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Pulling heavy or long distances can build up serious heat in the brakes. This hub-and-rotor assembly keeps things cool with a vented rotor design that channels air through the rotor to prevent overheating and warping. The precision-machined cast iron runs true for consistent braking, even under full 7,000-lb axle loads.
Moisture, salt, and grime can eat away at bare metal fast. The E-coat finish on this Dexter hub adds a tough protective layer that resists corrosion and surface wear. Whether the trailer sits outside or sees regular road spray, the coating helps keep the hub looking clean and performing reliably over time.
Swapping hubs doesn’t have to be complicated. This 12-1/4" Dexter assembly comes ready with the inner bearing (25580), outer bearing (14125A), both races (25520 and 14276), grease seal (GS-2250DL), and grease cap already included. With everything matched and sized correctly—1.75" inner bearing ID, 1.25" outer bearing ID—it installs smoothly on standard 7K spindles.
Heavy loads demand solid parts that stay true under stress. The one-piece cast iron build eliminates gaps where contaminants can wedge between rotor and hub, keeping runout low and performance steady. That strong construction gives dependable braking response run after run on 16", 16-1/2", or 17" wheels with an 8 on 6-1/2" bolt pattern and 5/8" wheel studs.
1. Count the lug holes
Look at the wheel hub or the back of the wheel and count how many lug holes there are(also called bolt holes).
Common configurations include: 4-lug, 5-lug, 6-lug and 8 lug
2a. For even lug counts (4-lug, 6-lug, 8-lug)
Measure from the center of one lug hole directly across to the center of the hole opposite it.
Common configurations: 4 on 4", 6 on 5.5", 8 on 6.5"
2b. For odd lug counts (5-lug)
Measure from the center of one lug hole to the outer edge of the hole directly across (not center-to-center since there's no directly opposite hole).
Common configurations: 5 on 4.5" (most popular), 5 on 5", 5 on 4.75", 5 on 5.5"
Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Speaker 1: Today we're going to take a look at the Dexter 12-and-a-quarter inch e-coat hub and rotor assembly with the eight on six-and-a-half inch bolt pattern for 7,000 pound Dexter axles. Now, this hub and rotor assembly is designed to work with 7,000 pound Dexter axles with disc brakes. The rotor itself has a machine process, which will minimize run out and warping. That will help keep contaminants from getting in between your rotor and your hub. The rotor is a van tip design you can see right here. That dissipates the heat, so it regulates temperature to prevent over-heating.
It is a cast iron construction, so it does provide strength and durability. It has a nice e-coat finish over it to protect against corrosion and wear.This part number will include everything shown here on the table; the hub and rotor, the inner, the outer bearings. The bearing races are included. They are just pre-installed in the hub. The double lip grease seal, the grease cap, the eight wheel lug nuts and these are the five-eighths inch by eighteen lug nuts, and all these parts are made in the USA.A few specs on this; it is designed to fit the axle of 7,000 pound Dexter axle with disc brakes.
The wheel size it will fit on this is a 16 inch, 16-and-a-half, and 17 inch. The bolt pattern, again, is an eight on six-and-a-half inch bolt pattern. The wheel studs here on this are a five-eighth inch diameter. Rotor diameter itself, from edge to edge, is 12-and-a-quarter inches.Now, the information on the bearing races and seals, the bearings, the inner bearing is a part number 25580. It has a 1.75 inch inner-diameter.
The outer bearing is part number 14125a. It has a 1.25 inner-diameter. The races, we mentioned, are pre-installed. The grease seal is included and it's part number gs-2250dl. Inner-diameter is 2.25 inches.
Outer-diameter is 3.376 inches. The grease cap is included. As we mentioned, the eight five-eighths by 18 lug nuts.That should do it for the review on the Dexter 12-and-a-quarter inch e-coat hub and rotor assembly with the eight on six-and-a-half inch bolt pattern for 7,000 pound Dexter axles.
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Lemmonaid
4/11/2025
Still running strong.