JBP-C300 — Single curved wheel leveler set
View JBP-C300 productStromberg JBP-C300 & C302 RV Wheel Levelers: Parts & Setup
Stromberg Carlson's Base Pad Leveler raises a trailer wheel gradually to help level a parked RV from side to side. Instead of stacking loose boards beneath the tire, it uses a curved leveling wedge, separate locking chock and rubber anti-slip mat. The complete system comes as one set (JBP-C300) or two matching sets (JBP-C302).
Which Base Pad Leveler package should you choose?
Manufacturer dimensions and operating range
| Specification | Stromberg Carlson figure |
|---|---|
| Leveling wedge footprint | 11 inches long × 7 inches wide |
| Maximum wedge height | 4¼ inches |
| Available tire lift | Approximately ½ inch to 4 inches, depending on wheel position |
| Rated capacity | 30,000 lb under the manufacturer's specified loading conditions |
| Construction | Lightweight, high-strength material with curved edges for removal between close-set wheels |
The wedge's 4¼-inch physical height is not the same as its maximum 4-inch leveling lift. The capacity is a rating for the product, not an increase to your tires, axles or trailer weight rating.
Identify the pieces and their positions
1Anti-slip rubber mat
Lies flat on stable ground beneath the leveling wedge and helps keep it positioned.
2Curved leveling wedge
The tire travels slowly up the tapered surface until the required side-to-side level is achieved.
3Locking chock
Fits beneath the raised end of the leveler wedge to secure it against backward movement.
4Opposite-wheel chocks
Additional appropriate wheel chocks remain necessary to restrain the RV while parked.
Original component illustration for identification. Use the factory instructions for the precise tire, wedge and chock positions.
See the exact packages
View JBP-C300 productJBP-C302 — Two curved wheel leveler sets
View JBP-C302 productHow to level and secure the trailer
- Choose firm ground, keep the towing area clear and place the supplied mat at the wheel being raised.
- Set the wedge's tapered end beneath that tire, then carefully drive forward a short distance until the desired level is achieved.
- Place the supplied locking chock beneath the wedge as shown by Stromberg. Before unhitching, also chock the other wheels appropriately.
- If using the tandem-axle configuration, follow Stromberg's recommendation to level and chock both wheels where appropriate.
- Before departing, remove the locking chock and drive off slowly under the manufacturer's procedure. Store all three components.
Manufacturer instructions and related products
For the original positioning photographs and safe removal sequence, see Stromberg's JBP-C300/JBP-C302 installation sheet (PDF). The Base Pad Leveler manufacturer page includes the size and capacity specifications.
These under-wheel wedges serve a different purpose from the T-Chock placed between tandem tires or the blocks placed under stabilizer-jack feet.
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