A good phone holder for mountain biking needs to stay secure over rough terrain, keep your phone protected and fit your handlebars or stem. Roots, rocks, drops and jumps put your setup to the test, so choosing the right mount matters.
For most mountain bikers, a Quad Lock Handlebar/Stem Mountpaired with a Quad Lock case is a compact, secure option. Riders who regularly use navigation may prefer the Quad Lock Out Front Mount, which positions the screen for easier viewing.
Quad Lock's patented dual-stage locking system twists on and clicks into place, creating a secure mechanical connection between your phone and bike.
This guide covers what to look for in an MTB phone mount, how the main mount types compare and which Quad Lock bike mount suits your setup.
What to look for in a mountain bike phone holder
Five things matter on the trail.
- A lock that holds over rough ground. Roots, rocks and repeated impacts put your phone mount to the test. Quad Lock's patented dual-stage lock uses a mechanical twist-and-lock connection designed to keep your phone securely attached while riding.
- A low, protected position. A phone positioned high or far in front of the handlebars may be more exposed during a fall. Mounting on the stem keeps it closer to the centre of the bike and creates a compact setup.
- A fit for MTB bars and stems. Most modern mountain bikes use 31.8 mm or 35 mm handlebar clamp diameters. The Quad Lock Out Front Mount suits both, while the Handlebar/Stem Mount fits compatible tubes from 25 to 40 mm in diameter.
- Fast on, fast off. Whether you're stopping for photos, checking trail maps or taking a call, your phone should be easy to remove. Quad Lock's twist-and-lock system lets you attach and detach your phone without tools.
- A case that protects your phone off the bike. Quad Lock cases combine a protective shell with impact-absorbing materials. The mounting interface is built into the case, so there's nothing extra to attach.
MTB phone mount types compared
There are several ways to carry your phone on a mountain bike. Here's how the main options compare.
| Mount type | How it holds your phone | Where it sits | Fits | Best for |
|---|---|---|---|---|
| Quad Lock Handlebar/Stem Mount | Dual-stage twist-and-lock, attached with O-rings or zip ties | On the stem, tucked behind the bars | Any tube or bar from 25 to 40 mm | Trail, enduro and riders who swap between bikes |
| Quad Lock Stem Cap Mount | Dual-stage twist-and-lock, held in place by the stem cap | On top of the stem, behind the bars | 28.6 mm (1-1/8 in) steerers, stem angles of +/-15°, or up to +55° with the Adjustable | Clean cockpits and riders who want a low, permanent fit |
| Quad Lock Out Front Mount | Dual-stage twist-and-lock, bolted to the bar | In front of the bars, or reversed over the stem | Round bars of 22, 25.4, 31.8 and 35 mm | Cross-country and riders who navigate on the go |
| Clamp or cradle holder | Spring arms or grips around the phone | On the bars | Most bars and phones | Smooth paths and occasional use |
| Silicone strap holder | Stretch bands around the corners of the phone | On the bars or stem | Most bars and phones | Light use on easy trails |
Clamp and strap holders vary in quality and retention strength. Some are designed for rougher terrain, while others are better suited to smoother paths.
For technical mountain biking, a purpose-built mechanical locking system is worth considering. Quad Lock's dual-stage lock provides a secure connection without relying on grips around the edges of your phone.
Which Quad Lock mount is best for your mountain bike?
Trail and enduro: Quad Lock Handlebar/Stem Mount
The Quad Lock Handlebar/Stem Mountis a compact option for technical trails, rocky descents and enduro riding.
It sits low on the stem or handlebars, keeping your phone close to the bike without extending far beyond the cockpit.
Strong O-rings hold the mount in place, or you can use the included zip ties for a more permanent installation. The lightweight design also makes it easy to transfer between compatible bikes.
It suits tubes from 25 to 40 mm in diameter and works with Quad Lock cases and Universal Adaptors.
Alternatively, the Stem Cap Mountsits between your stem and stem cap, so your phone rides low and centred on top of the stem with no bands or clamps on the bars. Forged from aircraft-grade aluminium and heat-treated, it is built for strength. The dual-sided head flips to suit stem angles of +/-15°. Running a steeper stem? The Stem Cap Mount Adjustable uses a hinge you tighten at your preferred angle, up to +55°.
