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Btwin 500 Smartphone Holder

Regular price: $14.99 Regular price:

Soft, easy to use smartphone holder: mounts onto the handlebar stem using a strap with a rip-tab fastener.Foam on the back to protect from impacts. The very supple pocket fits the size of the phone.

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Sale price: $14.99 Regular price:

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San Francisco, 735 Market St. Options

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Model: 8385553

Product Videos

Product Features

Btwin 500 Smartphone Holder | We have designed this holder as an easy, reliable way of storing your smartphone on the stem of your bike.

Soft, easy to use smartphone holder: mounts onto the handlebar stem using a strap with a rip-tab fastener.Foam on the back to protect from impacts. The very supple pocket fits the size of the phone.

A photo of the Btwin 500 Smartphone Holder in use


Can be mounted onto any stem.Max. smartphone dimensions: 3.1” x 6.3”


Protection from dust and drizzle (non-waterproof pocket)


This soft pocket takes the shape of your smartphone in order to hold it well.

Item protection

Foam on the back to protect from impacts.

Easy assembly/dismantling

Tool-free assembly using a secure rip-tab.


Protective touchscreen.

Easy to read

The pocket covers the phone completely while leaving the screen visible.

Product Customer Reviews

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Btwin  500 Smartphone Holder,black
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Just the right size

I was actually looking for a way to mount my phone on my top tube. Between my bike computer and headlight, there really isn't much room on my handlebars/stem for my phone. I don't like my phone bouncing around in my back pocket. I tried a top tube bag but found it too big and my knees would brush against it while riding. It took quite a bit of searching to come across this product. The case can be attached to my top tube and is very secure. There is an additional safety strap to make sure that the velcro does not accidentally become undone. That's a nice little detail. My Samsung Galaxy S8 fits perfectly in this case. It's narrow enough that my legs don't hit it even when I'm out of the saddle. The plastic is touch sensitive, so you can use your phone while in the case. However, you can't really use the side buttons. It is a little bit difficult to pull your phone out of the case. The trick that works well for me is to slide a stiff piece of cardboard between the plastic cover and your phone screen before pulling the phone out. As noted in the description, the case isn't 100% waterproof. I haven't used this in the rain yet, so I can't comment on how well it keeps the water out. The stitching on the side of the case was starting to unravel when I received the case, so I had to run it through my sewing machine to reinforce the stitches.


Awesome products.

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Good product

Practical, easy and simple

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Fits iphone xs tightly

Serves it purpose, but not the easiest to use. Good quality and the touch screen works. Siri on iPhone doesn't work, but i would have hoped that it should. Some kind of a small slit at the back would have been a better design rather than having the phone sit so flush that the Mic doesn't pick up voice. Quite happy but could have been better.

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Must have

No need for phone holder, this item is a must for bikers, runners

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excellent piece of equipment, fits a large smart phone, and the touchscreen still works through the protective cover.

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Phone holder

Great product value for money.

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Phone Holder

Great idea to attach to headstock of the bike

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great value for money

attatches to the top tube of the frame, or the swan-neck, or handlebars, depending on your preference (i like the top tube). used it in the pouring rain. didn't slip, slide, or let any moisture in. brilliant

Triban smartphone bike holder

Lacks padding the full length on the rear. As a result the top of the case/phone may rub against the stem of the handlebars. Remember, British roads and particularly small roads are not that great so lots of bumps. It's ok for what it is and reasonably priced. Fingerprint does not work through the plastic but ok on touch.

Not a great product

Difficult to get in and out of the holder. Doesn’t stay on the bike frame well. A clunky, poorly designed product

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Velcro not strong enough

At first I was happy with this as it's easy to attach and fits my phone with no problem, but after a few uses, the velcro is not strong enough and it has fallen off in the middle of the road several times in the last week, one time resulting in a cracked screen.

Phone holder

Fell off second time of using. Velcro not good. Had a refund.

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Excellent service. Good quality item

Nice bit of kit but too small by about 15-20mm for my smart phone.

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Additional Product Information


Main fabric: 100.0% Polyethylene Terephtalate ; Backing: 100.0% Thermoplastic polyurethane


With DECATHLON COACH, you can measure your SPEED, know about the DISTANCE you covered and view your GPS ROUTE: all stats close to hand. FREE mobile app available on AppleStore and GooglePlay.



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For 40 years, Decathlon has delivered the best value in the retail sports industry by offering high-quality, sustainable and cost-effective products.

Decathlon makes the difference
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    Research and development

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    minimize manufacturing costs

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    Minimal retail footprint

    lowers overhead and indirect costs


Size Guide Visual