Fork stem mounts are one of the cleanest ways to mount a phone on a motorcycle. They use the hollow center tube at the top of the triple tree as the mounting point, placing the phone directly in front of the rider without taking up valuable handlebar space. On sport bikes with crowded clip-on handlebars, a motorcycle fork stem phone mount is often the cleanest practical solution.
This guide covers the best motorcycle fork stem phone mounts, how to determine whether your bike is compatible, what stem diameter you need, and the vibration considerations worth knowing before mounting a modern smartphone.
Quick Comparison: Best Motorcycle Fork Stem Phone Mounts
| Mount | Best For | Stem Diameter |
|---|---|---|
| Quad Lock Fork Stem Mount | Best Overall / Cleanest Install | 12.7–24mm |
| BRCOVAN Fork Stem Phone Mount | Best Value / Built-In Vibration Dampener | 12–25.4mm |
| RAM X-Grip Large Fork Stem Kit | Best for Large Phones / Maximum Adjustability | 12–38mm |
| Techmount Fork Stem Phone Mount | Best Compact Universal Option | 13–24mm |
| Peak Design Motorcycle Stem Mount | Best Premium Design | Check compatibility |
What Is a Fork Stem Mount and How Does It Work?
The fork stem, also called the steering stem, runs through the center of the motorcycle’s triple tree. Many sport bikes have an open hollow section at the top of the stem, which gives a phone mount a secure attachment point.
Most fork stem mounts use an expansion plug that slides into this opening. Tightening the center bolt expands the plug against the inside wall of the stem, creating a secure friction fit. The phone holder then sits above the triple tree between the handlebars.
The result is a centered mounting position that does not require clamping anything to the handlebars.
That is particularly useful on sport bikes. Clip-on handlebars often leave very little unused tubing between the controls, master cylinders and upper triple clamp.
Is Your Motorcycle Compatible? Check This First
Fork stem mounts require an accessible opening in the center of the upper steering stem. Before buying one, look at the center of the top triple tree on your motorcycle.
If there is an open hollow tube, a fork stem mount may work.
If the opening is covered, check whether the cap is removable. Some motorcycles have removable cosmetic or protective caps while others use a design that is not suitable for an expansion-style fork stem mount.
Stem diameter matters just as much.
Different mounts cover different ranges, and there is no single size that fits every motorcycle. Measuring the inside diameter with a caliper is the safest approach when you cannot find reliable fitment information for your exact bike.
As a general rule, fork stem mounts are most common on:
Sport bikes — Yamaha R-series, Kawasaki Ninja, Honda CBR, Suzuki GSX-R, BMW S1000RR and Ducati Panigale motorcycles are typical applications where a centered fork stem mount can make a lot of sense.
Naked bikes — compatibility varies, but many have accessible stems.
ADV motorcycles — some work well with stem mounts, although these bikes typically have more handlebar space and therefore more mounting choices.
Cruisers — fork stem mounting is less common and handlebar or control mounts are usually more practical.
Best Motorcycle Fork Stem Phone Mount: Quad Lock
The Quad Lock Fork Stem Mount is my top choice when the goal is a clean, low-profile installation.
It is also the mount shown installed in the photo at the top of this guide.
Instead of gripping the sides of the phone with spring-loaded arms, Quad Lock uses its dual-stage mechanical locking system. The phone attaches with a short twist and locks positively into the mount.
The biggest tradeoff is that you need a Quad Lock case or compatible universal adapter. Once you are in that ecosystem, however, the same phone can be moved between motorcycle, car, bicycle and other Quad Lock mounts.
The fork stem version fits stem openings from approximately 12.7mm to 24mm, so measure before ordering.
For motorcycles, I would also add the Quad Lock Vibration Dampener. It installs between the mounting head and phone interface to isolate some of the high-frequency vibration that can reach the camera hardware inside modern smartphones.
Best Value: BRCOVAN Fork Stem Phone Mount with Vibration Dampener
The BRCOVAN fork stem mount is the value pick because it combines the stem base, adjustable phone cradle and vibration dampening into one package.
That is an important difference from systems where vibration isolation is an additional accessory.
The aluminum-alloy fork stem base is designed for stem openings from 12mm to 25.4mm. The phone cradle is adjustable and is intended for larger modern smartphones rather than requiring a dedicated phone case.
The cradle wraps around the phone mechanically, so this is also a good choice for someone who does not want to commit to the Quad Lock case ecosystem.
The built-in vibration dampening is another reason I like it for sport-bike use. No motorcycle phone mount can completely eliminate vibration, but having isolation designed into the holder is preferable to attaching a phone directly to a rigid stem base.
Best for Large Phones: RAM X-Grip Large Fork Stem Kit
RAM remains one of the better choices when adjustability matters more than having the smallest possible mount.
The Large X-Grip fork stem kit combines RAM’s expansion-style fork stem base, short double-socket arm and large X-Grip phone holder.
The biggest advantage is the ball-and-socket design. You can adjust the phone vertically, tilt it toward the rider, shift it slightly to one side or reposition it to clear the instrument cluster.
The fork stem base handles a particularly wide 12mm to 38mm range, making this one of the more flexible options when it comes to stem size.
