11-1/2" Hydraulic Disc Brake Rotor Hub · UFP DB-35 Trailer Brake System
UFP Trailer Parts 44266U DB-35 11-1/2" Zinc-Plated Vented Disc Brake Rotor Hub · 6 on 5.5" · 6,000 lb Axles
UFP DB-35 11-1/2" zinc-plated vented disc brake rotor hub for trailer axles with up to a 6,000 lb capacity. This is the 11-1/2" rotor diameter version with a 6 on 5.5" bolt circle, 2.44" dust cap size, and 25580 / 15123 tapered bearing setup.
Part Number: 44266U 11-1/2" Rotor Diameter DB-35 · Up to 6,000 lb Axle 15"–16" Wheels · 6 on 5.5"
Overview
The UFP Trailer Parts 44266U is a DB-35 11-1/2" zinc-plated vented disc brake rotor hub designed for hydraulic disc brake trailer applications with axles rated up to 6,000 lb. This listing is for the 11-1/2" rotor diameter configuration, not a generic 12" rotor listing. It uses a 6 on 5.5" bolt circle, accepts 15" to 16" wheels, and is built around a tapered spindle bearing combination of 1-3/4" inner bearing 25580 and 1-1/4" outer bearing 15123. Inner and outer races are included; lug nuts, bearings, seal, dust cap, and installation hardware are sold separately unless specifically included with your order.
R&P Service Insight
This rotor hub should be matched by the full spec stack, not by axle rating alone. Confirm the 11-1/2" rotor diameter, DB-35 brake system, 6 on 5.5" bolt circle, spindle size, seal size, and dust cap size before ordering.
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Diameter Clarity: This listing is written around the verified 11-1/2" rotor diameter.
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Brake System Match: Designed for UFP DB-35 hydraulic disc brake applications.
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Service Parts: Bearings, seal, lug nuts, dust cap, grease, and related hardware are sold separately unless otherwise stated.
R&P Knowledge Hub
Compatibility: Designed for UFP DB-35 hydraulic disc brake systems using an 11-1/2" rotor diameter, 6 on 5.5" bolt circle, and tapered 25580 / 15123 bearing setup.
Vehicle / System Fit: Used on compatible trailer hydraulic disc brake applications with axles rated up to 6,000 lb and 15" to 16" wheels.
Installation Notes: Requires inner bearing 25580, outer bearing 15123, and seal size 3.38" x 2.13". The included races are inner race 25520 and outer race 15245.
Performance Insight: The vented 11-1/2" rotor design helps shed heat during braking, while the zinc-plated finish provides corrosion resistance for trailer service environments.
Brand & Fitment Note
Selling Brand: UFP Trailer Parts
Manufacturer Part Number: 44266U
Rotor Diameter: 11-1/2"
Application Reference: UFP, Dexter, DB-35, and related brake system names in this listing describe compatibility, fitment target, or application style where supported by verified dimensions, spindle size, and configuration details.
What This Means: This listing is for a UFP Trailer Parts 44266U DB-35 11-1/2" zinc-plated vented disc brake rotor hub for compatible hydraulic disc brake trailer applications.
Before Ordering: Verify the 11-1/2" rotor diameter, 6 on 5.5" bolt circle, axle rating, wheel size, spindle bearing journals, bearing numbers, race numbers, seal size, dust cap size, and brake system style before installation.
R&P Repair Insight
Replacing a rotor hub is often necessary when the rotor is worn, heat checked, grooved, corroded, cracked, or below the listed minimum thickness. For this part, verify the 11-1/2" rotor diameter before matching it to your DB-35 brake setup.
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Diameter Check: Match this part to an 11-1/2" DB-35 rotor hub application.
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Minimum Thickness Check: Do not continue using the rotor if it is below the listed 17 mm minimum thickness.
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Spindle Check: Match the tapered spindle setup: 1-3/4" inner bearing journal for 25580 and 1-1/4" outer bearing journal for 15123.
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Seal & Cap Check: Confirm the 3.38" x 2.13" seal requirement and 2.44" dust cap size before ordering related service parts.
