View Full Version : Hubs on 1998 MC trailer

05-19-2012, 10:15 PM
My trailer has lug nuts/studs on one side and lug bolts on the other. The seller said he lost a wheel on the bolted side once, so I assume there should be studs and nuts. Are the factory studs screwed in from the inside of the hub? What's the proper setup?

05-19-2012, 11:22 PM
Well, I might be able to help with this one.

Do you have a 5-lug wheel, or a 6-lug wheel?

Mine is a single-axle trailer with 6-lug wheels and drum brakes. The wheel studs screw into the brake drums from the outside.

The axles/drums/brakes are all from Unique Functional Products on mine; PM me if you want some info I have. The forum won't let me upload it...


05-19-2012, 11:57 PM
Thanks, Frank. Mine are 6 lug. What keeps the studs from backing out when the nuts are removed? I'm replacing the steel wheels with MC aluminum. I'll get the proper lug nuts, but are the studs the same length? Thanks again-- Kevin

05-20-2012, 01:44 AM
Nothing keeps them from backing out - when I removed the wheels on mine, a couple of the lugs came out rather than having the nut unscrew. No big deal - with the torque removed from them, the lugs unscrewed from the lug nuts relatively easily, and I just put them back into the hub. There's probably a torque spec when placing them back in, but I don't know what it is.

The specs I've worked out for mine over the years are:
Axle: UFP 5200 lb Axle
Hub: Unique Functional Products #42 (HD-1750)
Inner Outer
Spindle 1.75" 1.25"
Bearings BR25580 LM67048
Bearing cups BR25520 LM67010

Hub Seal OD 3.265" 2.328"
Hub Seal ID 2.125"
Hub Seal Model 326-213-sp2-1 or UFP 07029U
(NOK Equiv AD7131E)
(Transcom equiv 21325TB)

Bearing Buddy Model #2328

OEM Brake Backing Plates: Dico 12"x2", standard.
Brake shoes: FMSI #62