Cross-country and navigation: Quad Lock Out Front Mount
The Quad Lock Out Front Mountbolts directly to your handlebars, positioning your screen for easy viewing of maps and ride stats.
It can also be reversed to sit over the stem, creating a more compact setup for rougher trails.
The mount fits round handlebars with diameters of 22, 25.4, 31.8 and 35 mm, and is compatible with the Quad Lock Light/Camera Adaptor.
It's a practical choice for cross-country riders and anyone who regularly uses their phone for navigation.
Gravel and road crossover: Quad Lock Out Front Mount Pro
The Quad Lock Out Front Mount Profeatures a precision CNC-machined aluminium arm with a low-profile design.
Built with road and gravel riding in mind, it positions your phone further forward for easy viewing of navigation and ride data.
Unlike the standard Out Front Mount, the Pro version cannot be reversed over the stem. Riders tackling technical MTB trails may prefer the more compact Handlebar/Stem Mount or standard Out Front Mount.
All three mounts work with Quad Lock cases and compatible Universal Adaptors. The Out Front Mount and Out Front Mount Pro are designed for round handlebars, not flat or aero bars.
Trail-proof your setup
Position for crashes. Mount on the stem with the Handlebar/Stem Mount or Stem Cap Mount, or reverse the Out Front Mount over the stem. Your phone sits behind the bars, so the bars take the impact first.
Ride in the wet. Add the Quad Lock Poncho, a weatherproof cover that keeps rain and mud off your screen while it stays touch-friendly.
Vibration. Bikes do not create the high-frequency vibration that motorcycle engines do, so you do not need a vibration dampener on your mountain bike mount. Quad Lock recommends its Vibration Dampener for motorcycles only.
Check before you drop in. Give your phone a firm tug after twisting it on. If it has clicked into the dual-stage lock, it will not move.
Take it with you. Twist your phone off at the café or the car park. The mount stays on the bike.
Frequently asked questions
Do I need a vibration dampener for my phone on a mountain bike?
No. Bicycles do not produce the high-frequency vibration of motorcycle engines. Quad Lock recommends its Vibration Dampener for motorcycles only.
What is the best phone holder for mountain biking?
For most trail and enduro riders, the Quad Lock Handlebar/Stem Mount paired with a Quad Lock case is a compact, secure option. Its patented dual-stage locking system is designed to keep your phone attached over rough terrain. For cross-country riders who regularly use navigation, the Quad Lock Out Front Mount offers easier screen visibility.
Is Quad Lock secure enough for mountain biking?
Yes. Quad Lock bike mounts use a patented dual-stage mechanical locking system designed to keep your phone securely attached over bumps, rocks and uneven terrain. Always ensure the mount is correctly installed and the phone is fully locked before riding.
Does a Quad Lock mount fit 35 mm mountain bike handlebars?
Yes. The Quad Lock Out Front Mount fits round handlebars with diameters of 22, 25.4, 31.8 and 35 mm. The Handlebar/Stem Mount fits compatible tubes from 25 to 40 mm in diameter. Check the diameter at your intended mounting position before installation.
Can I move my Quad Lock mount between bikes?
Yes. The Quad Lock Handlebar/Stem Mount uses EPDM O-rings, making it easy to remove and reinstall on compatible bikes. Check that the mount fits securely each time you transfer it.
Can I use a Quad Lock bike mount without a Quad Lock case?
Yes. The Quad Lock Universal Adaptorattaches to compatible phone cases and works with Quad Lock twist-and-lock mounts.
The adhesive requires a suitable surface and won't bond reliably to materials such as silicone, TPU, rubber or leather. Check Quad Lock's surface compatibility guidelines before installation.
Find the right Quad Lock mount for your ride
Whether you're tackling technical trails, heading out for a cross-country ride or exploring new routes, the right phone mount should suit your bike and riding style.
Quad Lock's patented dual-stage locking system offers a secure, easy-to-use mounting solution, with options for different handlebars, stems and riding conditions.
Explore the Quad Lock range of bike mounts and phone cases to find your setup.
