RAM® X-Grip® Replacement Post Caps (RAP-UNCAP4BLUEU) by RAM Mounts

Your phone, GPS or gear belongs where you can use it safely, not bouncing around in a pocket or a cubby. The RAM® X-Grip® Replacement Post Caps (part number RAP-UNCAP4BLUEU) is a small RAM part that keeps your existing mount secure, working and looking right. Built by RAM Mounts, the brand trusted by riders and off-roaders, first responders, pilots and anglers, it is engineered to hold tight on rough roads and rougher trails.

At Witchdoctors we stock genuine RAM Mounts parts with the same part numbers RAM uses, so you can build a new setup, replace a worn piece or expand the system you already own with confidence.

Why Choose the RAM® X-Grip® Replacement Post Caps

Rubber caps wear, tethers stretch and knobs go missing. Replacing these small parts restores the original grip and security of your RAM mount without buying a whole new system.

Key Features and Benefits

• Restores the original function of your RAM mount
• Factory RAM part for correct fit
• Inexpensive way to extend mount life
• Easy installation

Specifications

• Brand: RAM Mounts
• Part number: RAP-UNCAP4BLUEU
• Product type: replacement part / accessory
• Warranty: RAM limited lifetime warranty on the mount and components (devices are not covered)
• Origin: listed as Made in the USA

From the Manufacturer

• Compatible with all versions of the RAM X-Grip
• Made of rubber; super glue included

How the RAM Ball-and-Socket System Works

Every RAM mount is built from three interchangeable parts: a base that attaches to your vehicle, a double socket arm, and a holder or accessory for your device. Each base and holder ends in a rubber ball, and the arm’s sockets clamp around those balls when you turn the center knob. The rubber gives the joint grip, lets you set almost any angle, and helps soak up shock and vibration.

Parts only connect within the same ball size, so it pays to know the system:

• A size: 0.75" ball for lightweight devices
• B size: 1" ball, the most popular size for phones, GPS units, cameras and cup holders
• C size: 1.5" ball for tablets and heavier equipment
• D size: 2.25" ball for laptops and heavy-duty loads

This part connects to the RAM B-size system through the holders, adapters or arms noted above.

Materials and Build Quality

RAM builds its mounts from high-strength composite, powder-coated marine-grade aluminum and stainless steel hardware, depending on the part. Composite parts (usually marked with a RAP prefix) are light, strong and rust-proof. Aluminum parts are powder-coated to resist corrosion. Stainless hardware won’t rust in rain, mud, road salt or salt spray, so the mount keeps working season after season.

Fitment and Compatibility

The RAM® X-Grip® Replacement Post Caps is a universal-fit RAM part. It isn’t tied to a model year. Fit depends on the mounting point, such as bar or tube diameter, reservoir screw spacing, thread size or surface type, and for holders on the size of your device.

• Motorcycles, including cruisers, baggers, touring, sport and adventure bikes, with Indian and Victory motorcycles specifically tagged for fit on our site
• ATVs, UTVs and side-by-sides from Arctic Cat, Can Am, CFMOTO, Honda, John Deere, Kawasaki, Polaris, Yamaha
• Boats, trucks, tractors, mowers and equipment wherever the base can attach

Model years: all years, provided the mounting point matches the specifications above. Not sure of your bar size? Use our Roll Cage / Handlebar Measurement Guide before you order.

Installation

1. Identify the worn or missing part.
2. Remove the old part.
3. Install the replacement following the included instructions.
4. Test the mount before riding.

Most installs take under 15 minutes with basic hand tools. Recheck knob tension and fasteners after your first ride.

Where the RAM® X-Grip® Replacement Post Caps Works Best

• Turn-by-turn navigation on cross-country tours and weekend rides
• Music, intercom and ride-tracking apps within easy reach
• Commuting with your phone visible and secure
• Trail maps and GPS tracks on ATV and UTV rides
• Ride-tracking, comms and camera apps on group trail days
• Work use on farm, ranch and job-site machines

Care and Maintenance

• Clean with mild soap and water. Avoid harsh solvents that can dry out the rubber balls.
• Check knob tension and base fasteners periodically, especially on off-road machines.
• Replace worn X-Grip post caps or tethers to keep full grip.
• Inspect rubber balls for cracking after long sun exposure, and replace the part if needed.

Complete Your RAM Setup

Build out or upgrade your mount with these compatible RAM parts:

• RAM® X Grip® Mount Kit Vibe Safe™ U Bolt Short (RAM-B-149Z-A-UN10-46)
• RAM® X-Grip® Large Phone/Phablet Cradle (RAM-HOL-UN10BU)
• RAM® Vibe Safe Adapter (RAP-462NPT)
• RAM® Double Socket Arm Short 2" for 1" Ball Base (RAM-B-201-A)

Browse the full range in our RAM Phone and Device Mounts collection or our Victory and Indian phone and drink mounts.

Helpful Guides From the Witchdoctors Blog

• How to Measure Motorcycle Handlebars
• Can You Ride a Motorcycle in The Rain?
• The Mechanic's Handbook: A Guide to Popular Fasteners and Tools Used on Motorcycles and UTVs

Frequently Asked Questions

Which mounts does it fit?

See the specifications above. X-Grip parts fit RAM X-Grip holders; security knobs fit B-size arms.

Is it waterproof?

RAM mounts are built for all-weather use and the hardware resists corrosion. Unless a holder is specifically rated waterproof, your device still needs its own protection from rain and dust.

Will it damage my handlebars or paint?

Rubber-padded contact points and correct hardware torque prevent damage. Do not over-tighten clamps on chrome or painted parts.

What warranty does RAM offer?

RAM Mounts backs its mounts and components with a limited lifetime warranty. Mounted devices are not covered.

Is the RAM® X-Grip® Replacement Post Caps compatible with my other RAM parts?

It connects to RAM’s B-size system through the holders, adapters or arms described above.

Where to Ride

Put your new RAM mount to work on one of these rides:

• Blue Ridge Parkway (North Carolina and Virginia): 469 miles of mountain curves with no commercial traffic
• Hatfield-McCoy Trails (southern West Virginia): multiple permit-access trail systems across the coalfields

Order Your RAM® X-Grip® Replacement Post Caps Today

Stop juggling your phone and gear and mount it the way the pros do. Add the RAM® X-Grip® Replacement Post Caps (RAP-UNCAP4BLUEU) to your cart today. Witchdoctors ships genuine RAM Mounts parts fast, and our team of riders is ready to help you build the right setup. Questions about fitment? Contact us and we’ll help you choose.

Shipping

Qualifying Retail orders $159.99 or more will receive free ground shipping. Free Shipping Terms and conditions.

All orders over $500 will require a signature.

Please see International Shipping page for orders shipping outside the US.

See our full Shipping Policy page for further details.

Product Availability

We show real time product availability. These products normally ship the same business day but may ship from one of our warehouses across the country. If an item requires additional processing time you will be notified.

Returns

If your order arrives and it is not right, we will we'll fix it. We promise!

Doesn't fit or just not happy with it? You can return any new, unopened, unused or unaltered item within 30 business days of delivery receipt of your item. We will issue a refund to your original payment method.

See our full Return Policy for all of the pertinent details.