 72102 5-bolt hub provides increased strength and stability, making it better suited for heavier-duty and commercial applications. The 4-bolt version is typically used in lighter-duty setups, while the 5-bolt configuration offers enhanced durability under higher loads.
Why buy from Barry’s?
Barry’s offers genuine Hydro-Gear OEM parts with trusted fitment and performance. With expert support and reliable inventory, Barry’s ensures you get the right components to keep your equipment running efficiently and professionally.

