Deerfun detachable bike phone holder (universal 4" to 6.7" handlebar mount)
Quick take
The Deerfun detachable bike phone holder is a silicone-strap handlebar mount designed for 4.0 to 6.7 inch smartphones, with a 360° rotatable head and the convenience of removing your phone without fully uninstalling the mount. It is easiest to recommend for commuter bikes, e-bikes, and casual rides where tool-free setup and quick phone access matter. The main caution is screen access around the phone corners and the fact it is not meant for hard-core use on rough off-road terrain or motorcycles.
Pros and cons
Pros
- Detachable design lets you take the phone on and off without disassembling the whole mount.
- Tool-free installation with a built-in silicone pad, tightened onto the handlebar for a firm grip.
- Fits most handlebars in the 18–35mm range and supports 360° rotation for landscape or portrait viewing.
- Strap-based design can help absorb road vibration compared with rigid mounting systems.
Cons
- Corner friction and strap placement can make the very corners of the touchscreen harder to reach.
- Not positioned as a motorcycle or hard-core mountain biking mount, based on buyer-use guidance.
- Not water resistant, so you will want to protect your phone in wet weather.
What buyers think
Buyer-review evidence is broadly positive for day-to-day usability. People repeatedly highlight that it installs easily, stays secure on normal bumpy roads, and holds the phone firmly enough for commuting. Several reviews also emphasize the detaching convenience, especially compared with bulkier or more fiddly mounts. The most consistent friction point is touchscreen access near the phone corners when the straps grip the edges.
How the detachable mount works, and why it matters
This mount uses stretchy silicone bands and a handlebar clamp mechanism to hold your phone in place. The headline feature is the detachable design: you can remove the phone for breaks, quick errands, or when leaving the bike, without needing to fully loosen or take off the handlebar mount.
In practice, that convenience is what reduces the “fighting the mount” feeling some people get with more complex systems. If you frequently stop to answer calls, check GPS, or want quick camera access, this design is built around that workflow.
Fit and compatibility: phones and handlebars
Phone size range
The mount is intended for smartphones roughly 4.0 to 6.7 inches wide. It is listed as compatible with many common models, including multiple iPhone sizes and certain Samsung and OnePlus models.
One thing to keep in mind is how your phone case interacts with the corners. Some buyers mention that the straps grip well even over a slim case, while others caution that corner access can be slightly less convenient because the mount relies on friction at the edges.
Handlebar size range
It is made to clamp onto handlebars in the 18–35mm range. That broad range is useful if you swap bikes, or if you have an e-bike, scooter, or stroller setup where the bar diameter falls within that window.
Adjustability: rotation and orientation
The phone holder head rotates (360°), and you can switch between horizontal and vertical viewing. That is helpful for navigation layouts, music controls, or when you want to switch between landscape for GPS and portrait for calls or messaging.
Because the mount is low-profile, it can also be easier to live with than bulkier holders when you park or store the bike. (Reviewers mention the overall footprint and adjustability as part of why it is appealing versus higher-priced systems.)
Pros for the right rider
- Commuters and casual cyclists: tool-free installation, stable strap grip, and easy phone removal make this a practical grab-and-go option.
- Riders who switch between breaks and riding: detaching the phone without uninstalling the mount reduces friction in daily use.
- Anyone with an 18–35mm handlebar: the clamp range is wide enough to cover many bikes and some power-assisted scooters.
Who should avoid it (or consider an alternative)
- Wet-weather riders: it is not water resistant, so you will likely want a phone bag, screen protection, or a more weather-sealed setup.
- Touchscreen-critical users: if you frequently need to tap near the edges (for maps, typing, or quick gestures), plan on the possibility that corner reach feels less convenient.
- Hard off-road or motorcycle users: some buyer guidance suggests it is better suited to bike-style riding rather than more extreme vibration and impact scenarios.
Price and value
This mount is positioned as an affordable alternative to more expensive mounting ecosystems. Reviewers commonly frame it as “good enough” stability for everyday streets and commuting, with the tradeoff that it is strap-based rather than rigid or highly engineered for extreme conditions.
If you want a straightforward mount that is quick to install and quick to detach, the value proposition is strongest. If you need top-tier touchscreen access at the corners, heavy-duty protection in rain, or extreme off-road/motorcycle performance, you may want a different class of mount.
How it compares to other mounts (by feature priority)
If you want easy phone removal
This detachable strap approach is a strong match. If you dislike mounts that require releasing side clips or removing a top plate, you will likely prefer this simpler “take the phone off, ride on” workflow.
If you want maximum touchscreen usability
Strap-based mounts naturally grip edges, so corner tapping can be less comfortable. If edge-to-edge interaction is essential, look for designs that minimize edge coverage or provide more open corner access.
If you want weather resistance
Because it is not water resistant, it is not the best choice for frequent rain exposure unless you have additional protection for your phone.
Bottom line verdict
The Deerfun detachable bike phone holder is a budget-friendly handlebar mount that prioritizes convenience: tool-free installation, secure strap grip for most 4.0 to 6.7 inch phones, and a rotation feature for portrait or landscape. It is best for commuter-style riding and for riders who want to remove the phone quickly. Choose something else if you need strong weather protection, very fast edge touchscreen control, or a mount intended for harsher motorcycle or hard-core off-road demands.
FAQ
Does this mount work with a phone case?
It is designed to hold smartphones in the 4.0 to 6.7 inch range, and buyers note it can grip a slim case securely. If your case is thick at the corners, it may affect how easily you reach touchscreen edges.
What handlebar sizes does it fit?
It is designed for handlebar diameters in the 18–35mm range, using a silicone buckle and pad system for a firm grip.
Can I rotate the phone while riding?
Yes. The holder is rotatable (360°), so you can switch between horizontal and vertical orientations.
Is it suitable for motorcycles or heavy off-road riding?
It is marketed for bicycles and is generally positioned for everyday bike use. Some buyers suggest it is not the best match for motorcycle use or very hard-core mountain biking conditions.
Is the mount water resistant?
No, it is not water resistant. If you ride in wet weather, plan to protect your phone separately.
Is installation really tool-free?
Yes. Installation uses a silicone pad and tightening buckle, with no tools required.
Specifications
| Product Title | Detachable Bike Phone Holder, Universal Bicycle Motorcycle Cell Phone Mount, 360° Rotatable Adjustable Bike Phone Mount Compatible for 4" to 6.7" Smartphones |
|---|---|
| Category | Automotive > Motorcycle & Powersports > Accessories > Electronics > Electrical Device Mounts |
| Brand | Deerfun |
| Manufacturer | Deerfun |
| Model Name | ZDW-B1 |
| Model Number | ZDW-B1 |
| Color | black |
| Compatible Devices | Smartphones |
| Compatible Phone Models | 4.0" to 6.7" Smartphones |
| Mounting Type | Handlebar |
| Additional Features | Adjustable, Rotatable |
| Water Resistance Level | Not Water Resistant |
| Compatible with Vehicle Type | Bicycle |
| Arm Length | 4 Inches |
| Mfr Part Number | ZDW-B1 |
| Enclosure Material | Silicone |
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