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Looking for a Samsung phone holder for bike rides and wondering whether the BTR Silicone Handlebar Phone Mount will fit yours? Short answer: yes. It's a universal silicone design that handles every current Samsung Galaxy phone from the compact S24 right up to the S25 Ultra, plus the A series and even the Z Fold and Z Flip when folded. There are real caveats though: chunky cases push the bigger Galaxy models out of the comfortable fit range, foldables have hinge stability quirks, and the silicone mount isn't waterproof. This guide breaks fit down by model so you know exactly what to expect before you click buy.
The BTR mount is an all-silicone universal design. Four corner straps stretch over the phone and a separate strap loops round the handlebars. There's no clamp, no spring-loaded grip and no proprietary cradle, which means it fits almost any phone and almost any handlebar without an adapter.
The practical fit window is roughly 60mm to 90mm of phone width, and the handlebar strap covers 22mm to 32mm bar diameter, which is everything from road drops to mountain bike bars to commuter hybrids. The whole thing weighs about 30g, costs under a tenner and lives on the bike permanently because there's nothing to ruin in the rain. The phone in it, of course, is a different question. We'll come back to that.
The S series is where most Samsung-on-a-bike searches end up. Width is the dimension that matters here, because the silicone straps grip across the long edges of the phone.
For the regular S24 and S25, you've got plenty of slack to add a protective case and still grip securely. For the Ultras, the maths is tighter. With a slim TPU case you're fine. With an OtterBox Defender or similar, you'll be at or past the mount's working width.
The A series sits in similar width territory to the Ultras but without the same depth:
The A series is lighter than the S Ultras and the back is plastic rather than glass, which actually makes it a bit more secure in a silicone mount because the silicone grips plastic better than smooth glass. If you've got an A series and you're worried about fit, don't be. It works.
Folding phones are the awkward one. The BTR mount handles them when folded but not when unfolded.
If you ride with a Z Fold and want to glance at directions, keep it folded and use the cover screen. If you want a bigger display while riding, look at a top tube bag with a clear window or a frame bag rather than trying to perch a folded Fold on the handlebars.
Case thickness is the single biggest factor for Samsung owners deciding on a bike mount. The phone width is fixed, but the cased width varies wildly.
Fine with the BTR mount:
Borderline or too thick:
Rule of thumb: if your cased phone is under 90mm wide, the BTR mount will hold it securely. Over 90mm and you're stretching the silicone beyond the design intent. Measure with a ruler before ordering if you're not sure.
Important caveat. The BTR silicone phone mount is not waterproof and never has been. The phone sits exposed on the handlebars with nothing between it and the sky.
Samsung's IP68 rating on the S series and recent A series gives the phone itself solid splash and rain resistance, but only up to a point. Sustained heavy rain on a long commute will work moisture into the charging port, the speaker grilles and the side buttons over time. If you ride year round in the UK, a bare phone on a silicone mount isn't the right answer for wet days.
Two better options for wet-weather Samsung riding:
For a fuller breakdown of which BTR phone-carry option suits which kind of rider, our best bike phone holder UK 2026 guide compares the silicone mount against the two phone bags head to head, and our best waterproof bike phone bags guide covers the wet-weather options in detail.
Two small things to know if you're putting a Samsung in the BTR mount.
Curved Ultra edges: The S24 Ultra and S25 Ultra have very slight edge curves. Silicone straps grip flat surfaces best, so a smooth glass-backed Ultra can slip a touch under heavy braking or off a kerb. A slim TPU case eliminates this completely because silicone-on-rubber grips better than silicone-on-glass.
Side buttons: Samsung puts the power and volume keys on the right side. If a strap lands across a button it can press it accidentally as the phone vibrates on the bars. Easy fix: rotate the phone so the buttons sit between the strap positions, or mount in landscape mode (most navigation apps default to landscape anyway).
If you want the universal mount, the BTR silicone handlebar phone mount is the cheapest credible option that handles the whole Samsung range. If your commute involves real rain or you ride year round, look at the waterproof phone bags in our phone bags collection instead.
For more on whether the silicone mount or a phone bag is right for your style of riding, the general silicone mount fit guide covers the same ground for iPhone, Pixel and other brands.
With a slim case (under about 3mm per side) yes, comfortably. With a chunky armoured case like an OtterBox Defender the total width pushes past 90mm and the silicone straps stretch beyond their working range. If you've got an Ultra and want serious protection plus a bike mount, switch to a slim case for cycling and keep the armoured case for off-bike use.
It can if the phone is mounted portrait and a strap happens to land across the right edge. Two quick fixes: rotate the phone so the strap sits above or below the button cluster, or mount the phone in landscape orientation. Most cycling apps default to landscape on the move anyway.
When the Fold is folded, yes, with one caveat: the hinge creates a ridge along the long edge that the silicone strap spans rather than sits on. The phone holds but can rock slightly on rough surfaces. Unfolded the Fold is too wide for any handlebar mount.
No. The mount itself is fine in rain (it's just silicone) but it leaves the phone fully exposed. Samsung's IP68 rating gives you splash and short-rain protection but not all-day exposure. For wet rides, switch to the BTR handlebar or top tube phone bag, both of which are waterproof.
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