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RAM Mounts D-Size Standard Double Socket Arm for 2.25 Inch Balls

RAM Mounts D-Size Standard Arm (2.25" Ball) | RAM-D-201U

1895111
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Compatibility:

✅ Compatible RAM Components
Fits any D-Size (2.25") Ball Base or Plate:
• RAM-D-111U / RAM-D-115U Kits
• RAM-D-202U (Round Base)
• RAM-D-246U (VESA Plate)
• RAM-D-254U (Clamp Base)

✅ Recommended Units (When paired with correct bases)
• Humminbird HELIX 8, 9, 10, 12, 15
• Humminbird SOLIX 10, 12, 15
• Humminbird APEX 13, 16, 19
• Lowrance HDS LIVE 12, 16
• Garmin GPSMAP 1222, 8612, 8616

❌ NOT Compatible
• C-Size Balls (1.5" Diameter) - Too Small
• B-Size Balls (1" Diameter) - Way Too Small
• E-Size Balls (3.38" Diameter) - Too Big

The Backbone for Big Screens

When you are mounting a 10, 12, or 15-inch fish finder, you cannot rely on standard mounts. The RAM-D-201U is the "Standard Length" double socket arm for the massive D-Size (2.25") ball system. It is the structural core that connects your base to your unit bracket.

Heavy Duty Holding Power:

Made from powder-coated marine-grade aluminum, this arm features a large tightening knob that clamps down on the rubber balls with immense force, preventing your SOLIX or HELIX from drooping in rough water.

📦 Product Specs:

  • Part Number: RAM-D-201U
  • Ball Size: D-Size (2.25 Inch Diameter)
  • Overall Length: 8.375 Inches
  • Socket-to-Socket Length: 6.56 Inches
  • Material: Marine Grade Aluminum
🍁 Why Buy from PTG Electronics?
We are Canada’s specialized marine electronics hub and authorized service center. Unlike American retailers, we stock our inventory in Winnipeg, Manitoba. You get your gear faster with zero customs fees or hidden duties.

Frequently Asked Questions

How do I know if I have a D-Size mount?

Measure the diameter of the rubber ball on your boat. If it measures 2.25 inches (roughly the size of a billiard ball), it is a D-Size. If it measures 1.5 inches (golf ball size), it is a C-Size. This arm ONLY fits the large 2.25" balls.

Is this the "Short" arm or "Standard" arm?

This (RAM-D-201U) is the Standard Length arm (approx. 8.4" total). The "Short" arm (RAM-D-201U-C) is significantly more compact (approx. 5" total). Most anglers prefer the standard arm for better screen positioning height.

Will this hold my 16-inch graph?

Yes. The D-Size system is rated for up to 15 lbs in heavy-duty environments (like a boat pounding waves) and up to 6 lbs in static environments. It is the standard choice for 12" and 16" units.