RAM Mounts B-309-7U Combination Base

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Includes U-bolt and all mounting hardware to add a single RAM ball to a 1-1/8" 1" 7/8" or 3/4" diameter bar as well as being able to connect to your handlebar's left-side clutch clamp or right-side brake clamp. read more


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0.45 lbs
1 × 1 × 1 in
Electronics Accessories Type:



$21.99 USD


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$21.99 USD

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This marine-grade rail base has a 1.0” diameter rubber ball designed to sit at right angles to a mounting rail or handlebar. The stainless steel metal U-Bolt and nuts included will fit a circular rail or handlebar with a diameter of 3/4” to 1-1/4”. The base fits the control clamps on your motorcycle with 40mm x 6mm stainless steel hardware provided in the kit.

To mount the rail base place the top of the base on the rail and then slide the U-bolt around the rail into the holes in the base. Then tighten the screws onto the U-bolt until the base is clamped firmly. If you desire you can slide the included black plastic covers over the exposed ends of the U-bolt.

U-Bolt Dimensions:1/4-20 thread X 1″ ID X 2.5″ long
Accommodates rails from 0.5″ to 1.25″ in diameter.  

NOTE: This stainless-steel base is completely rust-proof. The less expensive RAM-B-231Z is zinc-coated and will RUST quickly if used in outdoor motorcycle applications.

RAM Mounts System Guide

RAM Mounts is a rugged and versatile system for attaching and mounting phones tablets GPS units cameras and other mobile devices nearly anywhere. This system utilizes ball and socket connections that can be adjusted to provide a multitude of mounting positions and secured to provide stability during use. Once you have selected the universal grip or device specific cradle you are interested in you will need to select an Adapter Plate a Double Socket Arm and then a Mounting Base to attach to your motorcycle.Adapter PlatesAdapter plates are availaible in chrome or black mount to device cradles and provide a B size 1in rubber ball for an arm extension to attach to and articlate from. They have predrilled holes that match the industry standard AMPS hole pattern. 

Double Socket Arms

Double Socket Arms attach between Adapter Plates and Mounting Bases to provide full articulation and can be tightened to a multitude of secured positions.

Mounting Bases

Mounting Bases attach to your motorcycle and provide a secure platform for the RAM system to work from. Attachment points include handlebars control clamps clutch and brake reservoirs fork stems suction cups mirror mounts as well as exposed or replaceable bolts.


Accessories enhance the capabilities of a RAM Mounts system by providing additional mounting options security or convenience options.

Universal Device Holders or Cradles

Universal device holders or cradles provide a secure mounting solution for a variety of smart phones tablets gadgets or other essentials.

Part Numbers

Our part number: RAM-B-309-7U
Replaces these SKUs: RAM-B-309-1U
Manufacturer part number: RAM-B-309-7U

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What others are saying

  1. Pat B

    Great for Heli Bars

    Pat B

    I bought these for. 2018 Motus that has large diameter Heli bars and they work great

    (0) (0)

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