If you want a robust, single-unit solution for large truck and RV GPS units that needs to hold steady in freezing conditions, choose Ramtech Electronics(TM) Car Windshield Suction; if you need a versatile two-pack system specifically designed for handheld Garmin outdoor devices like the Astro or Alpha series, choose Ploughnavi 2.
• This pick is for professional drivers and RV owners who need one secure spot for a big dashboard display.
• Ploughnavi 2: Its biggest strength is getting two complete mounting kits for the price of one, offering immediate backup capacity for dual-handheld setups; the trade-off is a slightly lighter build weight and a design focused on smaller handhelds rather than large vehicle units. This pick is for outdoor enthusiasts, hunters, or families who own multiple handheld GPS units and need redundancy.
The Ramtech mount is engineered with a specific focus on the demands of commercial and recreational vehicle operators. In my analysis, this mechanical advantage suggests a device built to withstand the vibrations and sudden stops common in trucking or long-distance RV travel. The manufacturer explicitly lists compatibility with a wide range of Garmin Auto, Truck, and RV GPS units up to 7 inches. If you are driving an OTR700 series truck or an RV 780, this mount is designed to be your primary anchor point on the windshield.
The physical dimensions of the product reveal a compact footprint, measuring just 2.5 x 2.5 x 2.5 inches. This lightweight profile is a double-edged sword; while it keeps the overall assembly unobtrusive, it places a premium on the quality of the vacuum seal. The locking lever is the critical feature here, allowing you to mechanically press the suction cup against the glass to ensure it doesn't pop off when the temperature drops or the road gets rough.
Who should buy this? You are the ideal candidate if you operate a large vehicle and rely on a dedicated, screen-heavy navigation unit that cannot afford to slide off the windshield during a winter commute. The inclusion of a single cradle bracket means you get a dedicated home for your primary GPS. However, you should skip this option if you run a fleet of handheld devices or need a spare mount ready to go immediately without having to purchase a second kit later. The single-unit nature of the package makes it less flexible for users who constantly switch between multiple handheld units or need a backup mount for a passenger vehicle.
We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-11-06 · 5 min read · Independent comparison
The Ploughnavi 2 takes a different approach by prioritizing volume and versatility over specialized heavy-duty engineering for large screens. As the name implies, this is a two-piece set, providing two distinct windshield holders with cradles. These are rugged, portable devices often used off-road, on hunting trips, or for trail navigation where a driver might carry multiple units for different purposes or crew members.
In terms of construction, the Ploughnavi unit measures 2.5 x 2.5 x 2.2 inches, which is nearly identical in width and depth to the Ramtech model but slightly shorter in height. This extra mass might suggest a more substantial plastic housing or a denser suction component intended to handle the specific contours of handheld devices. The fact that you receive two complete mounts means you can install one in your car and keep another in a truck, or perhaps mount one in the front and one in the rear for better visibility depending on your setup.
This product fits the buyer who values preparation and redundancy. If you are a hunter who carries a handheld GPS for tracking game and another for navigating back to camp, having two mounts ensures you never have to fumble for a loose holder. It is also ideal for families with multiple children who might need their own navigation screens in the back seat. However, you should avoid this if your primary device is a massive 7-inch truck GPS. The cradle design is tailored for the form factor of handhelds, and attempting to force a large, bulky truck unit into a mount meant for a compact Astro or Alpha could result in a poor fit or instability.
• Best for large vehicle GPS units → Ramtech Electronics(TM) Car Windshield Suction, as it is explicitly rated for 7-inch truck and RV displays.
• Best for handheld device flexibility → Ploughnavi 2, because the two-pack allows you to equip multiple devices simultaneously.
• Best value for dual-device users → Ploughnavi 2, since you get two functional mounts in one purchase rather than buying separate single kits.
• Best for minimal footprint → Both are compact, but Ramtech is lighter overall, making it easier to hide when not in use.
• Best for outdoor/recreational use → Ploughnavi 2, given its direct compatibility with the Garmin Astro and Alpha lines used in the field.
• Best for professional trucking/RV → Ramtech Electronics(TM) Car Windshield Suction, matching the specific model numbers of industry-standard navigation gear.
• Best for backup readiness → Ploughnavi 2, offering an immediate spare mount without needing a secondary transaction.
For the vast majority of drivers, especially those facing harsh winter conditions where reliability is non-negotiable, I would choose the Ramtech Electronics(TM) Car Windshield Suction. The locking lever mechanism combined with the larger suction diameter provides a psychological and physical assurance that a heavy truck GPS will stay put, even when the glass freezes or the road gets bumpy. While the Ploughnavi 2 offers great utility for handheld users, the single-unit nature of the Ramtech feels more purpose-built for the high-stakes environment of professional driving. If you are running a large vehicle in cold weather, the security of that lockable base is worth the single-unit constraint.
Yes, the design features a suction cup with a locking lever, which is generally superior for maintaining adhesion in low temperatures compared to passive suction cups.
Correct, the product information confirms a unit count of 2, meaning you receive two complete windshield holders with cradle brackets in the box. This is ideal for users who need a spare or want to mount multiple handheld devices.
No, the specifications list compatibility specifically with the Astro, Alpha, and Map 62/64 series, which are handheld units. The cradle design may not accommodate the larger form factor of the Dezl or OTR series truck GPS units.
This difference reflects the different target devices, with the Ploughnavi units likely having more material to secure smaller handhelds securely.
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