The Large X-Grip is also a better fit for today’s larger smartphones and thicker cases than older standard-size X-Grip cradles.
RAM includes a rubber safety tether with the X-Grip. On a motorcycle, I would use it.
Best Compact Universal Option: Techmount Fork Stem Phone Mount
The Techmount fork stem kit takes a more traditional approach than Quad Lock or Peak Design.
Instead of requiring a special phone case, it uses a universal phone holder attached to a compact fork stem base. That makes it appealing if you want a relatively small installation without buying into a proprietary phone-case system.
The mount is designed for stem openings from approximately 13mm to 24mm, which is a smaller range than the RAM kit. Measure your motorcycle before ordering.
Techmount has also been making motorcycle electronics mounts for years, and this design can be used for phones and other relatively small electronic devices.
It is not as sleek as the Quad Lock system and does not include the integrated vibration isolation found on the BRCOVAN, but it fills a useful middle ground between those two approaches.
Best Premium Option: Peak Design Motorcycle Stem Mount
Peak Design offers another very clean fork stem solution, particularly for riders already using its Mobile phone-case system.
The attraction is the combination of magnetic alignment and a mechanical locking connection. The magnets help position the phone, but they are not the only thing keeping it attached to the motorcycle.
That gives Peak Design a very different feel from a traditional spring-loaded cradle.
The mount also sits relatively low over the triple tree and uses machined metal components that look appropriate on a modern sport bike.
Peak Design also offers charging configurations within its motorcycle mounting system. Check the exact configuration and stem compatibility before ordering, since the charging hardware and phone case requirements differ from the basic mount.
Motorcycle Vibration and Phone Camera Damage
Vibration deserves more attention with a motorcycle phone mount than it does with a car mount.
Modern phones often use optical image stabilization and autofocus systems containing tiny moving components. Extended exposure to the high-frequency vibration produced by some motorcycle engines can potentially affect those camera systems.
That does not mean every motorcycle will damage every phone.
It does mean vibration isolation is worth considering, particularly on high-RPM motorcycles or when the phone spends a lot of time mounted to the bike.
Quad Lock offers a dedicated vibration dampener.
The BRCOVAN mount includes vibration isolation in the holder itself.
RAM’s rubber ball-and-socket system provides some isolation and flexibility, although it is not the same thing as a dedicated camera-protection dampener.
If you use a current premium smartphone with expensive camera hardware, I would favor a setup that includes some form of vibration isolation.
How to Install a Motorcycle Fork Stem Phone Mount
1. Verify the stem opening. Confirm that the motorcycle has an accessible hollow stem suitable for the mount you are considering.
2. Measure the inside diameter. A cheap digital caliper takes the guesswork out of this. Compare the measurement with the manufacturer’s specified range.
3. Clean the inside of the opening. Dirt, grease or corrosion can reduce how securely an expansion plug grips the inside wall.
4. Insert the correct expansion plug or sleeve. Follow the instructions supplied with your particular mount. Different manufacturers use different expansion systems.
5. Tighten the base securely. The goal is a base that cannot rotate or pull upward under normal riding forces. Follow the manufacturer’s tightening instructions rather than simply applying as much force as possible.
6. Position the phone. Adjust the holder so you can see the screen without blocking the motorcycle’s gauges or warning lights.
7. Check full steering movement. Turn the handlebars all the way left and right. Make sure the phone, mount and arm cannot contact the fuel tank, fairing, windshield, ignition, cables or controls.
8. Test everything before riding normally. Start with a short, low-speed ride and recheck the stem base afterward.
Frequently Asked Questions
How do I know if my motorcycle can use a fork stem phone mount?
Look at the center of the upper triple tree. You need an accessible stem opening that matches the diameter range specified by the mount manufacturer. Some motorcycles have removable caps, so an opening may not be obvious until the cap is removed.
What motorcycles commonly use fork stem mounts?
They are particularly common on sport bikes such as the Yamaha R-series, Kawasaki Ninja, Honda CBR, Suzuki GSX-R, BMW S1000RR and Ducati Panigale because clip-on handlebars leave relatively little room for conventional handlebar clamps.
What is the best motorcycle fork stem phone mount?
For the cleanest overall installation, my pick is the Quad Lock Fork Stem Mount with its optional vibration dampener. BRCOVAN is a strong alternative if you want a universal phone cradle with vibration dampening already incorporated into the mount.
Do I need a special phone case for a fork stem mount?
It depends on the system. Quad Lock and Peak Design are designed around their respective phone-case or adapter systems. RAM, BRCOVAN and Techmount use universal phone cradles that do not require a dedicated case.
Do I need a vibration dampener?
I recommend vibration isolation when mounting a modern smartphone on a motorcycle, particularly on motorcycles that produce substantial high-frequency vibration. Some mounts include vibration dampening while others offer it as an accessory.
Can a fork stem mount hold a GPS instead of a phone?
Some systems can. RAM is particularly useful for this because its ball-and-socket components can be combined with many different GPS cradles and electronic-device holders.
Do I need a mechanic to install a fork stem phone mount?
Most expansion-style fork stem phone mounts are designed for owner installation and require only basic hand tools. Follow the mount manufacturer’s instructions carefully, verify that the base is secure and make sure the installation does not interfere with steering, controls or instruments.
