At a Glance
- >4,200 lb UFP boat trailer axles
- >Ranger boat trailers
- >Straight spindle design (non-tapered)
- >Services one hub / one side of the axle
- >(2) Outer Bearings – L68110
- Brand: R&P CARRIAGES
- SKU: BK-4200-UFP
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: BK-4200-UFP
This listing is for a bearing and seal kit for one side of the axle on a 4,200 lb UFP Ranger boat trailer equipped with a straight spindle. The kit includes both inner and outer bearings with matching races, along with the correct oil seal.
| Axle Rating | 4,200 lb |
| Spindle Type | Straight Spindle |
| Outer Bearing | L68110 |
| Outer Race O.D. | 2.328" |
| Inner Bearing | L68149 |
| Oil Seal Size | 1.68" ID × 2.56" OD |
| Coverage | One hub (one side) |
Designed for UFP Ranger boat trailers using straight spindles. Always verify bearing numbers and seal dimensions before installation, as spindle configurations can vary by model year.