RAM® Handlebar U-Bolt Base for Rails 0.5" to 1.25" in Diameter - B Size

Part#: RAM-B-231ZU
UPC: 793442002755

Kit Components

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$20.99

Overview

Ideal for motorcycle handlebars, the RAM-B-231ZU consists of a 1" B size rubber ball attached to a zinc-coated metal U-bolt base. Designed to sit at right angles to the mounting rail, the U-bolt base accommodates rails from .5" to 1.25" in diameter. Included are black cover caps to be placed over the exposed ends of the U-bolt as well as a composite adapter that can narrow the rail to a minimum width of .5".

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
(1) 1/4"-20 U-Bolt for 1" - 1.25" Rails
(2) 1/4"-20 Nyloc Nuts
(2) Rubber Caps
(1) U-Bolt Spacer

clamp range:

.5" - 1.25" 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:

0.27 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.

QUESTIONS & ANSWERS

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  • Do I need to use the plastic shim when installing this base?

    No, the shim is just there in case your handlebar is too narrow for the U-Bolt to get a good grip. If the U-Bolt fits well without the shim there is no reason to use it.

RAM® Handlebar U-Bolt Base for Rails 0.5" to 1.25" in Diameter - B Size
$20.99

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

B Size Double Socket Arms
See All
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