RAM Mounts Medium Double Socket Arm for B Size 1″ Ball Mount Components (RAM-B-201U)
Quick take
The RAM-B-201U is a medium double socket arm designed to connect B-size (1-inch) ball mount components in the RAM mounting system. It uses a marine-grade aluminum build and an adjustable knob for lots of positioning flexibility, with standard-use support up to 2 lb. The key limitation is compatibility, you need RAM B-size (1-inch) parts for it to fit and work as intended.
Pros and cons
Pros
- Marine-grade, powder-coated aluminum construction meant for tough environments.
- Double socket design with an easy-to-adjust knob for flexible positioning.
- Medium length option (overall length 3.73 inches) for a balanced mount height.
- Designed for standard loads up to 2 lb (and heavy-duty use up to 1 lb).
Cons
- Not a universal arm, it’s made to attach to RAM B-size (1-inch) ball components.
- No stated water resistance rating, so it’s not positioned as a waterproof mount arm.
- One review theme suggests that if the arm’s adjustment is loosened too much, it can come apart.
What buyers think
Buyer-review evidence is strongly positive for the overall build quality and holding power of RAM’s components, especially for use cases involving vibration and movement. Multiple shoppers describe RAM arms as solid and staying put once tightened, and they highlight the practical value of the ball-and-socket flexibility when positioning devices on vehicles or bikes. Some reviews also discuss the “length tradeoff,” noting that arm length affects how much the setup flexes and how readable screens are while riding. Since the review excerpts are limited, buyer-review evidence is not detailed enough to quantify performance by device type, but the recurring themes point to reliable stability when properly tightened and a sensible balance between adjustability and stiffness at the medium length.
What this arm is, and how it fits RAM’s system
The RAM-B-201U is a connector arm for RAM’s B-size (1-inch) ball mount ecosystem. Instead of being a complete device mount, it’s the intermediary “arm” that links a ball base to a second ball socket, so you can set the height and angle that works for your setup.
It’s built around a medium double socket arm format with an overall length of 3.73 inches and a socket-to-socket length of 3 inches. In practice, that medium length is often a compromise between being close to the mounting surface (less movement) and giving enough reach to get a screen or accessory into view.
Key specs that matter in real installs
Length and positioning
The arm’s overall length is 3.73 inches. The double socket layout and adjustable knob are meant to let you fine-tune the orientation of your connected device. If you are building a custom vehicle mount or replacing an arm inside your existing RAM system, this medium size is the “middle” choice that can help you dial in viewing angles.
Load and use expectations
It’s specified for up to 2 lb for standard use, and 1 lb for heavy-duty use. That means it can be appropriate for many GPS units, phones, and smaller accessories, but it may not be the best choice for heavier gear unless your overall mount configuration and load are within the stated limits.
Materials and durability
The arm is made from powder-coated, marine-grade aluminum. That matters if you mount gear in environments with rain exposure, salt air, or general outdoor wear. Note that there is no water resistance rating listed here, so if you need an explicitly waterproof mounting component, you may want to confirm protection requirements for your application.
Pros and cons in plain terms
- Best for builders who already have (or want) a RAM B-size (1-inch) mounting system. If your base and holder are built for B-size components, this arm is a straightforward way to set reach and angle.
- Great when you want adjustability without switching to a different mounting ecosystem. The double socket design helps you reposition devices as your install needs change.
- Medium length is a practical middle ground. It can help visibility compared to shorter arms, while typically avoiding the extra reach that may increase flex on longer setups (a length tradeoff some buyers mention).
- Use with care if you tend to leave mounts loose.
Who should buy it
- People assembling a vehicle or bike mount using RAM B-size (1-inch) ball components (bases and device holders).
- Shoppers who want a medium arm length (3.73 inches overall) to improve visibility without jumping to the longest reach option.
- Buyers prioritizing a durable metal arm built for vibration-prone environments.
Who should avoid it
- If you need a universal arm that fits non-RAM mounting systems or smaller/larger ball sizes, this one is not the right match.
- If your main requirement is guaranteed water resistance, you may want to look for components with an explicit water rating or confirm your protection approach for outdoor exposure.
Price and availability
Pricing can vary, and this item has a current price point listed with a higher list price reference. For the most accurate cost and availability, check the live listing before ordering.
Final verdict
The RAM-B-201U is a strong choice when you need a medium-length double socket arm for RAM’s B-size (1-inch) mounting ecosystem. It’s built from marine-grade aluminum, intended for flexible positioning, and supported by load guidance that fits many common vehicle accessories. The biggest buying caveat is compatibility, if your existing base and holder are not B-size (1-inch) RAM components, this arm won’t plug into the system the way you need.
FAQ
Is the RAM-B-201U compatible with all RAM mount components?
No. It’s intended for RAM B-size (1-inch) ball components. If your bases or device holders are C-size or D-size (or use a different ball diameter), you’ll need the corresponding arm size for that ecosystem.
How long is the medium double socket arm?
The arm’s overall length is 3.73 inches, with a socket-to-socket length of 3 inches.
What load is this arm rated for?
It’s specified for up to 2 lb for standard use, and up to 1 lb for heavy-duty use.
Is this arm water resistant or waterproof?
There is no water resistance rating listed for this specific arm. While it uses marine-grade aluminum, you should still plan for your mount’s exposure and protection needs in wet conditions.
Does the adjustable knob hold position securely?
RAM’s ball-and-socket design is intended to stay in position once tightened, and buyers commonly describe the system as staying put during movement. If the adjustment is loosened too much, it may come apart, so tightening matters.
Specifications
| Product Title | RAM Mounts Medium Double Socket Arm for B Size 1″ Ball Mount Components, RAM Mount Connector Arm, Marine-Grade Aluminum RAM-B-201U |
|---|---|
| Category | Electronics > GPS, Finders & Accessories > GPS System Accessories > Vehicle Mounts |
| Brand | RAM MOUNTS |
| Manufacturer | RAM MOUNTS |
| Model Name | RAM MOUNTS RAM-B-201U |
| Model Number | RAM-B-201U |
| Color | Black |
| Item Weight | 4.96 ounces |
| Compatible Devices | 1 |
| Compatible Phone Models | Compatible with B-Size (1") RAM Mounts Components |
| Mounting Type | Dashboard" or "Vehichle Mount |
| Additional Features | Adjustable, Marine Grade Aluminum Construction |
| Weight Capacity Maximum | 2 Pounds |
| Water Resistance Level | Not Water Resistant |
| Compatible with Vehicle Type | Automobile |
| Item Dimensions | 4 x 2.5 x 1.5 inches |
| Arm Length | 3.73 Inches |
| Shape | L-Shape |
| UPC | 885721211320 793442102011 133588520872 012301122879 021112010121 611104340482 104584168832 |
| Mfr Part Number | RAM-B-201U |
| Warranty Description | Manufacturer |
| Built-In Media | RAM MOUNTS RAM-B-201U |
| Item Type Name | Vehicle Mounts |
| Enclosure Material | Aluminum |
Available variants
Size
- 2.4 in.
- 6 in.
- 3.7 in.
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