Replacement Hub For Old #42 Spindle  

Question:

Expert Reply:

Hi Jeremy, you’re very close on your measurements, and I can see why this has been confusing. The bearing sizes you listed line up with a #42 style spindle using a 25580 inner bearing and a 1.25 inch outer bearing like the 14125A or 15123, which is typically found on 5,200 to 6,000 lb axles. That setup absolutely works with a 6 on 5.5 idler hub, so you’re not limited to an 8 lug pattern.

The DeeMaxx idler hub, part # DE29NR, is one of the closest modern options to what you’re describing. It matches the bearing combination and bolt pattern but I want to be upfront about your seal measurement, because this is where things don’t quite add up. A 48 mm seal inner diameter (1.89 inches) is noticeably smaller than what we normally see on a standard #42 spindle, and this DeeMaxx hub is built for a larger seal surface. Because of that, I can’t confidently say this hub will fit your spindle as-is. With older trailers, it’s not uncommon to run into non-standard or outdated seal sizes, and that seems to be what you’re dealing with here. The best next step would be to measure the actual spindle surface where the seal rides, not just the old seal itself, or check for a part number on your current seal. That will tell us exactly what size you need and whether this hub can be made to work.

If it turns out your spindle is using a non-standard seal size, which can happen on older trailers, another option would be replacing the spindle so you can move to a more modern, standard setup. That would open up a lot more straightforward hub options and make future maintenance easier, but I know that’s a bigger step.

You’re definitely in the right range with the bearings and bolt pattern, we just need to nail down that seal size to be sure. Let me know what you find out when you measure and I can confirm the next step.

expert reply by: Heather A

0

Jeremy W.

3/25/2026

Hello, The part number on the seal was CHO 14350.

Heather A.

3/25/2026

@JeremyW that CHO 14350 seal really helps explain what you’re running into, and I want to be upfront with you so you don’t keep chasing parts that almost fit. That seal is from an older setup that isn’t commonly supported by modern hubs anymore, which is why everything lines up on the bearings but not on the seal side. At this point, the cleanest and most reliable solution is to get an axle replacement.