What is the Capacity of a Dexter P-12 Model D100 Axle

Updated 07/09/2025 | Published 05/14/2020

Products Featured in This Question

Dexter Trailer Hub Drum Assembly - 9K to 10K - 8 on 6.5 - Oil Bath - Non-ABS Drum - After July 2009

(30)

$748.75

Replacement Trailer Hub Bearing - 25580

(2012)

$22.66

Replacement Trailer Hub Bearing - 387A

(58)

$30.90

4" Carbon Fiber Digital Caliper

(26)

$12.38

Kodiak Synthetic Bearing Oil for Oil Bath Hubs - 8 oz Bottle

(42)

$23.39

Question:

Dexter p-12 model 0100

asked by: Jonathan S

Expert Reply:

It looks like you're likely trying to replace your hubs/drums on your Dexter axle and I do believe that the "0100" you found on the spec plate actually reads "D100" since that was one of the models that Dexter had for this particular line of axles; I've confirmed this with Dexter as well. These axles were 10k axles and they came in both a general duty and a heavy duty model with the 10k capacity. In order to find out which hub/drum will work as a replacement, you'll need to pull the hubs and check for numbers that are stamped on the backs of the bearings; if there are no numbers stamped on the backs, you can measure the spindle on the axle using a digital calipers like the # PTW80157. I've also attached a diagram of what parts on the spindle would need to be measured. If you there is a casting number on the hub/drum assembly, this would also be helpful.

If you get everything apart and find that you've got a # 25580(1.750") inner bearing and # 387A (2.250") outer bearing, you can use the Dexter Trailer Hub Assembly # 8-430-5UC3, which is designed for 10k axles. Since these are oil bath hubs, you'll want to use the Kodiak Synthetic Bearing Oil # XLPROLUBE. If you get everything apart and find that you've got different bearings on your hubs, please let me know and I can recommend a suitable alternative.

I've linked some review videos of these parts for you to have a look at, as well.

expert reply by: Erik B

Caleb G.

7/8/2025

I have a question I hope you can help. I paid a mechanic to replace my bearings, seals and hub covers along with new electric trailer brakes. All 4 started spraying fluid, overheating and chewing tires up less than 5 miles. He took the stud spacers off and says it doesn’t need them and refuses to fix them or return the spacers. Do they in fact need the spacers for proper alignment

Jameson C.

7/8/2025

@CalebG The spacer wasn't put there for no reason so that's pretty odd he'd take them off and hold them hostage. Do you know what specific hubs you have so I can look further?

Caleb H.

7/9/2025

@JamesonC just the Dexter plate on the axle with serial numbers. He claims that because they put new lug nuts on them they don’t need them. Is it even legal for him to remove parts and keep them without my knowledge or consent

Jameson C.

7/9/2025

@CalebH I would say it's a gray area on whether that's legal as its pretty common for installers to be the one who's in charge of dealing with the old parts that were taken off a vehicle/trailer. I know some assume that's a little bonus they get and will keep parts to resell them etc.