RAM Mounts Google Search

RAM® Double Ball Adapter with Round Base and Knob

RAM® Double Ball Adapter with Round Base and Knob - Main image
$60.34 $84.99 In stock

Category: Components

The RAM® Double Ball Adapter with Round Base and Knob is a RAM Mounts component for building or adjusting a mounting setup. It is identified by SKU RAM-217U and belongs to the C Size 1.5" ball system, which is rated to hold up to 4 lbs.

  • RAM Mounts component: RAM® Double Ball Adapter with Round Base and Knob
  • SKU: RAM-217U
  • C Size 1.5" ball system, rated to hold 4 lbs
  • Round base with knob and double ball adapter design
  • Compatible hole patterns noted in product tags: 3-Hole 120 Degree (Small) and AMPS 4-Hole
Before you pay

Check the method and total at checkout.

When it ships

Allow for processing time as well as the journey to you.

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

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

View policy
If you need a refund

Keep your order number and contact the store to start.

Please contact us for the refund processing timeframe before returning an item.

View policy
Delivery costs

Review the cost for your destination and chosen service.

Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

View policy
Returning an item

Check the return conditions before sending anything back.

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

View policy

Customer Reviews (4.8 / 5 · 5 reviews)

Stella ★★★★★

Adding the knob to the base makes it so easy to adjust the angle without any tools, and the double ball gives me tons of mounting options.

Joseph C. ★★★★★

The C Size 1.5" ball fits perfectly into my existing mount setup, and the double ball design gives me that extra flexibility I was hoping for. The knob on the round base tightens securely, keeping everything rock-solid even on bumpy roads.

Edward ★★★★★

The ball on this adapter locks into place perfectly with the round base, making my GPS mount feel rock solid on bumpy roads. I’ve been using it for a week now and the knob is easy to adjust even with gloves on. Setup took less than five minutes and it hasn’t loosened up at all.