A-frames, pop-ups and the retro-styled small trailers share a problem with every light camper: they sit for months, then do a long trip loaded, and the running gear is the last thing anyone looks at. The owner boards ask three things every spring: which bearings, do I even have brakes, and what seal is this. All three are answered by measuring, not by the badge on the front.
Which bearing kit
Small campers run one of three spindle classes, and the class is decided by the axle rating on the plate, or failing that by the drum and the bearing numbers.
| Axle | Drum or hub | Inner | Outer | Seal | Kit |
|---|---|---|---|---|---|
| 2,000 lb | Idler hub, often no drum | L44649 / L44610 | L44649 / L44610 | 1.50 in ID | Two L44649 sets per hub; ask us |
| 3,500 lb | 10 in | L68149 / L68111 | L44649 / L44610 | 10-19 | 10-inch Timken kit |
| 5,200 to 7,000 lb | 12 in | 25580 / 25520 | 14125A / 14276 | 10-36 | 12-inch Timken kit |
Most A-frames and pop-ups are on the 2,000 or 3,500 lb axle; the larger Vintage Cruiser and Retro floor plans are on 3,500 lb, some on the heavier class. Read the numbers off the old cones, stamped on the small face, and you have the answer without guessing. Our guide to bearing kits by axle rating and lug pattern covers the odd cases, and the Timbren lookup covers the axle-less hubs some small campers use. Repack yearly regardless of miles; these are exactly the trailers that sit. The repack guide covers the job, and a fresh cotter pin and a sealing hubcap finish it.
Do you have brakes at all
Many 2,000 lb axles and some 3,500 lb ones on lightweight campers were built without brakes. Pull a wheel and look behind the hub: a plate with four bolt holes around the spindle is a brake flange; a bare spindle means no brakes and no simple way to add them without a flange.
If there is a flange with brakes on it, they are electric drum brakes sized by drum diameter and handed left and right, and a matched pair of assemblies replaces one axle. If there is a flange with no brakes, electric brakes bolt on, and the plain idler hub is replaced with a greased hub-and-drum assembly. Our electric brake conversion guide covers the five parts on the trailer and the two on the tow vehicle, including the breakaway system the law requires above a weight threshold. If there is no flange, it is an axle job, not a parts job.
Whether a small camper needs brakes at all depends on its loaded weight and your state; many A-frames sit right at the threshold. If you tow one with a mid-size SUV in hill country, the answer is yes regardless of the law.
The seals these campers wear out
A-frame roof seams and pop-up bed-end seals are model-specific and come from the maker. Everything else is standard: the entry door, the compartment hatches, the window frames and the lid of the tongue box all use a bubble-profile rubber seal that flattens and hardens in a few seasons. A self-adhesive EPDM bubble seal is the general replacement, fitted in one continuous piece with the old adhesive fully removed; measure the channel width and the old seal's height before ordering. Our Black Series water-leak guide covers the tracing method, which is the same on any camper.
The spares to carry
For a trailer that sits and then goes far: one hub's worth of bearings and seals, a cotter pin, a hubcap, a length of EPDM seal, and every fuse the camper uses. Our spares list for off-road campers is longer than a pop-up needs, but the first five items are the same.
Send us the axle plate, a tape across the drum and a photo behind the hub and we will confirm the kit and whether brakes can be added. Everything ships from Upland, California.