JBP-712.1 — Extreme 7-inch support block, single
View JBP-712.1 productStromberg Base Pad Extreme vs Peak: Jack Block Dimensions
Stromberg Carlson makes two molded support-block families for parked RVs. Base Pad Extreme is the wider, lower polycarbonate block often used with hydraulic leveling feet. Base Pad Peak has a narrower top and taller profile suited to the contact area of a compatible scissor, stabilizer or tongue jack. Neither is a substitute for a properly rated jack or a vehicle lifting stand.
Extreme versus Peak — measurements and limits
| Specification | Base Pad Extreme (JBP-712) | Base Pad Peak (JBP-813) |
|---|---|---|
| Top contact area | Approx. 10 inches across | Approx. 5¼ × 9¼ inches |
| Ground footprint | Approx. 12 inches across base | Approx. 10 × 13 inches |
| Single block height | 7 inches | 8 inches |
| Two stacked blocks | 12⅜ inches high | 14 inches high |
| Capacity, single | 6,000 lb | 3,500 lb |
| Capacity, two stacked | 3,500 lb | 3,000 lb |
| Material | High-strength polycarbonate | High-strength lightweight plastic |
Choose the block that suits the jack foot
Extreme — broad top
A round or broad leveling foot must fit securely and centrally on its approximately 10-inch top.
Peak — shaped top
The narrower approximately 5¼ × 9¼-inch contact area suits the particular scissor/stabilizer-jack base format.
Stacking reduces ratings
The maker gives lower capacities when using two blocks stacked together. Do not apply the single-block rating to the stack.
Pads on soft ground
Stromberg permits compatible 1- or 2-inch Base Pads with Extreme blocks for softer ground conditions.
Dimensions and limits are manufacturer specifications, not a universal fitment approval or a vehicle-lifting procedure.
Available Base Pad Extreme packages
| Model | Manufacturer package count | Product link |
|---|---|---|
| JBP-712.1 | One block | JBP-712.1 |
| JBP-712.2 | Two blocks | JBP-712.2 |
| JBP-712.4 | Four blocks | JBP-712.4 |
Available Base Pad Peak packages
| Model | Manufacturer package count | Product link |
|---|---|---|
| JBP-813.1 | One block | JBP-813.1 |
| JBP-813.2 | Two blocks | JBP-813.2 |
| JBP-813.4 | Four blocks | JBP-813.4 |
| JBP-813.5 | Five blocks | JBP-813.5 |
Compare the two shapes
View JBP-712.1 productJBP-813.1 — Peak 8-inch support block, single
View JBP-813.1 productPlacing a support block
- Verify that the RV maker permits a freestanding support block beneath the particular leveling or stabilizing foot.
- Measure the jack's contact area and the required ground-to-foot height; choose the correct block shape and quantity.
- Use a firm, level surface and place the block directly beneath the appropriate foot.
- Stay within the manufacturer's limit for the exact single or stacked arrangement, and use the RV's standard leveling procedure.
- Remove blocks and store them before travel.
Manufacturer references: Stromberg Base Pad Extreme and Stromberg Base Pad Peak specifications.
If you need a thinner loose rubber pad instead of a tall block, use the EPDM Base Pad size guide.
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