SKU: 98732279975

RAM Double Ball Mount with Round & Diamond Bases - C Series - Medium Arm

Sale price$118.12 Regular price$131.25
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Description

RAM Double Ball Mount with Round & Diamond Bases - C Series - Medium ArmRAM 138U RAM Double Ball Mount with Round & Diamond Bases C Size Medium The RAM 138U is a drill down mounting solution pairing a round AMPS base and a diamond AMPS base on a medium C Series double socket arm, giving near infinite adjustment with two mounting hole options in one mount. Key Features Round base with the universal AMPS hole pattern for surface mounting; diamond base with the 2 hole AMPS pattern for lighter device holders Includes one

RAM-138U RAM® Double Ball Mount with Round & Diamond Bases – C Size Medium

The RAM-138U is a drill-down mounting solution pairing a round AMPS base and a diamond AMPS base on a medium C Series double socket arm, giving near-infinite adjustment with two mounting-hole options in one mount.

Key Features

  • Round base with the universal AMPS hole pattern for surface mounting; diamond base with the 2-hole AMPS pattern for lighter device holders
  • Includes one round ball base, one diamond ball base, and a C Series medium-length double socket arm
  • RAM® ball-and-socket technology allows near-infinite adjustability and dampens shock and vibration
  • Powder-coated, marine-grade aluminium construction
  • Backed by RAM Mounts' lifetime warranty

Works With

The round base bolts down using the 4-hole or 3-hole AMPS pattern, while the diamond base connects to RAM® and many third-party cradles with the 2-hole AMPS pattern. The 1.5" C Size balls suit any RAM® holder built for a C Size ball.

Dimensions & Specifications

  • Overall height: 187mm (7.35")
  • Diamond base: 61.7 x 33.3mm (2.43 x 1.31"), 2-hole AMPS 48.6mm (1.912") centre-to-centre
  • Round base: 63.5mm (2.5") diameter; 4-hole AMPS 30 x 38mm, 3-hole AMPS 120° 46.0mm
  • Ball size: 1.5" rubber ball, C Size
  • Material: powder-coated marine-grade aluminium
  • Weight: 508g (1.12 lbs)
  • Load rating: 1.814kg (4 lbs) standard use, 1.36kg (3 lbs) heavy-duty use

What's Included

  • RAM-202U round base with 1.5" ball
  • RAM-238U diamond base with 1.5" ball
  • RAM-201U double socket arm for C Size 1.5" balls

FAQs

Q: What size screws do the base plates take?
A: The AMPS patterns most commonly take #8, #10, M4, or M5 screws. If you're pairing this with a RAM® holder, the holder comes with its own hardware; surface-mount hardware for your own application isn't included.

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: 98732279975

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Reviewed in the United States on May 13, 2026
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Chelsea, US
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Perfect size
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Perfect size . This will hold everything you need. It’s not too small not too big
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Janet Becraft
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Reviewed in the United States on April 30, 2026
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Holy Cow
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★★★★★ 5
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