RAM® Rail Clamp Ball Base for 2" - 2.5" Rails - D Size

Part#: RAM-D-271U-2
UPC: 793442227127
$95.99

Overview

The RAM-D-271U-2, round pipe base, consists of a 2.25" rubber ball connected that will connect to a pipe tubing diameter from 2" to 2.5" in diameter.

hardware included:

(4) 1/4"-20 x 1.5" Screws
(4) 1/4"-20 Nyloc Nuts
(4) Rubber Caps

clamp range:

2" - 2.5" diameter

ball size:

D Size (2.25")

weight capacity:

Standard Use: 6 lbs
Heavy-Duty Use: 5 lbs

materials:

Marine-grade aluminum

packaging type:

Poly Bag

Weight:

1.22 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.

Print

Documents

Drawing File: Rail Clamp Base (Large)
Material Handling Catalog
Knowledge Base: Ball Sizes

QUESTIONS & ANSWERS

Have a Question?

Ask a Question

  • Is there a rod holder that fits this ball?

    The only rod holder that can support the D Size 2.25" ball is the RAM-D-119 which is a universal tube holder and comes with a drill-down ball base.
RAM® Rail Clamp Ball Base for 2" - 2.5" Rails - D Size
$95.99

Size Guide

Ball sizes
  • A Size 0.56" ball
  • B Size 1" ball
  • C Size 1.5" ball
  • D Size — this product 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
B1" (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
D — this product2.25" (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