Trojan Disc-Braked Early Model Hub – 225mm, 5x4-1/4" PCD, 7/16" Studs (T225HT001) is a purpose-built replacement hub engineered by Trojan NZ for older disc-brake trailer systems. Designed for durability and precise fitment, this hub delivers reliable braking performance in real-world conditions—from coastal NZ roads to farm tracks and everyday trailer use. It’s an ideal upgrade for lightweight boat trailers, domestic trailers, and utility setups that rely on dependable disc braking.

Key specifications

• Diameter: 225mm
• Stud pattern: 5 x 4-1/4" PCD
• Stud size: 7/16"
• Construction: Heavy‑duty steel hub with a corrosion‑resistant coating
• Model / Part: T225HT001
• Finish: Corrosion‑resistant coating designed for marine and inland environments

Bearing & seal components

This hub is aligned with robust bearing and seal standards to ensure smooth rotation, consistent braking response, and extended service life in challenging conditions. Key parts include:

• Bearing kit: Part # TPT1184
• Seal kit: Part # TPT10131
• Seal dimensions (selected components):
• Cup LM67010 – 58mm "OD" inner; 59mm "OD" cone
• Cone LM67048 – 32mm "ID"
• Cup LM11910 – 45mm "OD" outer; 37mm "ID"
• Cone LM11949 – 19mm "ID"

Why this hub stands out

Unlike generic replacements, the Trojan Disc-Braked Early Model Hub is purpose-built for older Trojan disc-brake systems. Its 225mm rotor compatibility, exact 5x4-1/4" PCD, and 7/16" studs ensure precise alignment and reliable braking force when you’re restoring or maintaining vintage trailers. The heavy‑duty steel construction and corrosion‑resistant finish stand up to New Zealand’s salt air, muddy tracks, and seasonal road use, helping reduce maintenance downtime and extend the life of bearings and brake components.

Who this is for

• Trailer owners restoring or maintaining older Trojan disc-brake systems
• Boat trailer operators who need a dependable, marine-ready hub
• General domestic and light commercial trailers requiring a precise, durable disc-brake hub
• Technicians and hobbyists performing replacements on 225mm Trojan hubs with 5x4-1/4" PCD and 7/16" studs

Use cases and practical insights

• Ideal for light boat trailers that spend time in coastal environments where corrosion resistance matters
• Suitable for restorations of older trailers that require proper PCD alignment and stud compatibility
• Recommended when upgrading or replacing worn early-model Trojan hubs to restore reliable braking performance

Installation and care tips

• Verify compatibility: confirm you have a 225mm disc, 5x4-1/4" PCD, and 7/16" studs before installation
• Pair with the listed bearing and seal kits (TPT1184 and TPT10131) for optimal performance
• Inspect bearings and seals during routine maintenance, and replace components using Trojan-approved kits to maintain braking reliability
• Store and operate in environments where the corrosion-resistant finish can protect against salt spray and moisture

Dimensions, compatibility, and kit details are tuned for reliability and longevity in real-world trailer use. If you’re maintaining or reviving an older Trojan disc-brake setup, this hub provides a precise fit and confident stopping power, backed by Trojan NZ’s trusted build standards.

Hub Spares Details (Catalogue Link) Page 99