At a Glance
- >Integrated hub and rotor design
- >5 on 4-1/2" bolt pattern
- >1/2" wheel studs
- >Single hub rotor assembly
- Brand: MAT
- SKU: 77-3.5KI-RTR-102
Match the part number, measurements and connection points that apply to your trailer.
| Part Number | Match the number stamped on the original bearing or seal. |
|---|---|
| Dimensions | Measure the mating surfaces when a number is unavailable. |
| Hub / Axle | Use capacity as context, not as the only fitment check. |

Part Number: 77-3.5KI-RTR-102
This hub rotor disc brake assembly includes one integrated hub and rotor designed for use on compatible 3,500 lb trailer axles. The assembly is supplied with 1/2" wheel studs and a 5 on 4-1/2" bolt pattern.
| Part Number | 77-3.5KI-RTR-102 |
| Axle Rating | 3,500 lbs |
| Bolt Pattern | 5 on 4-1/2" |
| Stud Size | 1/2" |
| Inner Bearing | L68149 |
| Outer Bearing | L44649 |
| Compatible Wheel Sizes | 13", 14", 14-1/2", 15" |
| Rotor Type | Standard |
Verify specifications before installation.
Selected from R&P customer feedback for Bearing / Seal products and related trailer service.
“I've ordered lots of trailer repair parts from them, always fast service, well packed, and the right parts. I highly recommend.”
“Would like to say thanks to everyone at R and P Carriages parts were delivered fast and with the very helpful staff, the right parts were sent the first time. Thanks Happy Holiday's.”
“Received swivel d-ring tie down 4 days after my wife ordered them , great price and came with backing plates. I received exactly what I paid for, thanks for the great service. Chris Davis , Mooresville NC”
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