RAM® Double Ball Mount with 11mm Bolt Head Adapter

Part#: RAM-B-179U
UPC: 793442921841

Kit Components

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$40.99

Overview

The RAM-B-179U consists of a 1" diameter ball base, connected to a 2.25" x 0.875" base with 11mm hole, double socket arm and diamond base adapter. This mount is often used on motorcycles, attaching to the mirror frame, most commonly found on BMW motorcycles. as well as many handlebar pinchbolts with a washer (base is 5mm thick). The 2.43" x 1.31" diamond base contains two holes 1.912" from center to center, matches the industry standard AMPS hole pattern and will connect to a large variety of RAM Mount and third party cradles. The mount is designed with a RAM 1" diameter patented rubber ball and socket system that has adjustment points at both ends of the double socket arm; this allowing for almost infinite adjustment and perfect viewing angles.

socket to socket length:

3"

hole pattern:

2-Hole AMPS: 1.912"

ball size:

B Size (1")

weight capacity:

Standard Use: 2 lbs
Heavy-Duty Use: 1 lb

materials:

Marine-grade aluminum

packaging type:

Poly Bag

Weight:

0.45 lb

Return Policy:

All products purchased from RAM® can be returned within 30 days with no restocking fee (return shipping not provided). See full return policy here.

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RAM® Double Ball Mount with 11mm Bolt Head Adapter
$40.99

Size Guide

Ball sizes
  • A Size 0.56" ball
  • B Size — this product 1" ball
  • C Size 1.5" ball
  • D Size 2.25" ball
  • E Size 3.38" ball

Every RAM® mount is built around a rubber ball and socket system. The ball size sets how much weight the mount can carry. Match it to your device for smooth adjustment with a rock-solid hold.

RAM Mounts ball size specifications and typical uses
Size Ball Diameter Max Load* Best For
A0.56" (14.3 mm)0.5 lbAction cameras and other ultra-light devices
B — this product1" (25.4 mm)2 lbsPhones, GPS units, and small tablets — the most common size
C1.5" (38.1 mm)4 lbsLarge tablets, fish finders, and rougher rides
D2.25" (57.2 mm)6 lbsRugged tablets, laptops, and heavy equipment
E3.38" (85.9 mm)15 lbsLarge displays and demanding aviation or industrial use

*Approximate capacity for a standard ball with a mid-length arm. Shorter arms and steel-reinforced posts increase real-world capacity.

Reading part numbers

The letter after RAM tells you the ball size: RAM-B-166 uses a 1" B ball, while RAM-D-201 uses a 2.25" D ball. C size parts are the exception and carry no letter, so RAM-201U is a C size arm.

Add-on & Accessories

Locking Knobs
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