SKU: 82233389820

RAM Clamp Base - Square 51mm Post Clamp Base with 2.25 inch (D Series) Ball

Sale price$93.33 Regular price$103.70
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Ships within 48 hours · Estimated delivery Oct 1 - Oct 6

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Description

RAM Clamp Base - Square 51mm Post Clamp Base with 2.25 inch (D Series) BallRAM D 247U 2 Square Post Clamp Base (51mm, D Size Ball) The RAM D 247U 2 is a RAM Mounts square post clamp base for posts and rails up to 51mm (2") wide, fitted with a D size 2. 25" rubber ball. The larger D ball suits heavier devices and larger displays, and pairs with any D size double socket arm. Key Features Clamps onto square posts and rails up to 51mm (2") wide; adjustable and easily removed or repositioned Includes a D size 2. 25" RAM rubber

RAM-D-247U-2 Square Post Clamp Base (51mm, D Size Ball)

The RAM-D-247U-2 is a RAM Mounts square post clamp base for posts and rails up to 51mm (2") wide, fitted with a D size 2.25" rubber ball. The larger D ball suits heavier devices and larger displays, and pairs with any D size double socket arm.

Key Features

  • Clamps onto square posts and rails up to 51mm (2") wide; adjustable and easily removed or repositioned
  • Includes a D size 2.25" RAM rubber ball that connects to any D size RAM double socket arm
  • RAM rubber ball-and-socket design gives near-infinite angle adjustment
  • Powder-coated marine-grade aluminium, built for vibration and weather
  • Backed by RAM's lifetime warranty

Works With

Any D size (2.25" ball) RAM component: connect a D size double socket arm, then add a D size ball adapter or device holder to suit your gear. The base is removable and can be repositioned along the post at any time.

Dimensions & Specifications

  • Maximum post width: 51mm (2")
  • Ball size: 2.25" (D size)
  • Weight capacity, standard use: 2.72kg (6 lbs)
  • Weight capacity, heavy-duty use: 2.26kg (5 lbs)
  • Product weight: 430g (0.95 lb)
  • Material: powder-coated marine-grade aluminium
  • Hardware included: (2) 5/16"-18 x 3" machine screws, (2) 5/16"-18 Nylock nuts

FAQs

What size post does it fit? Square posts and rails up to 51mm (2") wide.

What does it connect to? Any D size RAM arm and holder via the included 2.25" ball.

Is the mounting hardware included? Yes, two 5/16"-18 x 3" machine screws and two Nylock nuts.

How is it dispatched? In stock items ship from our Auckland warehouse, normally within one business day of your order.

Watch the product video

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 82233389820

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Shopper
Houston, US
★★★★★ 3
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Seemed “cheap” for my personal needs, so I returned it.
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Reviewed in the United States on March 23, 2026
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james
Lexington, US
★★★★★ 5
Would recommend
Size: 10 sqft
I used this sound deadening material in my car during an audio and interior upgrade, and the difference was noticeable immediately. Road noise, vibrations, and rattling were reduced a lot, especially on the doors and floor panels. The car feels much quieter and more solid while driving now. The material was easy to cut and apply, and the adhesive stuck very well without peeling up. It has a quality feel to it and conforms nicely around curves and tight areas. I also noticed my speakers sound cleaner and have better bass response after installing it. For the price, this sound deadening material is a great value and definitely worth it if you want a quieter ride and better overall sound quality in your vehicle.
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Reviewed in the United States on June 6, 2026
D
Verified Purchase
David
Boise, US
★★★★★ 5
Worth it!
Size: 50 sqft
I was worried it wouldn't work as well since it's 50 mil and I thought I got the wrong thing. Nope! Works great. Did all four doors on my 93 civic and I have enough for the floor I think. Solid price. Noise reduced by about 5 decibels hive difference. Very sticky and easy to apply I'm so happy I was able to cover most all of my car. If I need more, definitely buying this since I got so much extra and I thought I would. PS: that five decibel thing is only with the four doors. My firewall is next and then my floor, but it's such a huge difference
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Reviewed in the United States on April 2, 2026
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Teresa A. Patterson
Cuba, US
★★★★★ 5
Quiet your vehicle noises
Size: 50 sqft
Put this in our high roof van and couldn’t believe how much quieter it was at once. Really cut down on the vibration noise Nice and easy to install just peel n stick. Was also easy to cut with scissors for smaller areas. Seemed to be really nice quality. Didn’t notice any odor.
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Reviewed in the United States on June 9, 2026
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Stephanie
West Palm Beach, US
★★★★★ 5
Sound deadening the Hot Rod
Size: 20 sqft, Size: 20 sqft
Works well, good value for the money. It’s very sticky and conforms to what you are applying it to. One 20 sq ft box did approximately the passenger side
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Reviewed in the United States on April 3, 2026

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