Features
11-1/2" Rotor Diameter
Clearly identified as the 11-1/2" DB-35 rotor hub configuration for applications that match this diameter.
DB-35 Hydraulic Disc Brake Fit
Built for compatible UFP DB-35 hydraulic disc brake trailer applications with axles rated up to 6,000 lb.
Vented Rotor Design
Vented disc brake rotor construction helps shed heat during braking service.
Zinc-Plated Finish
Zinc-plated finish helps provide corrosion resistance for trailer use and road-exposed brake components.
6 on 5.5" Bolt Circle
Configured for trailer wheels using the 6 on 5.5" bolt pattern and designed to accept 15" to 16" wheels when application clearance matches.
Included Bearing Races
Includes inner race 25520 and outer race 15245. Bearings and seal are required separately.
Tapered Spindle Bearing Setup
Uses 1-3/4" inner bearing 25580 and 1-1/4" outer bearing 15123 for the matching tapered spindle application.
17 mm Minimum Thickness
Minimum rotor thickness is listed at 17 mm; replace the rotor if wear brings it below the service limit.
Specifications
| Specification | Detail |
| Brand | UFP Trailer Parts |
| Manufacturer Part Number | 44266U |
| Product Type | 11-1/2" zinc-plated vented disc brake rotor hub |
| Brake System | UFP DB-35 hydraulic disc brake system |
| Axle Capacity | For trailer axles up to 6,000 lb capacity |
| Rotor Diameter | 11-1/2" |
| Rotor Style | Vented |
| Bolt Circle | 6 on 5-1/2" |
| Wheel Size | Accepts 15" to 16" wheels |
| Finish | Zinc-plated |
| Spindle Size | 1-3/4" x 1-1/4" tapered |
| Inner Bearing | 1-3/4" ID · 25580 · sold separately |
| Inner Race | 25520 · included |
| Outer Bearing | 1-1/4" ID · 15123 · sold separately |
| Outer Race | 15245 · included |
| Dust Cap Size | 2.44" |
| Seal Size | 3.38" x 2.13" · sold separately |
| Minimum Thickness | 17 mm |
| Sold Separately | Lug nuts, bearings, seal, dust cap, grease, and installation hardware unless specifically included with your order |
Fitment / Application
| Category | Details |
| Vehicle / System | Trailer hydraulic disc brake system |
| Primary Fit | UFP DB-35 disc brake applications requiring an 11-1/2" rotor hub |
| Rotor Diameter Match | 11-1/2" diameter must match your existing DB-35 rotor hub application |
| Axle Rating | Compatible applications with trailer axles up to 6,000 lb capacity |
| Wheel Fit | 15" to 16" trailer wheels with 6 on 5.5" bolt circle and proper brake clearance |
| Spindle / Bearing Match | 1-3/4" inner bearing 25580 and 1-1/4" outer bearing 15123 tapered spindle setup |
| Notes | Verify DB-35 brake system compatibility, 11-1/2" rotor diameter, 6 on 5.5" bolt circle, 2.44" dust cap size, 3.38" x 2.13" seal size, and 17 mm minimum rotor thickness before installation. |
Included Components
| Quantity | Item |
| Included | UFP Trailer Parts 44266U DB-35 11-1/2" zinc-plated vented disc brake rotor hub |
| Included | Inner bearing race 25520 |
| Included | Outer bearing race 15245 |
| Sold separately | Inner bearing 25580 |
| Sold separately | Outer bearing 15123 |
| Sold separately | Seal 3.38" x 2.13" |
| Sold separately | Lug nuts, dust cap, grease, and installation hardware |
Rotor diameter clarity: This listing identifies the UFP Trailer Parts 44266U as an 11-1/2" DB-35 rotor hub. Verify the 11-1/2" rotor diameter, DB-35 brake system, axle rating, wheel size, bolt circle, spindle size, bearing numbers, race numbers, seal dimensions, dust cap size, minimum rotor thickness, and included components before installation. Lug nuts, bearings, seal, dust cap, grease, and related installation hardware are sold separately unless specifically stated as included.
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