If you own a Garmin vehicle GPS and want to mount it using a RAM Mount, you might notice a problem: the mounting systems are not directly compatible. Garmin has released over 100 GPS units in the past decade, and most of them use a standard 17mm ball and socket design. RAM Mounts, by contrast, typically use a 1-inch ball, which is about 50% larger than Garmin’s 17mm socket. This difference prevents a direct connection.
Despite the size mismatch, it is possible to connect a Garmin cradle to a RAM Mount using the right adapter. This article explains the basics of Garmin cradles, the differences in ball sizes, and how to successfully attach a Garmin GPS to a RAM Mount. We also highlight the best mount options for vehicle use and provide tips to ensure a secure and long-lasting setup.
Understanding Garmin Cradles
Every Garmin vehicle GPS has two essential components: the cradle and the mount. The cradle holds the device securely, while the mount attaches to your windshield, dashboard, or other surface. Most Garmin cradles use a 17mm ball socket on the back. This has been a consistent design from the first Nuvi models to the current Drive series.
Some newer Garmin models experiment with alternative mounting methods, including magnetic mounts or 22mm balls, but the 17mm standard remains the most common. This is important because any solution to attach a Garmin cradle to a RAM Mount must account for the ball size difference.
Why RAM Mounts Don’t Fit Garmin Directly
RAM Mounts are popular because they are durable, adjustable, and modular. They use 1-inch balls that allow arms and cradles to rotate freely. However, these balls are too large to fit into Garmin’s 17mm cradle sockets. No matter how much force you apply, the Garmin cradle will not attach directly to a standard RAM 1-inch ball.
Many buyers make the mistake of trying to force a Garmin cradle onto a RAM ball, or assume that specialized RAM Snap Link Garmin adapters will work with any 1-inch RAM arm. Unfortunately, these solutions do not solve the size mismatch problem. To connect a Garmin cradle to a RAM Mount, you need a proper adapter that bridges the 17mm and 1-inch sizes.
The Solution: Ball Adapters
The most common and effective solution is the Arkon 25mm Ball to 17mm Ball Adapter. One end of this adapter features a standard 1-inch ball for the RAM arm, and the other end has a 17mm ball that fits Garmin cradles. It’s an inexpensive solution to the problem.
Installation is simple. Insert the 1-inch ball into your RAM arm socket and attach the 17mm side to the Garmin cradle. The adapter allows you to securely mount your Garmin GPS without drilling or modifying your devices.
This solution also future-proofs your setup. If Garmin continues using the 17mm ball socket design, you can continue using the same RAM Mount for new GPS models without purchasing a completely new mount system.
Upgrading Your Mount
Once you have the adapter in place, you can upgrade to a more robust RAM Mount setup. One of the most popular choices is the RAM Double Ball Twist-Lock Suction Cup Mount. This mount uses a 3-inch arm, extends further than the standard Garmin suction cup, and has a twist-lock vacuum base for secure attachment. The Arkon part just discussed replaces the diamond adapter on the end.
Replacing the stock Garmin suction cup mount with a RAM mount plus the Arkon adapter gives you a more flexible and adjustable GPS setup. You can reposition the GPS for optimal visibility and safety while driving.
The Arkon adapter allows a Garmin cradle to fit securely onto a RAM Mount arm.
Summary of Mount Options
Here’s a quick overview of the main components used in this setup:
- RAM 1-inch Ball Mount: Standard RAM ball for arms and universal mounts.
- Arkon 25mm Ball to 17mm Adapter: Bridges RAM mounts to Garmin cradles. Compatible with most Garmin GPS units.
- RAM Double Ball Twist-Lock Suction Mount: Uses a 3-inch arm for flexibility, twist-lock vacuum base, lifetime warranty, compatible with the Arkon adapter.
Tips for Best Performance
This setup works best in low-vibration environments such as cars and trucks. Avoid using it on motorcycles or vehicles with extreme vibrations, as the ball-and-socket connection may loosen over time.
Always check the tightness of the adapter and RAM arm before driving. The adapter itself is inexpensive, so replacing it if damaged is easy.
Because the RAM mount arm is adjustable, you can easily position your Garmin GPS for glare-free visibility and driver safety. This flexibility is especially useful for larger vehicles, trucks, and SUVs where the windshield or dashboard angles vary.
Personal Opinion
Replacing the inexpensive stock mount is a good idea. The quality of the RAM Mount is one of the best and it comes with a lifetime warranty. Use it for practically every GPS model in the future.
One thing not discussed is the availability of custom cradles for many GPS models. RAM has made selective custom cradles for certain GPS units. It’s worth consideration for the most secure hold.
