RAM® Double Ball Mount with Diamond Plate Adapter - Medium

Name: RAM® Double Ball Mount with Diamond Plate Adapter - Medium
Brand: RAM Mounts
SKU: RAM-138U
Price: 38.43 USD
Availability: InStock
Rating: 4.6 (5 reviews)

RAM® Double Ball Mount with Diamond Plate Adapter - Medium - Main image

$38.43 ~~$61.99~~ In stock

Category: Universal Mounts

The RAM-138U consists of a 2.5" diameter round base that contains the universal AMPs hole pattern, double socket arm and diamond base adapter. The mount is designed with a 1.5" diameter patented rubber ball and socket system that has adjustment points at both ends of the double socket arm; this allowing for almost infinite adjustment and perfect viewing angles. The hole pattern found on the diamond base adapter will connect to most RAM cradles. The included RAM’s patented design dampens shock and vibration, helping to extend the life of your device.

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Standard Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

Express Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

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Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

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United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

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Customer Reviews (4.6 / 5 · 5 reviews)

Richard ★★★★★ Oct 22, 2026

The double socket arm gives me tons of flexibility for positioning my device, and the rubber ball mount holds firm even on rough gravel roads. No wobble at all after a week of daily driving.

Samuel ★★★★★ Oct 20, 2026

The 2.5” base with the AMPs pattern lined up perfectly with my existing holes, no drilling needed. The double socket arm holds my tablet steady even on rough gravel roads, and the diamond adapter gives me just enough tilt range to get the angle right.

Evelyn B. ★★★★★ Oct 18, 2026

The rubber ball really locks tight once you tighten the knob—no wobble at all. I mounted my GPS on the diamond plate adapter and it feels solid over rough roads. Exactly what I needed for a clean install.