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HAULK DEPOT

Trailer Bearing – 3984 – For 12K–15K Axles
SKU: TB3984
$21.00 USD $21.00 USD $24.00 USD
Sale 12.5% $3.00 USD (12.5%)
Shipping calculated at checkout.
In stock
Description

Built for heavy-duty trailer applications, the 3984 tapered roller bearing is ideal for 12,000–15,000 lb axle hubs. With a 2.625" inner diameter and durable steel construction, it delivers dependable performance under high-speed and high-load conditions. For optimal fit, pair with race 3920 (sold separately).

Detailed Information:
Inner Diameter 2.625 inches
Matching Race 3920 (sold separately)
Fitting:

Compatible with Dexter 12K–15K axle hubs including models: 8-216-5, 8-214-8, 8-217-5, and 8-727-5. Used as an inner bearing for high-capacity trailer wheel assemblies.

Features:
  • High Load Endurance: Designed to maintain performance in heavy-duty use.
  • Tapered Design: Promotes even load distribution and minimizes heat build-up.
  • Reliable Construction: Made from premium-grade steel for longevity and strength.
Interchangeable Part Numbers:
  • DEXTER 3984
  • TIMKEN 3984
  • BTR3984
Product Overview:

The 3984 bearing ensures consistent operation in demanding trailer setups rated up to 15K. When paired with the 3920 race and quality lubrication, it helps extend the life of your axle assembly and maintain safe towing performance.

We want you to be completely satisfied with your purchase. That’s why we offer a hassle-free return policy within 30 days of delivery*. If your item is unused, in original packaging, and eligible for return, you can send it back for a refund or exchange.

*Some exclusions may apply

Some of our products are backed by a 1-year limited manufacturer warranty covering defects in materials and workmanship under normal use. If you experience any issues during this period, we’ll work with you to repair, replace, or resolve it according to warranty terms.*

*Proof of purchase required

Need it fast? We’ve got you covered. Orders confirmed before 3 PM Eastern Standard Time (Monday–Friday) are processed and shipped out the same business day. Orders placed after the cutoff will ship the next business day.
Trailer Bearing – 3984 – For 12K–15K Axles

Customer Reviews

Based on 12 reviews
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(11)
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H
Hewe Beaves
Durable and Ready for the Long Haul

Installed six of these across my fleet. Zero failures or comebacks. The 3984 is a workhorse bearing when you need reliability on 12K+ axles. Highly recommend for commercial use.

G
Gunar Kincade
Precision Fit and Smooth Roll

Checked with calipers and feeler gauge—dimensions are spot-on. Rollers move freely with no drag. The steel finish suggests proper heat treatment. Exactly what heavy trailers need.

T
Torey Blackford
Great for High-Speed Towing

I tow heavy machinery at 70+ mph. This bearing runs cool and stable. No heat discoloration after long runs. Paired with a 3920 race and high-temp grease—perfect combo.

E
Eben Stairmand
Reliable Bearing for High-Capacity Trailers

Replacing OEM bearings on my equipment trailer. This 3984 matches the Timken unit I pulled out—same weight, finish, and feel. Confirmed compatibility with 8-216-5 hub. Trusted component.

C
Carlos Mendoza
Used in Emergency Field Replacement

Bearing failed mid-haul. Ordered overnight and had it installed the next morning. Fit my 8-727-5 hub perfectly. Got me back on the road fast—critical for uptime.

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