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Questions about RAM® Mounts?
Answers to common questions about systems, compatibility and specifications. If you can’t find what you need, get in touch.
I have an existing system — what do I need?
Arms
- Short: RAM-B-201U-A
- Standard: RAM-B-201U
- Long: RAM-B-201U-C
- Short: RAM-201U-B
- Standard: RAM-201U
- Long: RAM-201U-D
- Short: RAM-D-201U-C
- Standard: RAM-D-201U
Bases
- Flat surface: RAM-B-202U
- Handlebar / rail: RAM-B-231ZU
- Glass surface: RAM-B-224-1U
- Aircraft yoke: RAM-B-121BU
- Flat surface: RAM-202U
- Handlebar / rail: RAM-231U
- Glass surface: RAP-365-224-1U
- Flat surface: RAM-D-202U
- Alternative flat base: RAM-D-254U
- Rail: RAM-D-271U-12
Ball sizes and arm lengths
What weight can each ball size carry?
| Size | Diameter | Standard | Heavy-duty | Low vibration |
|---|---|---|---|---|
| A | 0.56" / 14 mm | 0.25 kg | — | — |
| B | 1" / 25 mm | 0.9 kg (2 lbs) | 0.5 kg | 2.3 kg (5 lbs) |
| C | 1.5" / 38 mm | 1.8 kg (4 lbs) | 1.5 kg | 4.5 kg (10 lbs) |
| D | 2.25" / 57 mm | 2.7 kg (6 lbs) | 2.3 kg | 6.8 kg (15 lbs) |
| E | 3.38" / 86 mm | 6.8 kg (15 lbs) | 4.5 kg | 13.6 kg (30 lbs) |
Examples
- Marine: use lower limits on fast boats, higher on stable vessels.
- Forklifts: use lower limits due to shocks and vibration.
- Motorcycles: stay at or below lower limits, especially for cameras.
What does "U" mean in RAM® part numbers?
The "U" stands for "Unpacked" and refers to the packaging, not the product itself. The "U" is usually found at the end of the part number, but not always.
For example, RAM-B-202 and RAM-B-202U are identical products with different packaging.
- With "U": Typically supplied in a plastic bag or other non-retail packaging.
- Without "U": Retail-packaged, usually in a box or with a hang tag for display in stores.
Both versions offer the same quality, functionality, and compatibility.
The item I want is listed as “On request”
Products marked "On request" are not currently available for direct purchase through our website. However, the item may already be on order or could be assembled from components we have in stock.
Click "Notify me" on the product page and leave your email address and/or phone number. We'll get back to you with availability information. If the item needs to be specially ordered, the lead time is typically 6–8 weeks.
Looking for a faster alternative? Individual components or different configurations may be available. Feel free to contact us and we'll help you find the right solution.
Cosmetic imperfections
Due to the manufacturing and molding process used for RAM® Mounts components, minor cosmetic imperfections may occasionally appear on certain parts of a product.
The most common area is the aluminium neck directly beneath the rubber ball, where small marks, exposed aluminium or minor coating imperfections can occur as part of the molding and clamping process during production.
These cosmetic variations are considered normal manufacturing characteristics and do not affect the product’s functionality, strength, durability or overall performance.
Support video
Product marking
Manufacturer, tests & certifications
National Products Inc.
Seattle, USA
E-mail: support@rammount.com
Phone: 1-800-497-7479
