RAM® Handlebar U-Bolt Base for Rails 0.5" to 1" in Diameter - B Size

Part#: RAM-B-231U
UPC: 793442002229

Kit Components

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$23.49

Overview

The RAM® Handlebar U-Bolt Base (RAM-B-231U) is a rugged mounting base designed for rails 0.5" to 1" in diameter, with an integrated B size rubber ball. This base is compatible with all B size socket arms. The stainless steel u-bolt is secured to rails or handlebars by two nylock nuts and comes with an optional composite adapter that narrows the attachment to the minimum compatible rail width of .5". Cover the end of the u-bolt with the included two rubber caps, ensuring no clothing or equipment get snagged.

Features

  • Zinc-coated metal U-bolt base with 1" rubber ball is designed to sit at right angles to mounting rail; includes black cover caps for exposed ends of the U-bolt
  • Compatible with any B size RAM® Mounts component; ball and socket technology allows for near-infinite adjustability
  • Made of powder-coated, marine-grade aluminum for durability and reliability in the most demanding environments
  • Backed by a lifetime warranty

hardware included:

(1) 1/4"-20 U-Bolt for .5" - 1" Rails
(2) 1/4"-20 Nyloc Nuts
(2) Rubber Caps
(1) U-Bolt Spacer

clamp range:

.5" - 1" diameter

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:

0.22 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.

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RAM® Handlebar U-Bolt Base for Rails 0.5" to 1" in Diameter - B Size
$23.49

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

B Size Double Socket Arms
See All
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