At a Glance
- SKU: 33667U-KIT
PRODUCT INFORMATION
Product Details
UFP TRAILER HUB ASSEMBLY
4,200 lb UFP Idler Hub Assembly Kit 5 on 4.5" Bolt Pattern | Straight Spindle
R&P Kit SKU:
33667U-KIT
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UFP Hub Part #:
33667U
A complete UFP-style idler hub replacement kit for compatible 4,200 lb trailer axle applications. Designed for straight spindles using identical L68149 inner and outer bearings, this assembly provides the essential components needed to replace a compatible five-lug idler hub.
Commonly associated with UFP and Load Rite marine trailer applications. Confirm spindle dimensions, bearing numbers, seal requirements, and wheel bolt pattern before ordering.
Quick Specifications
| Axle Application | 4,200 lb |
| Hub Type | Idler - Non-Braking |
| Wheel Bolt Pattern | 5 on 4.5" |
| Spindle Configuration | Straight, 1-3/8" bearing journals |
| Inner Bearing | L68149 |
| Outer Bearing | L68149 |
| Included Oil Seal | 32123 - 1.68" x 2.56" |
| Dust Cap | 36189U - 2.328" OD |
| Wheel Stud Thread | 1/2"-20 |
Affordable Pricing
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Fast Shipping
Ships from our warehouse
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Fitment Help
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Product Overview
The UFP 33667U idler hub is used in compatible marine trailer axle applications requiring a 5 on 4.5" wheel bolt pattern and straight spindle bearing arrangement.
Unlike stepped spindle configurations that use different inner and outer bearings, this hub uses two L68149 bearings with nominal 1-3/8" inner diameters. The kit includes a replacement seal, plated dust cap with lubrication hole, rubber dust cap insert, and five matching lug nuts.
The included 32123 oil seal has a nominal 1.68" inner diameter and 2.56" outer diameter. Seal dimensions and lubrication-system compatibility should be checked against the original hub assembly before installation.
What's In The Box
One (1) complete replacement hub kit containing:
| QTY | COMPONENT | PART # |
| 1 | UFP Idler Hub, 5 on 4.5" | 33667U |
| 2 | Inner / Outer Bearings, L68149, 1.378" ID | L68149 |
| 1 | Oil Seal, 1.68" x 2.56" | 32123 |
| 1 | Plated Dust Cap with Lube Hole, 2.328" OD | 36189U |
| 1 | Rubber Dust Cap Insert | DC-RP |
| 5 | 1/2"-20 Conical Lug Nuts | X1023R |
Kit contents reflect the R&P Carriages bill of materials for SKU 33667U-KIT.
Features & Benefits
| ✓ | 4,200 lb trailer axle application with the correct matching spindle and hub configuration. |
| ✓ | Straight spindle design using identical L68149 inner and outer bearings. |
| ✓ | Standard 5 on 4.5" wheel bolt pattern with 1/2"-20 wheel studs. |
| ✓ | Includes matching replacement components identified individually by part number. |
Application & Fitment
This hub configuration is commonly associated with UFP and Load Rite marine trailers equipped with compatible straight-spindle axle assemblies. Trailer brand or axle weight rating alone does not establish fitment.
Before ordering, confirm:
• Your existing inner bearing is L68149.
• Your existing outer bearing is also L68149.
• Your axle uses a straight, not stepped, spindle.
• Your wheel bolt pattern is 5 on 4.5".
• Your original seal dimensions and seal type match the intended replacement.
• The included cap and seal suit your trailer's lubrication system.
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R&P Knowledge Hub
Important fitment distinction: This is a straight-spindle hub using L68149 bearings in both positions. It is not interchangeable with hubs designed for stepped spindles.
Seal & lubrication note: This R&P kit includes seal 32123. Do not assume that seals with matching dimensions are interchangeable across all grease, oil, or Vault lubrication systems. Confirm the seal specification and lubrication requirements for your original assembly.
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R&P Service & Repair Insight
When replacing a trailer hub, inspect the spindle bearing journals, seal surface, and bearing races for scoring, corrosion, or wear. Verify proper bearing adjustment, lubrication, and wheel fastener torque according to the axle and component manufacturer's service instructions before returning the trailer to service.
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Not Sure If This Hub Will Fit?
Send us a message with your existing bearing numbers, seal measurements, or hub part number. Our trailer-parts team can help you identify the correct replacement.
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Related Parts & Kits
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