The Stromberg Carlson BA-100 RV Bumper Receiver provides a 2-inch hitch-style opening for compatible accessories, such as certain bicycle racks and cargo trays. This clamp-on adapter is intended for a suitable square RV bumper and must not be used for towing. Use the original assembly instructions to identify the receiver, backing plate and mounting fasteners.
BA-100 factory mounting instructions
The Stromberg Carlson installation sheet shows the receiver tube and top plate clamped around the bumper using the lower back plate and four long bolts. It also explains the alternate underside mounting position when mounting on top would interfere with other equipment.
On a phone, open the original instructions separately to enlarge the assembly illustration.
BA-100 included components and fasteners
| Component | Quantity | Function |
|---|---|---|
| Receiver tube and attached top mounting plate | 1 | 2-inch receiver opening |
| Lower back plate | 1 | Clamps underside of RV bumper |
| M12 × 1.75 × 140 mm bolts | 4 | Connect the upper plate to the lower plate, two on either side of bumper |
| M12 nuts | 4 | Secure the four mounting bolts |
| M10 × 1.50 × 20 mm bolt | 1 | Side tension bolt for installed accessory |
The manufacturer specifies an M12 × 1.75 thread for the four long mounting bolts, and a separate M10 × 1.50 bolt for the receiver's side tension hole. Use the matching factory hardware sizes, and do not confuse the smaller tension bolt with the structural mounting bolts.
Top or underside bumper mounting
For the usual top position, place the receiver plate on the bumper with the tube pointing front to back. Position the back plate beneath the bumper, then pass the four long bolts through both plates, with two bolts in front of and two behind the bumper. Tighten each mounting bolt without exceeding 110 N·m.
When top-mounted clearance is restricted, the manufacturer allows the receiver tube to be fitted underneath the bumper with the bolts running upward and nuts above. The square bumper must be suitable for supporting the chosen load whichever position is used.
Receiver loads and fit
The BA-100's current manufacturer guide specifies square bumpers up to 4⅜ inches. The maximum accessory load is 200 lb, but a lower rating from the RV or bumper manufacturer always takes precedence. Count the attached rack, cargo and accessories together when calculating the load.
For a four-bicycle receiver rack, see the BC-108 parts and mounting guide. For the two-bike platform rack supplied with its own RV bumper adapter, see the BC-202BA parts guide. More references are in the RV rack and accessory diagram index.